Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Adjustable Pedal Switch Circuit Test
- Disconnect the MSM connectors C6 and C7 and verify that none of the adjuster switch inputs are displayed as Active.
- If any of the switch inputs are Active, replace the MSM.
- Verify that battery voltage is not present at the affected switch signal circuit terminal while the switch is inactive.
- If battery voltage is present while the switch is not pressed test the switch signal circuit for a short to voltage. If the circuit tests normal replace the adjustable pedal switch.
- Verify that battery voltage is present at the affected switch signal circuit terminal while pressing the switch.
- If battery voltage is not present while the switch is pressed, repair the switch supply circuit for an open/high resistance or short to ground. If the circuit tests normal replace the adjustable pedal switch.
- If the circuits test normal replace the MSM.
Motor Control Circuit Test
- Disconnect the MSM connector C3.
- Verify that a test lamp illuminates when connected from the high current battery supply circuit terminal 5 to ground.
- If the test lamp does not illuminate, repair the high current battery supply circuit for an open or short to ground.
- Connect the MSM connector C3 and disconnect the adjustable pedal motor connector.
- Connect a test lamp across the motor control circuit terminals.
- Verify that the test lamp illuminates while the adjustable pedal switch is pressed in both directions.
- If the test lamp does not illuminate, repair the motor control circuits for an open/high resistance or short to ground. If the circuits test normal replace the MSM.
- If the circuits test normal replace the brake pedal assembly.