Signal Outside its Permitted Range
Signal outside its permitted range
Checking the diagnostic trouble codes (DTCs)
If there are any other diagnostic trouble codes (DTCs) stored for the brake pedal position sensor or for the stop lamp switch, fault-trace these first.
Were other diagnostic trouble codes (DTCs) stored for the pedal position sensor or the stop lamp switch?
Yes - DONE
No - Checking the control module and sensor connectors
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Checking the control module and sensor connectors
Hint: The cause of the diagnostic trouble code (DTC) may be in the circuit for the stop lamp switch or for the pedal position sensor.
- Ignition off
- Check the connectors for the brake control module (BCM), the stop lamp switch and the pedal position sensor. Check for contact resistance. Check for oxidation
- Reinstall the components, connectors, etc.
- Ignition on
- Read off the status of the stop lamp switch and the position of the pedal position sensor.
Depress and release the brake pedal. The value must change between OFF and ON and the position of the pedal position sensor must be updated.
Other information
- Connecting the breakout box Connecting The Breakout Box, Brake Control Module (BCM)
- Stoplamp switch Service and Repair
- Position sensor, brake pedal Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Select an alternative
1. The value for the stop lamp switch does not change
2. The value for the pedal position sensor is not updated
3. These values are OK.
Does the value change?
1 - Checking fuse, wiring and sensors
2 - Signal outside its permitted range
3 - No Fault Found
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Checking fuse, wiring and sensors
Check that the fuse for the stop lamp circuit is intact. If the fuse is blown, first check the circuit for the stop lamp switch before replacing the fuse. Check for a short-circuit to supply voltage.
If the fuse is intact, check the circuit for the stop lamp switch. Check for an open-circuit. Check for a short-circuit to ground.
Remedy as necessary.
Other information
- To connect the breakout box, brake control module (BCM), see: Connecting the breakout box Connecting The Breakout Box, Brake Control Module (BCM)
- To connect the breakout box, engine control module (ECM), see: Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- To connect the breakout box, central electronic module (CEM), see: Connecting the breakout box Connecting The Breakout Box, Central Electronic Module (CEM) Connecting the breakout box Connecting The Breakout Box, Central Electronic Module (CEM)
- Stoplamp switch Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Was a fault detected?
Yes - Verification
No - Fault-tracing information
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Signal outside its permitted range
Checking the connectors
- Ignition off
- Check the connectors for the brake control module (BCM) and the pedal position sensor. Check for contact resistance. Check for oxidation
- Reinstall the components, connectors, etc.
- Connect the breakout box
- Ignition on
- Read off the signal from the pedal position sensor.
Depress the brake pedal. Check that the pedal signal is updated.
Other information
- Connecting the breakout box Connecting The Breakout Box, Brake Control Module (BCM)
- Checking wiring and terminals Checking Wiring and Terminals
Was the signal updated?
Yes - Fault Found
No - Checking the wiring and sensors
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Checking the wiring and sensors
Check the wiring between the pedal position sensor:
- terminal #1 and brake control module (BCM) terminal #22 (#A22)
- terminal #2 and brake control module (BCM) terminal #21 (#A21)
- terminal #3 and brake control module (BCM) terminal #3 (#A3).
Check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage.
Hint: Connect an ohmmeter between terminals #2 and #3 on the pedal position sensor connector.
The resistance must be approximately 0.5 kohms with the brake pedal unaffected and approximately 2.5-3 kohms when the brake pedal is depressed.
Connect an ohmmeter between terminals #1 and #3 on the pedal position sensor connector.
The resistance must be approximately 2.5-3 kohms with the brake pedal unaffected and approximately 0.5 kohms with depressed brake pedal.
Replace the pedal position sensor if the resistance is incorrect.
Replace the pedal position sensor if no fault is found.
Other information
- Connecting the breakout box Connecting The Breakout Box, Brake Control Module (BCM)
- Position sensor, brake pedal Service and Repair
- Signal description with DSTC Signal Description With DSTC
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Verification
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Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reconnect the connectors, components, etc.
- Ignition on
- Read off the status of the stop lamp switch or the value of the pedal position sensor.
Depress and release the brake pedal. The status must switch between OFF and ON and the value must change.
Does the value change?
Yes - Fault Found
No - Fault-tracing information
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Fault-tracing information
Information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
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