Toyota 4Runner: Short to B+ in CAN Bus Line

Toyota 4Runner Service Manual / Power Source / Network / Networking / Can Communication System / Short to B+ in CAN Bus Line

DESCRIPTION

There may be a short circuit between the CAN bus lines and +B when the resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ.

Symptom	Trouble Area
The resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ.	Short between CAN bus line and +B Combination meter assembly Skid control ECU (master cylinder solenoid)1 Main body ECU (multiplex network body ECU) Airbag sensor assembly Steering angle sensor (spiral cable sub-assembly) Navigation receiver assembly2 Radio and display receiver assembly3 Certification ECU (smart key ECU assembly)4 Power steering ECU assembly Yaw rate sensor assembly Power management control ECU4 Four wheel drive control ECU1 Skid control ECU (brake actuator assembly)5 Stabilizer control ECU6 Air conditioning amplifier assembly7 ECM No. 1 junction connector1 No. 2 junction connector No. 3 junction connector No. 4 junction connector

Symptom

Trouble Area

The resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ.

Short between CAN bus line and +B
Combination meter assembly
Skid control ECU (master cylinder solenoid)*1
Main body ECU (multiplex network body ECU)
Airbag sensor assembly
Steering angle sensor (spiral cable sub-assembly)
Navigation receiver assembly*2
Radio and display receiver assembly*3
Certification ECU (smart key ECU assembly)*4
Power steering ECU assembly
Yaw rate sensor assembly
Power management control ECU*4
Four wheel drive control ECU*1
Skid control ECU (brake actuator assembly)*5
Stabilizer control ECU*6
Air conditioning amplifier assembly*7
ECM
No. 1 junction connector*1
No. 2 junction connector
No. 3 junction connector
No. 4 junction connector

*1: for 4WD
*2: for Navigation Receiver Type
*3: for Radio and Display Receiver Type
*4: w/ Smart Key System
*5: for 2WD
*6: w/ Kinetic Dynamic Suspension System
*7: w/o Smart Key System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

1.	DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and branch wire.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ).

2.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (DLC3 BRANCH WIRE)

(a) Disconnect the F59 No. 2 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F13-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F13-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

*a	Front view of DLC3

Result

Result	Proceed to
OK (for 4WD)	A
OK (for 2WD)	B
NG	C

GO TO STEP 13

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)

3.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

4.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE)

(a) Disconnect the A36 No. 1 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F13-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F13-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

*a	Front view of DLC3

GO TO STEP 11

5.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - SKID CONTROL ECU (MASTER CYLINDER SOLENOID))

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
A36-1 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
A36-4 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 1 Junction Connector)

Front view of DLC3

GO TO STEP 7

6.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
A36-3 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
A36-6 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 1 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE NO. 1 JUNCTION CONNECTOR

GO TO STEP 9

7.	CONNECT CONNECTOR

(a) Reconnect the A36 No. 1 junction connector connector.

8.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (SKID CONTROL ECU (MASTER CYLINDER SOLENOID))

(a) Disconnect the A6 skid control ECU (master cylinder solenoid) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
A6-11 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
A6-25 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Skid Control ECU (Master Cylinder Solenoid))

Front view of DLC3

REPLACE SKID CONTROL ECU (MASTER CYLINDER SOLENOID)

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (MASTER CYLINDER SOLENOID) (CANH, CANL)

9.	CONNECT CONNECTOR

(a) Reconnect the A36 No. 1 junction connector connector.

10.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)

(a) Disconnect the F14 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F14-1 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F14-2 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Combination Meter Assembly)

Front view of DLC3

REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)

11.	CONNECT CONNECTOR

(a) Reconnect the A36 No. 1 junction connector connector.

