Signal Missing. Permanent Fault

Signal missing. Permanent fault

STC or DSTC




Question

Question

Does the car have a DSTC system?

Yes - DSTC

No - STC

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STC - Checking the connectors for the control module and wheel sensor

DSTC - Signal missing. Permanent fault DSTC

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Checking the connectors for the control module and wheel sensor








- Ignition off.
- Check the wheel sensor and ABS control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Reinstall the components, reconnect the connectors etc.
- Raise the car so that the relevant wheel is clear of the ground.
- Ignition on.
- Read off the wheel speed for the relevant wheel.
Spin the relevant wheel and check that the wheel speed is updated.
If the wheel speed is updated, the cause of the fault was loose connections in the connectors for the control module or wheel sensor.

Other information:
- To disconnect the wheel sensor connector, see Wheel sensor, front, replacing Wheel Sensor Front, Replacing.
- To disconnect the ABS control module connector, see Control module (ABS), replacing Brake Control Module (BCM), Replacing.





Is the wheel speed updated?

Yes - Fault Found

No - Checking wiring and sensors

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Checking wiring and sensors
Check the wiring for power supply between the relevant wheel sensor:

Diagnostic Trouble Code (DTC) ABS-0010 Front left wheel sensor
#1 and control module #2

Diagnostic Trouble Code (DTC) ABS-0020 Front right wheel sensor
terminal #1 and control module terminal #20
for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Hint: With the ignition on, the voltage should be approximately 1 V under Ubat measured at the ground terminal.

Check the signal cables between the relevant wheel sensor:

Diagnostic Trouble Code (DTC) ABS-0010 Front left wheel sensor
terminal #2 and control module terminal #1

Diagnostic Trouble Code (DTC) ABS-0020 Front right wheel sensor
terminal #2 and control module terminal #19
for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the sensor (with the sensor connected): Switch on the ignition and measure the signal from sensor between breakout box:

Diagnostic Trouble Code (DTC) ABS-0010 Front left wheel sensor
terminal #1 and ground terminal.

Diagnostic Trouble Code (DTC) ABS-0020 Front right wheel sensor
terminal #19 and ground terminal.
The voltage should vary by approximately 1 V when the pulse wheel is rotating. Replace the wheel sensor if the voltage is faulty.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the ABS breakout box Pinout Values and Diagnostic Parameters.
- To replace the wheel sensor, see Wheel sensor, front, replacing Wheel Sensor Front, Replacing.
- To disconnect the control module, see Control module (ABS), replacing Brake Control Module (BCM), Replacing.
- For other values, see Signal specification, ABS control module Signal Specification.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall connectors, components etc.
- Raise car so the relevant wheel is clear of ground.
- Ignition on.
- Read off wheel speed for relevant wheel.
Spin the relevant wheel and check that wheel speed is updated.





Is the wheel speed updated?

Yes - VERIFIED

No - VERIFICATION FAILEDPAPER

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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 for the control module and wheel sensor

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Signal missing. Permanent fault DSTC





Signal missing. Permanent fault

Checking the connectors for the control module and wheel sensor








- Ignition off.
- Check the wheel sensor and ABS control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Reinstall the components, reconnect the connectors etc.
- Raise the car so that the relevant wheel is clear of the ground.
- Ignition on.
- Read off the wheel speed for the relevant wheel.
Spin the relevant wheel and check that the wheel speed is updated.
If the wheel speed is updated, the cause of the fault was loose connections in the connectors for the control module or wheel sensor.

Other information:
- To disconnect the wheel sensor connector, see Wheel sensor, front, replacing Wheel Sensor Front, Replacing.
- To disconnect the ABS control module connector, see Replacing ABS / DSTC (dynamic stability and traction control) control module Replacing ABS / DSTC (Dynamic Stability and Traction Control) Control Module.





Is the wheel speed updated?

Yes - Fault Found

No - Checking wiring and sensors

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Checking wiring and sensors
Check the wiring for power supply between the relevant wheel sensor:

Diagnostic Trouble Code (DTC) ABS-0010 Front left wheel sensor
terminal #1 and control module terminal #34

Diagnostic Trouble Code (DTC) ABS-0020 Front right wheel sensor
terminal #1 and control module terminal #4
for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Hint: With the ignition on, the voltage should be approximately 1 V under Ubat measured at the ground terminal.

Check the signal cables between the relevant wheel sensor:

Diagnostic Trouble Code (DTC) ABS-0010 Front left wheel sensor
terminal #2 and control module terminal #33

Diagnostic Trouble Code (DTC) ABS-0020 Front right wheel sensor
terminal #2 and control module terminal #3
for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the sensor (with the sensor connected): Switch on the ignition and measure the signal from sensor between breakout box:

Diagnostic Trouble Code (DTC) ABS-0010 Front left wheel sensor
terminal #33 and ground terminal.

Diagnostic Trouble Code (DTC) ABS-0020 Front right wheel sensor
terminal #3 and ground terminal.
The voltage should vary by approximately 1 V when the pulse wheel is rotating. Replace the wheel sensor if the voltage is faulty.
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 wheel sensor, see Wheel sensor, front, replacing Wheel Sensor Front, Replacing.
- To disconnect the control module, see Replacing ABS / DSTC (dynamic stability and traction control) control module Replacing ABS / DSTC (Dynamic Stability and Traction Control) Control Module.
- For other values, see Signal specification, ABS / DSTC (dynamic stability and traction control) control module Signal Specification.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification
Verification
VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information
Information
FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the connectors for the control module and wheel sensor

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FAULT FOUND - Fault Found

FAULT-TRACING FAILED - FAULT-TRACING FAILED

No Fault Found - No Fault Found

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