Signal Outside Its Permitted Range
Signal outside its permitted range
Checking the connectors
Note! When cables to the brake pressure sensors are physically interchanged when installing, troubleshoot both sensors when trouble code BCM-0136.
- Ignition off
- Check the brake control module (BCM) and the brake pressure sensor connectors. Check for contact resistance and oxidation
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Read off the pressure from the brake system
- Depress the brake pedal.
The brake pressure must increase in both pressure sensors with increased pedal pressure. If the brake pressure increases for both pressure sensors, the cause of the fault was probably contact resistance or oxidation in the control module or pressure sensor connectors.
Other information
- To access the control module connector, see Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box, Brake Control Module (BCM)
- Checking wiring and terminals Checking Wiring And Terminals
Does the pressure increase?
Yes - Fault Found
No - Checking wiring and sensors
-------------------------------------------------
Checking wiring and sensors
- Ignition off
- Connect the breakout box.
Check the ground lead between the relevant brake pressure sensor and the brake control module (BCM). Check for an open-circuit.
For pressure sensor 1, check the cable between pressure sensor terminal #1 and brake control module (BCM) terminal #19 (#A19).
For pressure sensor 2, check the cable between pressure sensor terminal #1 and control module terminal #21 (#A21).
Try another pressure sensor if the cable is OK.
Other information
- To connect the breakout box, see Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box, Brake Control Module (BCM)
- To replace the pressure sensor, see Pressure sensor, master cylinder, replacing Service and Repair
- For information about signals, see Signal specification, brake control module (BCM) with DSTC (dynamic stability and traction control) Signal Specification.
Were any faults found in the cable?
Yes - Verification
No - Checking the control module
-------------------------------------------------
Checking the control module
- Ignition off
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Read off the pressure in the brake system from the relevant pressure sensor
- Depress the brake pedal.
The brake pressure must increase with increased pedal pressure.
Does the brake pressure increase?
Yes - Verification
No - Fault-tracing information
-------------------------------------------------
Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reconnect the connectors, reinstall components etc.
- Ignition on
- Read off the pressure in the brake system from the relevant pressure sensor
- Depress the brake pedal.
The brake pressure must increase with increased pedal pressure.
Does the brake pressure increase?
Yes - VERIFIED
No - VERIFICATION FAILED
------------------------
VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
-------------------------------------------------
Fault-tracing information
Information
Fault-tracing 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.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
------------------------
FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking the connectors
-------------------------------------------------
Fault-tracing information
Information
Fault-tracing information
The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.
Do you want to terminate fault-tracing at this time?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
------------------------
Attempt New Test - Checking the connectors
FAULT-TRACING FAILED - FAULT-TRACING FAILED
-------------------------------------------------