Toyota 4Runner: Lost Communication with Combination Meter (B2661,B2662)

Toyota 4Runner Service Manual / Power Source / Network / Networking / Lin Communication System / Lost Communication with Combination Meter (B2661,B2662)

DESCRIPTION

This DTC is stored when LIN communication between the drive monitor switch and combination meter assembly stops 10 seconds or more.

DTC Code	DTC Detection Condition	Trouble Area
B2661	No communication between the drive monitor switch and combination meter assembly for 10 seconds or more.	Drive monitor switch Combination meter assembly Harness or connector
B2662

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the ignition switch off to troubleshoot:
Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

HINT:

As the combination meter assembly incorporates the accessory meter function, DTC B2662 is stored at the same time as B2661. The accessory meter assembly does not support LIN communication. Therefore, if DTCs B2661 and B2662 are stored, check for communication disruptions between the drive monitor switch and the combination meter assembly.

PROCEDURE

CLEAR DTC

(a) Clear the DTCs (See page ).

2.	CHECK FOR DTC

(a) Check for DTCs (See page ).

OK:

DTC B2661 and B2662 are not output.

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (DRIVE MONITOR SWITCH - COMBINATION METER ASSEMBLY)

(a) Disconnect the U1 drive monitor switch connector.

(b) Disconnect the F14 combination meter assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
U1-4 (LIN) - F14-6 (LINT)	Always	Below 1 Ω
U1-4 (LIN) or F14-6 (LINT) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)

(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	Condition	Specified Condition
F14-20 (E1) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F14-15 (B) - Body ground	Always	11 to 14 V
F14-17 (IG+) - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Combination Meter Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	REPLACE COMBINATION METER ASSEMBLY

(a) Temporarily replace the combination meter assembly with a new one (See page ).

CLEAR DTC

(a) Clear the DTCs (See page ).

7.	CHECK FOR DTC

(a) Check for DTCs (See page ).

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)

REPLACE DRIVE MONITOR SWITCH

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