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 |
Rear Window Defogger System does not Operate
DESCRIPTION
When the back door power window is fully closed and the rear window defogger
switch is turned on, a rear window defogger activation request signal is sent via
the LIN communication line to the air conditioning amplifier.
WIRING DIAGRAM
CAU ...
Cellular Phone Inspection
CAUTION / NOTICE / HINT
HINT:
If the operation of a cellular phone or the navigation receiver assembly is requested,
make sure to follow the instructions closely and perform the operation.
PROCEDURE
1.
CHECK USAGE CONDITION
...