## Climate Control

#### DTC Troubleshooting (cont'd)

21-137

5-door DTC 12: A Problem in the Blower Motor Circuit

1. Check the No. 12 (40A) fuse in the under-hood fuse/relay box and the No. 14 (10A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 2.

NO - Replace the fuse(s) and recheck.

2. Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire.

BLOWER MOTOR 2P CONNECTOR

Wire side of female terminals

3. Turn the ignition switch ON (II).

Does the blower motor run?

YES - Go to step 4.

NO - Go to step 17.

4. Turn the ignition switch OFF.
5. Disconnect the jumper wire.
6. Disconnect the power transistor 4P connector.

7. Check for continuity between the No. 3 terminal of the power transistor 4P connector and body ground.

POWER TRANSISTOR 4P CONNECTOR

Wire side of female terminals

Is there continuity?

YES - Go to step 8.

NO - Check for an open in the wire between the power transistor and body ground. If the wire is OK, check for poor ground at G501.

8. Connect the No. 1 and No. 3 terminals of the power transistor 4P connector with a jumper wire.

POWER TRANSISTOR 4P CONNECTOR

Wire side of female terminals

9. Turn the ignition switch ON (II).

Does the blower motor run at high speed?

YES - Go to step 10.

NO - Repair open in the wire between the power transistor and the blower motor.

10. Turn the ignition switch OFF.
11. Disconnect the jumper wire.