Pinpoint Test B: DTC C1446 - Brake Switch Circuit Failure
CAUTION:
Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
- B1 CHECK THE STOPLAMP OPERATION
- Check the stoplamps for correct operation by pressing and releasing the brake pedal and observing the stoplamps.
- Do the stoplamps operate correctly?
Yes : GO to B2.
No : REFER to EXTERIOR LIGHTING for further diagnosis of the stoplamps.
- B2 MONITOR THE BRAKE SWITCH PID
- Key in OFF position.
- Connect the scan tool.
- Key in ON position.
- Enter the following diagnostic mode on the scan tool: Generic Electronic Module (GEM) PID.
- Monitor the GEM brake switch PID status while pressing and releasing the brake pedal.
- Does the PID value agree with the positions of the brake switch?
Yes : GO to B3.
No : GO to B4.
- B3 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS connector.
- Check for:
- Corrosion.
- Pushed-out pins.
- Connect the ABS connector and make sure it is seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.
No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
- B4 CHECK FOR CORRECT GEM OPERATION
- Disconnect all GEM connectors.
- Check for:
- Corrosion.
- Pushed-out pins.
- Connect all GEM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new GEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.