DESCRIPTION
The main power source is supplied to the air conditioning amplifier assembly when the ignition switch is turned to ON. The power source is used for operating the air conditioning amplifier assembly, servo motors, etc.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Start the engine before inspection. Check the relays, fuses and battery if the engine does not start.
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND) |
(a) Disconnect the F42 amplifier connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F42-1 (IG+) - Body ground |
Ignition switch off |
Below 1 V |
Ignition switch ON |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F42-14 (GND) - Body ground |
Always |
Below 1 Ω |
*a |
Rear view of wire harness connector (to Air Conditioning Amplifier Assembly) |
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
IG2 Signal Malfunction (B2788)
DESCRIPTION
The steering lock ECU determines the on/off status of the engine switch through
the IG2 signal circuit.
The steering lock ECU does not lock the steering when it receives the IG2 relay
on signal. This prevents the steering from being locked wh ...
Open Circuit in IG1/IG2 Power Source Circuit (C1242)
DESCRIPTION
If there is a problem with the master cylinder solenoid (skid control ECU) power
supply circuit, the skid control ECU stores DTCs and prohibits operation under the
fail-safe function.
If the voltage supplied to the IG2 terminal is within the ...