Rear Power Transistor Test

Rear Power Transistor Test
SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service.

1. Remove the driver's seat.
2. Remove the driver's center console trim.
3. Disconnect the 4P connector from the rear power transistor.




4. Measure the resistance between the No. 3 and No. 4 terminals of the rear power transistor. It should be about 1.5 kohms.
- If the resistance is within the specifications, go to step 5.
- If the resistance is not within the specifications, replace the rear power transistor.

NOTE: Also check the rear blower motor. Rear power transistor failure can be caused by a defective rear blower motor.




5. Carefully release the lock tab on the No. 1 terminal (BLU) (A) in the 4P connector, then remove the terminal and insulate it from body ground.
6. Reconnect the 4P connector to the rear power transistor.
7. Make sure the BLU wire is completely isolated, then supply 12 V to the No. 1 cavity with a jumper wire.
8. Turn the ignition switch ON (II), and check that the rear blower motor runs.
- If the rear blower motor does not run, replace the rear power transistor.

NOTE: A faulty rear blower motor can cause the rear power transistor to fail. If the rear power transistor is replaced, also check the rear blower motor for binding, and replace it if necessary.

- If the rear blower motor runs, the rear power transistor is OK.