Refer to "57.HVAC Control 7A.Troubleshooting(Auto A/C) diagnostic system check-auto A/C controls".
1) Turn OFF the ignition switch.
2) Disconnect the auto A/C control unit harness connector (B10) and mix actuator (driver side) harness connector (B64).
3) Inspect the wire harnesses and connectors for the following. Is the result normal?
Wire harness to be inspected
Inspection items
Refer to "LHD HVAC (Automatic Air Conditioner)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD HVAC (Automatic Air Conditioner)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Position sensor 5 V power supply voltage inspection.
No
Repair the circuit as necessary.
1) Connect the auto A/C control unit harness connector (B10).
2) Turn ON the ignition switch.
3) Measure the voltage between the 5 V power supply circuit and the low reference circuit of the position sensor (pins 1 and 3 of B64) with a DMM. Is the voltage within the specified range?
Value: 4.5 to 5.5 V
Refer to "LHD HVAC (Automatic Air Conditioner)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD HVAC (Automatic Air Conditioner)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
Replace the mix actuator (driver side).
Refer to "7.HVAC 7B.Heater Ventilator Airconditioner actuator removal".
Refer to "7.HVAC 7B.Heater Ventilator Airconditioner actuator installation".
No
=>Go to Control panel replacement.
Note
Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever removal".
Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever installation".
Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever setting".
Procedure completion
1) Clear the DTC with a scan tool.
2) Turn OFF the ignition switch.
3) Start the engine.
4) Observe the DTC information with a scan tool.