DESCRIPTION
Detection Item |
Symptoms |
Trouble Area |
---|---|---|
Certification ECU Communication Stop Mode |
Either condition is met:
|
|
HINT:
For vehicles with a smart key system only.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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 or 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 OPEN IN CAN BUS WIRE (CERTIFICATION ECU BRANCH WIRE) |
(a) Disconnect the F79 certification ECU 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) - F79-10 (CANL) |
Ignition switch off |
54 to 69 Ω |
*a |
Rear view of wire harness connector (to Certification ECU) |
NG |
REPAIR OR REPLACE CERTIFICATION ECU BRANCH WIRE OR CONNECTOR (CANH, CANL) |
|
3. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND) |
(a) Connect the cable to the negative (-) battery terminal. NOTICE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ). |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F79-15 (E) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F79-1 (+B) - Body ground |
Always |
11 to 14 V |
F79-16 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
F79-17 (CUTB) - Body ground |
Always |
11 to 14 V |
*a |
Rear view of wire harness connector (to Certification ECU) |
OK |
REPLACE CERTIFICATION ECU |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Open in Pump Motor Circuit (C1251)
DESCRIPTION
The motor relay (semiconductor relay) is built into the master cylinder solenoid
and drives the pump motor based on a signal from the skid control ECU.
DTC Code
DTC Detection Condition
Trouble Area
...
Front Airbag Sensor LH Malfunction (B1615/14)
DESCRIPTION
The front airbag sensor LH consists of the diagnostic circuit and frontal deceleration
sensor, etc.
If the center airbag sensor receives signals from the frontal deceleration sensor,
it determines whether the SRS should be activated.
DTC B16 ...