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Home >> Volvo >> 2000 >> S40 L4-1.9L Turbo VIN 25 B4204T2 >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> ABS Codes (Antilock Brake System Control Module) >> ABS-441 >> Power Supply Valves. Signal Missing. Permanent Fault >> Signal Missing. Permanent Fault

Signal Missing. Permanent Fault






Signal missing. Permanent fault

Checking fuse number 12 (50 A) in the engine compartment




- Ignition off.
Check that fuse no. 12 (50 A) in the engine compartment is intact.









Is the fuse OK?

Yes - Checking the voltage

No - Checking for a short-circuit

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Checking the voltage




- Ignition off.
Connect a voltmeter between ground (0 Volts) and the rear socket on the fuse holder (windshield side) for fuse no. 12 (50 A) in the integrated relay / fuse box in the engine compartment.









The voltmeter should read approximately battery voltage.

OK - Checking the 30-supply to the control module
Connecting the breakout box

Not OK - Checking for an open-circuit

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Checking for a short-circuit
Check the cable between fuse no. 12 (50 A) and control module connector terminal # 18. Check for a short-circuit to ground, Section 5 (50-59), Brakes, 1996-.
Replace fuse 12 (50 A).

Other information
- Checking wiring and terminals Checking Wiring And Terminals










Continue - Verification

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Connecting the breakout box





Connecting the breakout box
951 1426 31-pin adapter 951 1426 31-Pin Adapter 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Connecting the breakout box to the ABS control module





Is the breakout box connected to the ABS control module?

Yes - FAULT FOUND

No - Connecting the breakout box

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Connecting the breakout box








- Ignition off.
- Disconnect the ABS control module.
- Check the control module and the control module connector to ensure that:
The male and female terminals are undamaged and properly attached (cannot be pressed in).
The wiring for the female terminals are securely connected.
Check in particular those terminals that are relevant to the stored diagnostic trouble code (DTC) / symptoms.
Connect adapter 951 1426 31-pin adapter 951 1426 31-Pin Adapter to the control module connector (wiring side). Connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to the adapter.

Note! ABS control module terminals 1-40 correspond to terminals 1-40 on the breakout box.





Select Continue.

Continue - Checking the ground terminal

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Checking the ground terminal




- Ignition off.
- Switch of all power consuming components, such as the passenger compartment lighting and the radio.
Connect an ohmmeter between terminal 16 on the breakout box and the battery negative terminal.









The ohmmeter should read approximately 0 ohms.

OK - No Fault FoundFault-tracing information

Not OK - Checking for an open-circuit and contact resistance

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Checking for an open-circuit and contact resistance
Check ground terminal 31/2. Check the cable between ground terminal 31/2 and control module terminal 16 for:
an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
contact resistance according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the ground lead between the battery and the bodywork for:
an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
contact resistance according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.













Select "Continue" when the fault has been remedied.

Continue - Verification
Verification

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Verification




Verification

Verification

Hint: Check after repair that the fault has been rectified.
Proceed as follows:




- Switch off the ignition.
- Switch off all power consuming components such as the courtesy lighting and the radio.








- Connect an ohmmeter between terminal 16 on the breakout box and the battery negative terminal.

The ohmmeter should read approximately 0ohms.

OK - VERIFIED

Not OK - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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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

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Attempt New Test - Connecting the breakout box

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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FAULT FOUND - Checking the 30-supply to the control module

No Fault Found - Checking the 30-supply to the control module

FAULT-TRACING FAILED - Checking the 30-supply to the control module

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Checking the 30-supply to the control module








- Ignition off
- Connect the breakout box. Check the ground terminal. See: Connecting the breakout box
- Reconnect the control module.
Connect a voltmeter between terminals #19 (0 Volts) and #18 on the breakout box.









The voltmeter should read approximately battery voltage.

OK - Checking the function of the ABS hydraulic modulator

Not OK - Checking for an open-circuit

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Checking for an open-circuit
Check the circuit before fuse no. 12 (50 A). Check for an open-circuit, Section 5 (50-59), Brakes, 1996-.
For information of the circuit before fuse no. 12 (50 A), see Service Manual Section 3 (39) Wiring diagrams.

Other information
- Checking wiring and terminals Checking Wiring And Terminals









Select "Continue" when the fault has been remedied.

Continue - Verification

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Checking the function of the ABS hydraulic modulator








- Ignition off
- Reinstall the connectors, components, etc.
Test drive the car at a speed above 6 km/h or 15 km/h. The control module will run a valve and pump motor test at 6 km/h.
Stop the car. Do not switch off the ignition.
Connect VCT2000.
Read off the diagnostic trouble code (DTC) status.









Is the status permanent?

Yes - Replacing the component

No - Checking for contact resistance and oxidation

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Checking for an open-circuit
Check the cable between control module connector terminal # 18 and fuse no. 12 (50 A). Check for an open-circuit, Section 5 (50-59), Brakes, 1996-.

Other information
- Checking wiring and terminals Checking Wiring And Terminals









Select "Continue" when the fault has been remedied.

Continue - Verification

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Replacing the component
Try a new control module, Section 5 (50-59), Brakes, 1996-: Replacing the ABS control module Replacing The ABS Control Module





Select "Continue" when the fault has been remedied.

Continue - Verification

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Checking for contact resistance and oxidation
- The cause of the diagnostic trouble code (DTC) was poor contact in the control module connector or the fuse holder for fuse no. 12 (50 A).
Check the control module connector and the fuse holder. Check for contact resistance and oxidation. Remedy, Section 5 (50-59), Brakes, 1996-.

Other information
- Checking wiring and terminals Checking Wiring And Terminals






Continue - Verification

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Verification




Verification

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




- Ignition off.
- Reinstall the connectors, components etc.
Test drive the car at a speed above 6 km/h. The control module tests the valves and pump motor when speed exceeds 6 km/h.
Stop the car. Do not switch off the ignition.
Connect VCT 2000
Read off the diagnostic trouble code (DTC) status.









Is the status permanent?

Yes - VERIFICATION FAILEDPAPER

No - VERIFIED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - 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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Attempt New Test - ???

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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