12.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

(a) Disconnect the F59 No. 2 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-3 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

13.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

14.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR SIDE)

(a) Disconnect the F60 No. 3 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F13-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F13-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

*a	Front view of DLC3

GO TO STEP 39

15.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

HINT:

For vehicles without a smart key system, go to "Check for Short to B+ in CAN Bus Wire (No. 3 Junction Connector - Power Steering ECU Assembly)".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-17 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 23

16.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-5 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-16 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 25

17.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - YAW RATE SENSOR ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-7 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-18 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 27

18.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)

HINT:

For vehicles without a smart key system, go to "Check for Short to B+ in CAN Bus Wire (No. 3 Junction Connector - Four Wheel Drive Control ECU)".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-4 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-15 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 29

19.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - FOUR WHEEL DRIVE CONTROL ECU)

HINT:

For 2WD vehicles, go to "Check for Short to B+ in CAN Bus Wire (No. 3 Junction Connector - Skid Control ECU (Brake Actuator Assembly))".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-3 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 31

20.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

HINT:

For 4WD vehicles, go to "Check for Short to B+ in CAN Bus Wire (No. 3 Junction Connector - Air Conditioning Amplifier Assembly)".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-9 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-20 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 33

21.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

HINT:

For vehicles with a smart key system, go to "Check for Short to B+ in CAN Bus Wire (No. 3 Junction Connector - ECM)".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-8 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-19 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

GO TO STEP 35

22.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - ECM)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F60-2 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F60-13 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 3 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR

GO TO STEP 37

23.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

24.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the F79 certification ECU (smart key ECU assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F79-9 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F79-10 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))

Front view of DLC3

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (CANH, CANL)

25.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

26.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY)

(a) Disconnect the F41 power steering ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F41-1 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F41-2 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Power Steering ECU Assembly)

Front view of DLC3

REPLACE POWER STEERING ECU ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CANH, CANL)

27.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

28.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (YAW RATE SENSOR ASSEMBLY)

(a) Disconnect the F36 yaw rate sensor assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F36-3 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F36-2 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Yaw Rate Sensor Assembly)

Front view of DLC3

REPLACE YAW RATE SENSOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR ASSEMBLY (CANH, CANL)

29.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

30.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU)

(a) Disconnect the F80 power management control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F80-14 (CA1H) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F80-13 (CA1L) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Power Management Control ECU)

Front view of DLC3

REPLACE POWER MANAGEMENT CONTROL ECU

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER MANAGEMENT CONTROL ECU (CA1H, CA1L)

31.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

32.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU)

(a) Disconnect the F47 four wheel drive control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F47-19 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F47-20 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Four Wheel Drive Control ECU)

Front view of DLC3

Result

Result	Proceed to
OK (for VF2A)	A
OK (for VF4BM)	B
OK (for VF2BM)	C
NG	D

REPLACE FOUR WHEEL DRIVE CONTROL ECU

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO FOUR WHEEL DRIVE CONTROL ECU (CANH, CANL)

33.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

34.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))

(a) Disconnect the A53 skid control ECU (brake actuator assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
A53-25 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
A53-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))

Front view of DLC3

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) (CANH, CANL)

35.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

36.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the F42 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F42-11 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F42-12 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Air Conditioning Amplifier Assembly)

Front view of DLC3

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)

37.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

38.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECM)

(a) Disconnect the F50 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F50-32 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F50-31 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to ECM)

Front view of DLC3

REPLACE ECM

REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL)

39.	CONNECT CONNECTOR

(a) Reconnect the F60 No. 3 junction connector connector.

40.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR SIDE)

(a) Disconnect the G13 No. 4 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F13-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F13-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

*a	Front view of DLC3

GO TO STEP 48

41.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
G13-5 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
G13-16 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 4 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

42.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - NAVIGATION RECEIVER ASSEMBLY)

HINT:

For vehicles without a navigation receiver assembly, go to "Check for Short to B+ in CAN Bus Wire (No. 4 Junction Connector - Radio and Display Receiver Assembly)".

