WIRING DIAGRAM
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK BLOWER MOTOR CIRCUIT. Turn the ignition switch to OFF. Disconnect the power transistor connector. Use a tester to measure the resistance between the connector and chassis ground. Connector & terminal (B57) No. 3 - Chassis ground | Is the resistance 10 ohms or more? | Go to step 2. | Repair or replace the harness. |
| 2 CHECK POWER TRANSISTOR. Measure the resistance between power transistor terminals using a tester. Connector & terminal (B57) No.3 - No.1 | Is the resistance less than 10 ohms? | Replace the power transistor. Refer to REMOVAL , Power Transistor (Auto A/C Model). | Go to step 3 . |
| 3 CHECK HARNESS. Remove the auto A/C control module. Measure the resistance between the power transistor connector and chassis ground using a tester. Connector & terminal (B57) No. 2 - Chassis ground | Is the resistance less than 10 ohms? | Repair or replace the short circuit of the harness. | Replace the auto A/C control module. Refer to REMOVAL , Control Unit (Auto A/C Model). |
DIAGNOSIS PROCEDURE