Inspection Procedure
WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Start the engine before the inspection. Check the IG1 relay or battery if the engine does not start.
- INSPECT FUSE (A/C)
- Remove the A/C fuse from the main body ECU.
- Measure the resistance.
Standard resistance: Bellow 1Ω
- Reinstall the A/C fuse.
NG: REPLACE FUSE
OK: GO TO NEXT STEP
- INSPECT AIR CONDITIONING AMPLIFIER
- Disconnect the E8 air conditioning amplifier connector.
- Measure the voltage.
Standard voltage
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Condition Specified Condition E8-8(IG+)-E8-12(GND) Ignition switch ON 11 to 14 V - Reconnect the air conditioning amplifier connector.
NG: Go to step 3
OK: REPLACE AIR CONDITIONING AMPLIFIER
- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - MAIN BODY ECU)
- Disconnect the E8 air conditioning amplifier connector.
- Disconnect the 4S main body ECU connector.
- Measure the resistance.
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Specified Condition E8-8(IG+)-4S-10 Below 1 Ω - Reconnect the air conditioning amplifier connector.
- Reconnect the main body ECU connector.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: GO TO NEXT STEP
- CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND)
- Disconnect the E8 air conditioning amplifier connector.
- Measure the resistance.
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Specified Condition E8-12 (GND) - Body ground Below 1 Ω - Reconnect the air conditioning amplifier connector.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE