Part 1

Reading off Motronic 4.4 diagnostic trouble codes (DTCs)

Query

Connecting

Connecting the Volvo Scan Tool (ST)
The Volvo Scan Tool (ST) must be connected to the VIDA PC and data link connector (DLC) in the passenger compartment.

Is the Volvo Scan Tool (ST) connected and switched on?

Yes - Reading off diagnostic trouble codes (DTCs)

N - Connecting the Volvo Scan Tool (ST)

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Connecting the Volvo Scan Tool (ST)

- Ignition off.
Install the blue memory cassette in the Volvo Scan Tool (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 the VIDA communication cable between the adapter and the VIDA PC.
Connect the cable from the Volvo Scan Tool (ST) (P/N 951 1458 Scan tool cable 6 meters 951 1458 Scan Tool Cable 6 Meters ) to the data link connector (DLC) in the passenger compartment.
Power up the Volvo Scan Tool (ST).

Continue - Reading off diagnostic trouble codes (DTCs)

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Reading off diagnostic trouble codes (DTCs)

- Start the engine and allow to idle or turn engine over using starter motor for approximately 10 seconds.

Note! Do not turn the ignition key back to the OFF position before diagnostic trouble codes (DTCs) have been read off.

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

Numeric Result 0 - FAULT FOUND

Numeric Result -8 - Communication failure

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.

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Communication problems with Volvo Scan Tool (ST)

Starting the engine

- Start the engine with the key.

Does the engine start?

Yes -

No -

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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 -

No -

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Checking data link connector (DLC) power supply

- Ignition off.
- Disconnect the Volvo Scan Tool (ST)
- Disconnect the data link connector (DLC).

- Connect a voltmeter between data link connector (DLC) terminal 16 and ground.

The voltmeter should read battery voltage.

OK -

Not OK -

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Checking fuse 15
- Check that fuse 15 is intact.

Is the fuse intact?

Yes -

No -

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Checking for a short-circuit

- Check cable between data link connector (DLC) terminal 16 and fuse 15 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - FAULT FOUND

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Checking voltage before the fuse

- Ignition off.

- Connect a voltmeter between the rear socket of the fuse holder to fuse 15 and ground.

The voltmeter should read battery voltage.

OK -

Not OK -

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Checking for an open-circuit

- Check cable between fuse 15 and data link connector (DLC) terminal 16 for an open-circuit Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - FAULT FOUND

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Checking for an open-circuit

- Check cable between fuse 15 and battery positive terminal for an open-circuit Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - FAULT FOUND

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Checking power ground to the data link connector (DLC)

- Ignition off.

- Connect ohmmeter between data link connector (DLC) terminal 4 and ground.

The ohmmeter should read approximately 0 ohms.

OK -

Not OK -

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Checking for an open-circuit

- Check cable between data link connector (DLC) terminal 4 and ground terminal (31/15) by the passenger side A-post for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - FAULT FOUND

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Checking data link connector (DLC) signal ground

- Ignition off.

- Connect ohmmeter between data link connector (DLC) terminal 5 and ground.

The ohmmeter should read approximately 0 ohms.

OK -

Not OK -

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Checking for an open-circuit

- Ignition on.
- Volvo Scan Tool (ST) connected to data link connector (DLC).
- Split Volvo Scan Tool (ST) cabling at adapter box.
Connect a voltmeter between 25-pin connector terminal:
- 15 (data link connector (DLC) side) and ground
- 20 (data link connector (DLC) side) and ground
- 21 (data link connector (DLC) side) and ground
- 22 (data link connector (DLC) side) and ground

The voltmeter should read battery voltage for all readings.

OK -

Not OK -

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Fault-tracing information
- Try new Volvo Scan Tool (ST) wiring.

Continue - FAULT FOUND

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Checking power ground to the adapter box

- Ignition off.
- Connect Volvo Scan Tool (ST) wiring to data link connector (DLC).
- Volvo Scan Tool (ST) cabling disconnected from adapter box.
Connect an ohmmeter between the 25-pin connector terminal:
- 23 (data link connector (DLC) side) and ground
- 24 (data link connector (DLC) side) and ground
- 25 (data link connector (DLC) side) and ground

The ohmmeter should read 0 ohms for all readings.

