DTC 137

DTC 137: VSA Pressure Sensor (Software)

1. Turn the ignition switch OFF.
2. Disconnect the brake pedal position switch 4P connector.
3. Do the brake pedal position switch test.

Is the switch OK?

YES - Go to step 4.

NO - Replace the brake pedal position switch.

4. Short the SCS line with the HDS.
5. Disconnect PCM connector A (44P).
6. Turn the ignition switch ON (II).
7. Measure voltage between PCM connector A (44P) terminal No. 40 and body ground.





Is there battery voltage when the brake pedal is released?

YES - Repair short to power in the wire between the brake pedal position switch and the PCM.

NO - Go to step 8.

8. Turn the ignition switch OFF.
9. Substitute a known-good PCM.
10. Turn the ignition switch ON (II).
11. Clear the DTCs with the HDS.
12. Test-drive the vehicle at 8 mph (12 km/h) for 60 seconds or more.
13. Check for DTCs with the HDS.

Is DTC 137 indicated?

YES - Check for loose terminals in the VSA modulator-control unit 46P connector. If necessary, substitute a known-good VSA modulator-control unit and retest.

NO - Replace the original PCM.