Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Checking the connectors




- Ignition off
- Check the ABS control module and pedal pressure sensor connectors. Check for contact resistance and oxidation
- Reinstall the components, reconnect the connectors etc.
- Test drive the car. See Test Drive Form (DSTC (dynamic stability and traction control) /brake control module), description Test Drive Form (DSTC (Dynamic Stability And Traction Control) /Brake Control Module), Description
- Ignition on
- Read off diagnostic trouble codes (DTCs).
If the status of the diagnostic trouble code (DTC) has changed from permanent to intermittent, the fault was probably contact resistance or oxidation in the pedal pressure sensor or control module connectors.

Other information
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals









Is the status of the diagnostic trouble code (DTC) intermittent?

Yes - Fault Found

No - Checking wiring and sensors

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Checking wiring and sensors
Check the wiring between the pedal pressure sensor:
- terminal #1 and control module terminal #13 (terminal #A13)
- terminal #2 and control module terminal #29 (terminal #A29)
- terminal #5 and control module terminal #32 (terminal #A32).
Check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage. Continue with the following check if no fault is found.

Checking the pedal pressure sensor
- Ignition on
- Connect the breakout box to the wiring (not to the ABS control module).
Check the pedal pressure sensor. Measure the resistance between terminals #A13 and #A32 on the breakout box.
When the brake pedal is not depressed the resistance must be infinite.
When the brake pedal is depressed the resistance must be 0 ohms.

Also check the resistance between terminals #A29 and #A32 on the breakout box.
When the brake pedal is unaffected, the resistance must be 0 ohms.
When the brake pedal is depressed the resistance must be infinite.

Remedy as necessary.

Other information
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- To replace the pedal pressure sensor (power brake booster), see Replacing the power brake booster (DSTC) Replacing the Power Brake Booster (DSTC) for a right-hand drive car, see Replacing the power brake booster (DSTC) Replacing the Power Brake Booster (DSTC)
- For information about signals, see Signal specification, ABS / DSTC (dynamic stability and traction control) control module Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals













Was a fault detected?

Yes - Verification

No - No Fault Found

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Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.




- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
- Read off the status of the pedal pressure sensor.
- Press the brake pedal down and then release it.









Has the status changed?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

PAPER - No Fault Found

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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

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the connectors

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