|
- Battery voltage is applied to the A/C switch connector terminal from the engine-ECU connector terminal AC/S.
|
|
- When the air conditioner switch is turned on, the engine-ECU will receive the A/C ON signal from the switch. The engine-ECU uses this signal to control the A/C compressor relay.
|
|
- Failed A/C switch of heater control unit
- Open/short circuit or harness damage in A/C switch circuit or loose connector contact
- Failed engine-ECU
|
|
- Data list reference table (Refer to
).
- Item 76: A/C switch
|
|
Q.
Is the check result normal?
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
|
|
|
|
- Check the A/C switch (Refer to GROUP 55A - Heater Control Unit - Air Conditioner Switch Continuity Check
).
|
|
Q.
Is the check result normal?
|
|
Replace the heater control unit.
|
|
|
|
- Disconnect connector, and measure at the harness side.
- Ignition switch: ON
- Voltage between terminal AC/S line and earth.
|
|
Q.
Is the check result normal?
|
|
Q.
Is the check result normal?
|
|
Repair the connector(s) or wiring harness.
|
|
|
|
Q.
Is the check result normal?
|
|
Repair the connector(s) or wiring harness.
|
|
|
|
Q.
Is the check result normal?
|
|
Repair the connector(s) or wiring harness.
|
|
|
|
- Data list reference table (Refer to
).
- Item 76: A/C switch
|
|
Q.
Is the check result normal?
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
|
|
|