Reading Off Diagnostic Trouble Codes (DTCs)

Reading off diagnostic trouble codes (DTCs). ABS

Query

Connection

Connection of Volvo Scan Tool (ST)
Volvo ST must be connected to VIDA PC and vehicle to DLC in passenger compartment.

Is Volvo ST connected and switched ON?

Yes - FAULT FOUND

No - No Fault Found

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FAULT FOUND - Reading off diagnostic trouble codes (DTCs)

No Fault Found - Connecting the Volvo Scan Tool (ST):

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Connecting the Volvo Scan Tool (ST):

Connection of Volvo Scan Tool (ST)

Connection of Volvo ST

- Ignition off.
- Insert blue memory cassette into Volvo ST.
- Connect adapter 951 1457 Adaptor 951 1457 Adaptor to cable 951 1458 Scan tool cable 6 meters 951 1458 Scan Tool Cable 6 Meters.
- Connect VIDA communication lead between the adapter and the VIDA PC.

Continue - Connection to DLC

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Connection to DLC
- Connect Volvo ST cable (p/n) 951 1458 Scan tool cable 6 meters 951 1458 Scan Tool Cable 6 Meters to the DLC in passenger compartment.
- Switch on Volvo ST.

Press Continue.

Continue - DONE

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DONE - Reading off diagnostic trouble codes (DTCs)

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Reading off diagnostic trouble codes (DTCs)

- Ignition on.

- Select the Volvo Scan Tool (ST) symbol to read off diagnostic trouble codes (DTCs).

Numeric Result 0 - DONE

Numeric Result -8 - Communication problems

Numeric Result -1 - Communication problems

Numeric Result -2 - Communication problems

Numeric Result -3 - Communication problems

Numeric Result -4 - Communication problems

Numeric Result -5 - Communication problems

Numeric Result -6 - Communication problems

Numeric Result -7 - Communication problems

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Communication problems
Communication interrupted for one of the following reasons:
- A cable has come loose
- Volvo Scan Tool (ST) is switched off
- A communication problem has occurred in the VIDA application
- Check that the adapter is correctly connected to the Volvo Scan Tool (ST).
- Check that the VIDA-wiring between the adapter box and the VIDA- station is correctly connected.
- Check that the signal cable is correctly connected to the battery and Volvo Scan Tool (ST).
- Make sure that the correct memory cassette is inserted the Volvo Scan Tool (ST).
- Check that the switch on the adapter box is ON.

Hint: If the car has an after market immobilizer installed (with a separate key) which interrupts power supply to the engine control module (ECM), the immobilizer should be deactivated with the appropriate key.

Consequent to the communication problem there is the following alternative:
1. Try again.
2. Carry out a fault-tracing for the communication problem.
3. Finish.

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Communication failure
Communication has been interrupted due to one of the following reasons:
- lead is disconnected
- ignition is switched off
- Check that lead to DCLA is properly attached.
As a result of the communication failure, the following alternatives are available:
1. Make another try.
2. Fault-trace according to communication problems.
3. Exit.

Select the appropriate alternative.

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Checking control module communication

Checking power supply

- Ignition on.
- Volvo Scan Tool (ST) connected to data link connector (DLC).
Power up the Volvo Scan Tool (ST) and check that the display lights.

Does the display light?

Yes - Connecting breakout box and checking ground terminals

No - Checking data link connector (DLC)

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Checking data link connector (DLC)
Check Volvo Scan Tool (ST), power supply, power ground and data link connector (DLC) signal ground.

OK - Verification

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Connecting breakout box and checking ground terminals

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.

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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.

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Checking supply voltage (15 supply)

- Ignition off.
- Connect control module.
- Ignition on.
Connect a voltmeter between #23 and #8 on the breakout box.

The voltmeter should read approximately battery voltage.

OK - Checking supply voltage (30 supply)

Not OK - Checking fuse 11/29

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Checking fuse 11/29
Check that fuse 11/29 is intact.

Is fuse 11/29 intact?

Yes - Checking for an open-circuit in the cable

No - Checking for a short-circuit and replacing component

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Checking for an open-circuit in the cable
Check cable between control module #23 and ignition switch terminal 15I for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - Verification

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Checking supply voltage (30 supply)

- Ignition off.
Connect a voltmeter between #9 and #8 on the breakout box.

The voltmeter should read approximately battery voltage.

OK - Checking communication cable to data link connector (DLC)

Not OK - Checking fuse

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Checking fuse
Check that fuse 11/14 is intact. (For the 850 diesel fuse 11A/4).

Is fuse 11/14 intact?

Yes - Checking for an open-circuit in the cable

No - Checking for a short-circuit and replacing component

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Checking for an open-circuit in the cable
Check cable between control module #9 and battery for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - Verification

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Checking for a short-circuit and replacing component
Check cable between control module #9 and fuse 11/14 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
(For the 850 diesel, check cable between control module #9 and fuse 11A/4 and #25 and fuse 11A/4 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Then replace the fuse.

Continue - Verification

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Checking communication cable to data link connector (DLC)

- Ignition off.
- Disconnect control module.
- Volvo Scan Tool (ST) disconnected from data link connector (DLC).
Connect an ohmmeter between data link connector (DLC) terminal 7 and #13 on the breakout box.

The ohmmeter should read 0 ohms.

OK - Checking the communication 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 data link connector (DLC) terminal 7 and transmission control module (TCM) #13 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - Verification

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Checking the communication cable

- Ignition off.
- Connect control module.
- Ignition on.
Connect a voltmeter between data link connector (DLC) terminal 7 and ground.

The voltmeter should read approximately 9-11 V.

OK - Checking communication with the ABS system

Low - Checking for a short-circuit

High - Checking for a short-circuit

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Checking for a short-circuit
Check cable between data link connector (DLC) terminal 7 and control module for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - Verification

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Checking for a short-circuit
Check cable between data link connector (DLC) terminal 7 and control module for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - Verification

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Checking communication with the ABS system

- Ignition on.
- Connect Volvo Scan Tool (ST) wiring to data link connector (DLC).
Try to establish communication with the ABS system.

Has communication with the ABS system been established?

Yes - Fault cause and checking for contact resistance and oxidation

No - Checking Volvo Scan Tool (ST)

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Fault cause and checking for contact resistance and oxidation
The reason for the fault was poor contact in the data link connector or the control module connectors. Check connectors for contact resistance and oxidation and remedy in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault

Continue - Verification

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Checking Volvo Scan Tool (ST)
Check Volvo Scan Tool (ST).

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.
- Volvo Scan Tool (ST) connected to data link connector (DLC).
Power up the Volvo Scan Tool (ST) and try to establish communication with the ABS system.

Is communication established?

Yes - Fault has been remedied

No - 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking power supply

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Fault-tracing information

Fault-tracing information
Fault-tracing communication problems is now finished.

Do you want to try establishing communication again?

Yes - Repeat Test

No - Exit Test

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