DESCRIPTION
This circuit provides power to the certification ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND) |
(a) Disconnect the F79 ECU connector. |
|
(b) 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 |
Engine switch off |
Below 1 V |
F79-16 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
F79-17 (CUTB) - Body ground |
Always |
11 to 14 V |
(c) 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 |
*a |
Front view of wire harness connector (to Certification ECU) |
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Short to GND in Motor LH Circuit (21,23)
DESCRIPTION
When there is a short to GND in the side auto step motor circuit, the side auto
step controller ECU assembly does not operate the automatic running board.
DTC No.
Detection Condition
Trouble Area
...
Wireless Door Lock Tuner Circuit Malfunction (B1242)
DESCRIPTION
The door control receiver receives signals from the transmitter and sends these
signals to the main body ECU. This DTC is stored when the applicable RDA signal
cannot be received within 1 second of the PRG signal being output from the main
b ...