Electrical Or Mechanical Fault
Electrical or mechanical fault
Other diagnostic trouble codes (DTCs)
Read off other diagnostic trouble codes (DTCs).
Hint: To guarantee the correct diagnostic trouble code (DTC) status, if any of the following DTCs are stored, the DTC status must be established by a status check.
Are diagnostic trouble codes (DTCs) ABS-431, ABS-432 or ABS-433 stored?
Yes - Status check
No - Electrical or mechanical fault
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Electrical or mechanical fault
Electrical or mechanical fault. Permanent fault
Connecting breakout box and checking ground terminals
Connecting the breakout box
Connecting the breakout box
- Ignition off.
- Disconnect the ABS control module by pressing in the catch on the rear edge of the cover (wheel arch side). Carefully turn the cover upwards so that the locking catches release.
- Check control module and control module connector to ensure that: Male and female terminals are undamaged and properly attached (cannot be pressed in). Female terminal cables are correctly connected to the terminals.
- Pay particular attention to the terminals related to the diagnostic trouble code (DTC)/symptom.
- Connect adapter 951 1354 Adapter 25-pin ABS 850 951 1354 Adapter 25-Pin ABS 850 to the control module connector (wiring side) and connect breakout box 951 1428 Breakout box 951 1428 Breakout Box to the adapter.
- Control module disconnected.
- Then check ground terminals.
Continue - Checking ground terminals
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Checking ground terminals
- Ignition off.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
- Connect an ohmmeter between battery negative terminal and #8 and #24 on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings.
OK - Return to the fault-tracing procedure where it was interrupted.
Reading is OK
Not OK - Check ground terminal 1/1 (battery negative terminal) and cable between ground terminal and control module #8 and #24, for an open-circuit and contact resistance.-Return to the fault-tracing procedure where it was interrupted.
Value is not OK
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Reading is OK
- Return to the fault-tracing procedure where it was interrupted.
Continue - FAULT FOUND
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Value is not OK
- Check ground terminal 1/1 (battery negative terminal) and cable between ground terminal and control module #8 and #24, for an open-circuit and contact resistance.
- Return to the fault-tracing procedure where it was interrupted.
Continue - FAULT FOUND
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FAULT FOUND - Checking control module power supply
FAULT-TRACING FAILED - Checking control module power supply
No Fault Found - Checking control module power supply
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Checking control module power supply
- Ignition off.
- Control module disconnected.
Connect a voltmeter between #25 and #8 on the breakout box.
The voltmeter should read approximately battery voltage.
OK - Checking resistance to ground in pump motor circuit
Not OK - Checking fuse 11/9
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Checking fuse 11/9
Check that fuse 11/9 is intact.
Is fuse 11/9 intact?
Yes - Checking voltage before fuse 11/9
No - Checking for a short-circuit and replacing component
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Checking for a short-circuit and replacing component
Check cable between fuse 11/9 and engine control module (ECM) #25 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Then replace the fuse.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking voltage before fuse 11/9
Connect a voltmeter between the rear socket (windshield side) on the fuse holder for fuse 11/9 and ground.
The voltmeter should read approximately battery voltage.
OK - Checking for an open-circuit in the cable
Not OK - Checking for an open-circuit in the cable
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Checking for an open-circuit in the cable
Check cable between fuse 11/9 and control module #25 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking for an open-circuit in the cable
Check cable between fuse 11/9 and battery for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking resistance to ground in pump motor circuit
- Ignition off.
- Pump motor connector disconnected.
Connect an ohmmeter between pump motor connector terminal M+ and ground.
The ohmmeter should read infinite resistance.
OK - Checking pump motor
Not OK - Checking for a short-circuit and replacing component
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Checking for a short-circuit and replacing component
Check cables between pump motor and pump motor connector for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If the wiring is OK: try a new ABS hydraulic modulator.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking pump motor
Temporarily connect an unfused cable between pump motor connector
- terminal M- and battery negative terminal
- terminal M+ and battery positive terminal
When the cable is connected to the battery the motor should start. Run for a maximum of 10 seconds. Remove temporary cables.
Does the pump motor start and operate normally?
Yes - Checking the control module
No - Check for an open-circuit in the cable and short-circuit
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Check for an open-circuit in the cable and short-circuit
Check cables between pump motor and pump motor connector for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If the wiring is OK: try a new ABS hydraulic modulator.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking the control module
- Ignition off.
- Connect pump motor connector.
- Ignition on.
- Use the Activation function to activate the pump motor.
Check that the pump motor starts and operates normally.
Is the pump OK?
Yes - Checking for contact resistance and oxidation
No - Replacing component
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Checking for contact resistance and oxidation
The cause of the diagnostic trouble code (DTC) has been loose connections in the control module (TCM) or pump motor connector.
Check connectors for contact resistance and oxidation and remedy in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Replacing component
Try a new control module according to Replacing the control module Removal and Replacement.
Select "Continue" when the component has been replaced.
Continue - Verification
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Verification
Hint: After carrying out the repair check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Use the Activation function to activate the pump motor.
Check that the pump motor starts and operates normally.
Is the pump OK?
Yes - FAULT FOUND
No - Fault-tracing information
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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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Connecting breakout box and checking ground terminals
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Status check
- Ignition off.
- Ignition on.
- Use the Activation function to activate the pump motor.
Check that the pump motor starts and operates normally.
Is the pump OK?
OK - Fault-trace according to Fault in circuit. Intermittent fault Fault In Circuit. Intermittent Fault.
Not OK - Fault-trace according to Fault in circuit. Permanent fault Fault In Circuit. Permanent Fault.
OK - INT
Not OK - PER
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PER
Electrical or mechanical fault. Permanent fault
No Fault Found - No Fault Found
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INT
Electrical or mechanical fault Intermittent fault
Check leads and connections
Check the pump motor and pump motor connector for contact resistance and oxidation Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the leads between the pump motor and the pump motor connector for intermittent break as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and intermittent short-circuiting to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the cable between the battery and control module #25 for intermittent breaks as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Select Continue when the fault has been repaired
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Check leads and connections
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No Fault Found - No Fault Found
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