Inspection Procedure
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK WIRE HARNESS (AIR CONDITIONING CONTROL ASSEMBLY - BODY GROUND)
- Disconnect the air conditioning control assembly connector.
- Measure the resistance of the wire harness side connector.
Standard resistance
TERMINALS RESISTANCE SPECIFICATION (CONNECTOR(S) DISCONNECTED)Tester Connection Specified Condition E23-7 (GND) - Body ground Below 1
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.
- CHECK WIRE HARNESS (AIR CONDITIONING CONTROL ASSEMBLY - BATTERY)
- Disconnect the E23 air conditioning control assembly connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
TERMINALS VOLTAGE SPECIFICATION (CONNECTOR(S) DISCONNECTED)Tester Connection Condition Specified Condition E23-7 (GND) - E23-2 (IG+) Ignition switch ON 10 to 14 V
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.
- CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL)
- Disconnect the E23 control connector.
- Disconnect the E37 amplifier connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
TERMINALS RESISTANCE SPECIFICATION (CONNECTOR(S) DISCONNECTED)Tester Connection Specified Condition E37-37 (LIN1) - E23-11 (LIN1) Below 1
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.
- REPLACE AIR CONDITIONING AMPLIFIER
- Replace the air conditioning control with a new or properly functioning one.
- Operate the air conditioning control to check that it functions properly.
Result
RESULT REFERENCEResult Proceed to Air conditioning control malfunctions A Air conditioning control functions properly B
B: END (AIR CONDITIONING CONTROL ASSEMBLY IS FAULTY)
A: REPLACE AIR CONDITIONING AMPLIFIER