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B1010






B1010-67-BRAKE PEDAL SWITCHES - SIGNAL INVALID

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Body Control Module (BCM) monitors the inputs from the Stop Lamp Switch. The Stop Lamp Switch contains a normally open switch and a normally closed switch. Separate fused ignition run/start voltage circuits supply the switches.

- When Monitored:
With the ignition on.

- Set Condition:
When the BCM detects that the two switches do not agree on the position of the Brake Pedal.





NOTE: If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

NOTE: Check the related fuses for a missing or blown fuse. If the fuse is blown, diagnose the short to ground concern before replacing the fuse.

1. CHECK FOR AN INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. Apply and release the Brake Pedal several times.
4. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK BRAKE PEDAL SWITCH 1 STATUS
1. With the scan tool, read the Brake Pedal Switch 1 (N.O.) input.
2. Press and release the brake pedal several times.

Does the scan tool display Brake Pedal Switch 1 (N.O.): OFF and ON for the appropriate pedal position?

Yes

- Go To 3

No

- Go To 8

3. CHECK BRAKE PEDAL SWITCH 2 STATUS
1. With the scan tool, read the Brake Pedal Switch 2 (N.C.) input.
2. Press and release the brake pedal several times.

Does the scan tool display Brake Pedal Switch 2 (N.C.): OFF and ON for the appropriate pedal position?

Yes

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. CHECK THE FUSED RUN-START OUTPUT CIRCUIT TO BRAKE SWITCH 2 FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Stop Lamp Switch harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the Fused Run-Start Output circuit at the Stop Lamp Switch harness connector.

Does the test light illuminate brightly?

Yes

- Go To 5

No

- Repair the open in the Fused Ignition Run-Start Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK THE STOP LAMP SWITCH - BRAKE SWITCH 2 CIRCUIT OPEN
1. With the scan tool, read the Brake Pedal Switch 2 (N.C.) input.
2. Connect a jumper wire between the (B16) Brake Signal 2 circuit and the Fused Ignition Run-Start Output circuit at the Stop Lamp Switch harness connector.
3. Remove and reconnect the jumper wire.

Does the scan tool display Brake Pedal Switch 2 (N.C.): OFF and ON and the jumper wire is removed and reconnected?

Yes

- Replace the Stop Lamp Switch. Stop Lamp Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 6

6. CHECK THE (B16) BRAKE SIGNAL 2 CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the BCM C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (B16) Brake Signal 2 circuit at the Stop Lamp Switch harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in the (B16) Brake Signal 2 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 7

7. CHECK THE (B16) BRAKE SIGNAL 2 CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance of the (B16) Brake Signal 2 circuit between the Stop Lamp Switch harness connector and the BCM C1 harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Replace the BCM. Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open in the (B16) Brake Signal 2 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

8. CHECK THE FUSED IGNITION RUN-START OUTPUT CIRCUIT TO BRAKE SWITCH 1 FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Stop Lamp Switch harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the Fused Ignition Run-Start Output circuit at the Stop Lamp Switch harness connector.

Does the test light illuminate brightly?

Yes

- Go To 9

No

- Repair the open in the Fused Ignition Run-Start Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

9. CHECK THE STOP LAMP SWITCH - BRAKE PEDAL SWITCH 1 SIGNAL OPEN
1. With the scan tool, read the Brake Pedal Switch 1 (N.O.) input.
2. Connect a jumper wire between the (B15) Brake Signal 1 circuit and the Fused Ignition Run-Start Output circuit at the Stop Lamp Switch harness connector.

Does the Brake Pedal Switch 1 (N.O.) input change state?

Yes

- Replace the Stop Lamp Switch. Stop Lamp Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 10

10. CHECK THE (B15) BRAKE SIGNAL 1 CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the BCM C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (B15) Brake Signal 1 circuit at the Stop Lamp Switch harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in the (B15) Brake Signal 1 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 11

11. CHECK THE (B15) BRAKE SIGNAL 1 CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance of the (B15) Brake Signal 1 circuit between the Stop Lamp Switch harness connector and the BCM C1 harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Replace the BCM. Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open in the (B15) Brake Signal 1 circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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