OK -

Not OK -

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Fault-tracing information
- Try new Volvo Scan Tool (ST) wiring.

Continue - FAULT FOUND

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Checking adapter box signal ground

The ohmmeter should read 0 ohms.

OK -

Not OK -

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Fault-tracing information
- Try new Volvo Scan Tool (ST) wiring.

Continue - FAULT FOUND

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Checking supply voltage to Volvo Scan Tool (ST)

- Ignition on.
- Connect Volvo Scan Tool (ST) wiring to data link connector (DLC).
- Connect Volvo Scan Tool (ST) to adapter box.
- Disconnect 3-pin connector from Volvo Scan Tool (ST).
- Power switch on adapter box should be on.
Connect a voltmeter between 3-pin connector terminal:
- 1 (data link connector (DLC) side) and ground
- 3 (data link connector (DLC) side) and ground

The voltmeter should read: 1 and ground: 7 - 9 V. 3 and ground: battery voltage.

OK -

Not OK -

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Fault-tracing information
- Try a new adapter box.

Continue - FAULT FOUND

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Checking ground to Volvo Scan Tool (ST)

- Ignition off.
- Connect Volvo Scan Tool (ST) wiring to data link connector (DLC).
- Disconnect 3-pin connector from Volvo Scan Tool (ST).

- Connect an ohmmeter between the 3-pin connector terminal 2 (data link connector (DLC) side) and ground

The ohmmeter should read 0 ohms.

OK -

Not OK -

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Fault-tracing information
- Try a new Volvo Scan Tool (ST).

Continue - FAULT FOUND

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Fault-tracing information
- Try a new adapter box.

Continue - FAULT FOUND

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Checking communication with the ABS system

- Ignition on.
- Volvo Scan Tool (ST) connected to data link connector (DLC).

- Try to establish contact with the ABS system.

Has communication with the ABS system been established?

Yes -

No -

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Checking for an open-circuit

- Check cable between data link connector (DLC) terminal 7 and Motronic 4.4 engine control module (ECM) #B36 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - FAULT FOUND

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Checking communication cable to data link connector (DLC)

- Disconnect the immobilizer and bridge it to the car with jumper P/N 9162590.
- Ignition off.

- Connect an ohmmeter between data link connector (DLC) terminal 7 and breakout box terminal #36 (B36).

The ohmmeter should read 0 ohms.

OK -

Not OK -

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Checking for an open-circuit

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

The voltmeter should read approximately 9-11 V.

OK -

Low -

High -

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Checking for a short-circuit

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

Continue - FAULT FOUND

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Checking for a short-circuit

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

Continue - FAULT FOUND

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Checking communication cable to adapter box

- Ignition on.
- Connect Volvo Scan Tool (ST) to data link connector (DLC).
- Separate Scan Tool (ST) wiring at the adapter box.

- Connect an ohmmeter between the 25-pin connector terminal 5 (data link connector (DLC) side) and ground.

The voltmeter should read 9-11 V.

OK -

Not OK -

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Replacing component
- Try new Volvo Scan Tool (ST) wiring.

Continue - FAULT FOUND

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Checking communication with the Volvo Scan Tool (ST)

- Ignition on.
- Connect Volvo Scan Tool (ST) wiring to data link connector (DLC).
- Connect Volvo Scan Tool (ST)) wiring to the adapter box.
- Disconnect 62-pin connector from Volvo Scan Tool (ST).
- Check that the switch on the adapter box is on.

- Connect a voltmeter between the 62-pin connector terminal 47 (Volvo Scan Tool (ST) side) and ground.

The voltage should be approximately 8.6 V.

OK -

Not OK -

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Checking communication with the Volvo Scan Tool (ST), continued

- Ignition on.

- Try to establish communication with the Motronic 4.4 engine control module (ECM).

The voltage should oscillate rapidly between 8.6 V and 0 V when the Volvo Scan Tool (ST) tries to establish contact.

OK -

Not OK -

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