(a) Disconnect the G14 No. 4 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
G14-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
G14-17 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 4 Junction Connector)

Front view of DLC3

GO TO STEP 44

43.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the G14 No. 4 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
G14-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
G14-17 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 4 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE NO. 4 JUNCTION CONNECTOR

GO TO STEP 46

44.	CONNECT CONNECTOR

(a) Reconnect the G13 and G14 No. 4 junction connector connectors.

45.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NAVIGATION RECEIVER ASSEMBLY)

(a) Disconnect the G37 navigation receiver assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
G37-9 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
G37-10 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Navigation Receiver Assembly)

Front view of DLC3

REPLACE NAVIGATION RECEIVER ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NAVIGATION RECEIVER ASSEMBLY (CANH, CANL)

46.	CONNECT CONNECTOR

(a) Reconnect the G13 and G14 No. 4 junction connector connectors.

47.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the G49 radio and display receiver assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
G49-9 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
G49-10 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

Front view of DLC3

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO RADIO AND DISPLAY RECEIVER ASSEMBLY (CANH, CANL)

48.	CONNECT CONNECTOR

(a) Reconnect the G13 No. 4 junction connector connector.

49.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)

(a) Disconnect the F59 No. 2 junction connector connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-1 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-12 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)

50.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-2 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-13 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2 Junction Connector)

Front view of DLC3

GO TO STEP 55

51.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-5 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-16 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2 Junction Connector)

Front view of DLC3

GO TO STEP 57

52.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - STABILIZER CONTROL ECU)

HINT:

For vehicles without a kinetic dynamic suspension system, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Combination Meter Assembly)".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-6 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-17 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2 Junction Connector)

Front view of DLC3

GO TO STEP 59

53.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

HINT:

For 4WD vehicles, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Steering Angle Sensor (Spiral Cable Sub-assembly))".

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-3 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-14 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2Junction Connector)

Front view of DLC3

GO TO STEP 61

54.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY))

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F59-7 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F59-18 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to No. 2 Junction Connector)

Front view of DLC3

REPAIR OR REPLACE NO. 2 JUNCTION CONNECTOR

GO TO STEP 63

55.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

56.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the F9 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F9-14 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F9-13 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Main Body ECU (Multiplex Network Body ECU))

Front view of DLC3

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (CANH, CANL)

57.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

58.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the F33 airbag sensor assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F33-13 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F33-22 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Airbag Sensor Assembly)

Front view of DLC3

REPLACE AIRBAG SENSOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIRBAG SENSOR ASSEMBLY (CANH, CANL)

59.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

60.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (STABILIZER CONTROL ECU)

(a) Disconnect the F70 stabilizer control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F70-29 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F70-28 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Stabilizer Control ECU)

Front view of DLC3

REPLACE STABILIZER CONTROL ECU

REPAIR OR REPLACE CAN BUS BRANCH WIRE CONNECTED TO STABILIZER CONTROL ECU (CANH, CANL)

61.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

62.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)

(a) Disconnect the F14 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F14-1 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F14-2 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Combination Meter Assembly)

Front view of DLC3

REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)

63.	CONNECT CONNECTOR

(a) Reconnect the F59 No. 2 junction connector connector.

64.	CHECK FOR SHORT TO B+ IN CAN BUS WIRE (STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY))

(a) Disconnect the F19 steering angle sensor (spiral cable sub-assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
F19-4 (CANH) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher
F19-3 (CANL) - F13-16 (BAT)	Ignition switch off	6 kΩ or higher

Text in Illustration

Rear view of wire harness connector

(to Steering Angle Sensor (Spiral Cable Sub-assembly))

Front view of DLC3

REPLACE STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY)

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) (CANH, CANL)

Short in CAN Bus Lines

DESCRIPTION There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω. Symptom Trouble Ar ...

Short to GND in CAN Bus Line

DESCRIPTION There may be a short circuit between the CAN bus lines and GND when the resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ω. ...

Other materials about Toyota 4Runner:

Problem Symptoms Table
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