C107C

C107C-BRAKE PEDAL SWITCH 1/2 STUCK





For a complete wiring diagram Diagrams/Electrical. Electrical Diagrams


- When Monitored:

With the ignition on, but not during first run.

- Set Condition:

When the Anti-Lock Brake Module detects a mismatch between the two signals of the redundant stop lamp switch.








Diagnostic Test


1. CHECK FOR A DTC C107C-BRAKE PEDAL SWITCH 1/2 STUCK

NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, read and record DTCs.

With the scan tool, read and record Freeze Frame information.

With the scan tool, erase DTCs.

With the scan tool look at the Brake Switch Signal.

Apply the brakes on and off while checking for a Brake Switch Signal change. If excessive travel occurs before switch engages adjust brake switch before continuing.

Apply the brakes for at least 60 seconds.

With the scan tool, read and record DTCs.

Does the scan tool display: C107C-BRAKE PEDAL SWITCH 1/2 STUCK?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Refer to the ABS-INTERMITTENT CONDITION TEST. ABS Intermittent Condition Test .



2. CHECK THE TERMINALS/CONNECTORS/WIRING HARNESS FOR DAMAGE

Check all related wiring for bruised, chafed, pierced, or partially broken wires.

Check all related connectors for broken, bent, pushed out, or corroded terminals.

Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 3



3. CHECK THE (L50) BRAKE LAMP SWITCH OUTPUT CIRCUIT WHILE DEPRESSING AND RELEASING BRAKE PEDAL

Turn the ignition on.

Depress and release the brake pedal while checking to see if rear brake lights are on.

Does the brake lights illumination with brake applied?

Yes

- Go To 4

No

- Repair open (L50) Brake Lamp Switch Output circuit or open FCM.
- Perform ABS VERIFICATION TEST. ABS Verification Test



4. CHECK THE (B15) BRAKE SWITCH NO. 1 SIGNAL CIRCUIT WHILE DEPRESSING AND RELEASING BRAKE PEDAL

With the scan tool look at the Brake Switch Signal.

Apply the brakes on and off while checking for a Brake Switch Signal change.

Does the Brake Switch status change when brakes are applied?

Yes

- Replace the Anti-lock Bake Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 5



5. CHECK THE (B15) BRAKE SWITCH NO. 1 SIGNAL CIRCUIT FOR AN OPEN





Turn the ignition off.

Disconnect the Stop Lamp Switch harness connector.

Measure the resistance of the (B15) Brake Switch No. 1 Signal circuit.

Is the resistance below 5.0 ohms?

Yes

- Replace the Stop Lamp Switch.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Repair the (B15) Brake Switch No. 1 Signal circuit for an open.
- Perform ABS VERIFICATION TEST. ABS Verification Test