[55B] AUTOMATIC AIR CONDITIONER - - TROUBLESHOOTING - SYMPTOM PROCEDURES - INSPECTION PROCEDURE 8: The outside/inside air changeover is impossible. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE 8: The outside/inside air changeover is impossible.
| COMMENTS ON TROUBLE SYMPTOM When inside air cannot be changed to outside air vice versa even if its changeover switch is on, the outside/inside air selection damper control motor system may be defective.
| POSSIBLE CAUSES Malfunction of the outside/inside air selection damper control motor Damaged the wiring harness or connectors Malfunction of the automatic air conditioner control panel (A/C-ECU)
| DIAGNOSIS
| Step 1. MUT-II/III actuator test Carry out the actuator test. Item 13, 14: outside/inside air selection damper control motor Q: Does the blower motor work normally? YES: Replace the automatic air conditioner control panel (A/C-ECU) NO: Go to Step 2.
| Step 2. Measure the voltage at C-311 outside/inside air selection damper control motor connector. Disconnect the connector, and measure at the wiring harness side. Ignition switch: ON Voltage between terminal 7 and body earth OK: System voltage Q: Is the check result normal? YES: Go to Step 5. NO: Go to Step 3.
| Step 3. Connector check: C-311 outside/inside air selection damper control motor connector Q: Is the check result normal? YES: Go to Step 4. NO: Repair the connector.
| Step 4. Check the wiring harness between C-311 outside/inside air selection damper control motor connector terminal No.7 and the ignition switch (IG2). NOTE: Prior to the wiring harness inspection, check intermediate connector C-36 and junction block connectors C-203 and C-205, and repair if necessary. Check the power supply line for open circuit. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ). NO: Repair the wiring harness.
| Step 5. Check the outside/inside air selection damper control motor Refer to GROUP 55A, Resistor, blower motor and inside/outside air selection damper control motor . Q: Is the check result normal? YES: Go to Step 6. NO: Replace the outside/inside air selection damper control motor.
| Step 6. Connector check: C-26 A/C-ECU connector and C-311 outside/inside air selection damper control motor connector Q: Is the check result normal? YES: Go to Step 7. NO: Repair the connector.
| Step 7. Check the wiring harness between C-26 A/C-ECU connector (terminals 23 and 26) and C-311 outside/inside air selection damper control motor connector (terminals 6 and 4). NOTE: Prior to the wiring harness inspection, check intermediate connector C-36, and repair if necessary. Check the input and output lines for open or short circuit. Q: Is the check result normal? YES: Replace the automatic air conditioner control panel (A/C-ECU). NO: Repair the wiring harness.

[55B] AUTOMATIC AIR CONDITIONER - - TROUBLESHOOTING - SYMPTOM PROCEDURES - INSPECTION PROCEDURE 8: The outside/inside air changeover is impossible. | PRINT PAGE / INDEX / PRIOR / NEXT

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