Part 2
Reading off diagnostic trouble codes (DTCs), combined instrument panel (Continued)
Fault-tracing information
- The fault was probably caused by loose connections in connectors or wiring. Check the Volvo Scan Tool (ST), adapter box, wiring and data link connector (DLC) for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Replacing component
Try a new Volvo Scan Tool (ST).
Continue - Verification
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Checking wiring
- Ignition off.
- Disconnect Volvo Scan Tool (ST).
- Disconnect wiring 1/6 meters.
Connect an ohmmeter between the 16-pin and 25-pin connectors according to the table below:
The ohmmeter should read 0 ohms in all readings.
OK - Checking for a short-circuit in the wiring
Not OK - Replacing component
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Checking for a short-circuit in the wiring
- Ignition off.
- Wiring 1/6 meters disconnected.
To find a short-circuit, all terminals/wires in the cable must be checked for a short-circuit to each other. Take readings in the 16-pin connector.
Connect an ohmmeter between the 16-pin connector terminal pins:
- #1 and the other terminals
- #2 and the other terminals
Take readings for the other terminals in the same way.
The ohmmeter should read infinite resistance for all readings.
OK - Checking communication with other diagnostic systems
Not OK - Replacing component
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Checking communication with other diagnostic systems
- Ignition off.
- Connect Volvo Scan Tool (ST) to the adapter box and wiring.
- Connect Volvo Scan Tool (ST) to the data link connector (DLC) and turn on the power supply using the switch on the adapter box.
- Ignition on.
Try to establish communication with the ABS control module by reading off diagnostic trouble codes (DTCs).
Has communication been established?
Yes - Fault-tracing information
No - Replacing component
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Replacing component
Try a new Volvo Scan Tool (ST) and adapter box.
Continue - Verification
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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 communication with ABS system by reading the stop (brake) lamp switch status.
Has communication with the ABS system been established?
Yes - Checking the combined instrument panel
No - Checking communication cable to data link connector (DLC)
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Checking the combined instrument panel
- Start engine.
Check that the tachometer is working.
Is the tachometer working?
Yes - Checking for an open-circuit
No - Checking 15-supply before fuse
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Checking for an open-circuit
Check cable between data link connector (DLC) terminal 7 and combined instrument panel #B4 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 15-supply before fuse
- Ignition on.
- Remove fuse 11/2.
Connect a voltmeter between the rear output (positive side) on the fuse holder of fuse 11/2 and ground.
The voltmeter should read approximately battery voltage.
OK - Connecting the breakout box
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check cable between the rear output (positive side) on the fuse holder to fuse 11/2 and the battery for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check function of overload relay 2/31 and ignition switch.
Continue - Verification
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Connecting the breakout box
- Ignition off.
- Reinstall fuse 11/2
- Connect breakout box according to Connecting the breakout box Connecting the Breakout Box.
Was ground terminal OK?
Yes - Checking 15 supply to combined instrument panel
No - Corrective action
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Corrective action
Remedy fault if not already carried out.
Then select continue.
Continue - Verification
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Checking 15 supply to combined instrument panel
- Ignition off.
- Connect combined instrument panel.
- Ignition on.
Connect a voltmeter between #15 (#A15) and #18 (#A18) on the breakout box.
The voltmeter should read approximately battery voltage.
OK - Checking fuse on combined instrument panel connection plate
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check cable between the rear output (positive side) on the fuse holder to fuse 11/2 and combined instrument panel #A18 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 fuse on combined instrument panel connection plate
- Ignition off.
Check fuse on combined instrument panel connection plate according to Replacing fuse Replacing Fuse.
Was the fuse defective?
Yes - Checking for a short-circuit and replacing component
No - Fault cause and checking for contact resistance and oxidation
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Checking for a short-circuit and replacing component
Check circuit after fuse on the connection plate for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Replace fuse and reinstall combined instrument panel according to Replacing fuse Replacing Fuse.
Continue - Verification
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Fault cause and checking for contact resistance and oxidation
The cause of the fault has been loose connections in the combined instrument panel connectors. Check combined instrument panel connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking communication cable to data link connector (DLC)
- Ignition off.
- Connect breakout box according to Connecting the breakout box Connecting the Breakout Box.
Connect an ohmmeter between data link connector (DLC) terminal 7 and #34 (#B4) on the breakout box.
The ohmmeter should read approximately 0 ohms.
OK - Checking the communication cable
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check cable between data link connector (DLC) terminal 7 and combined instrument panel #B4 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 combined instrument panel.
- Ignition on.
Connect a voltmeter between data link connector (DLC) terminal 7 and ground.
The voltmeter should read approximately 911V.
OK - Checking communication with the combined instrument panel
Low - Checking for a short-circuit to ground
High - Checking for a short-circuit to supply voltage
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Checking for a short-circuit to ground
Check cables 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 - Verification
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Checking for a short-circuit to supply voltage
Check cables between data link connector (DLC) terminal 7 and 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 - Verification
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Checking communication with the combined instrument panel
- Start engine.
- Go into rolling values.
Read off engine speed (RPM).
Has communication been established with the combined instrument panel?
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 cause of the fault has been loose connections in the data link connector (DLC) and/or combined instrument panel connectors.
Check data link connector (DLC) and combined instrument panel connectors for contact resistance and oxidation and remedy according to 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.
- Combined instrument panel connected.
- Ignition on.
- Volvo Scan Tool (ST) connected to data link connector (DLC).
Try to establish communication with the combined instrument panel.
Has communication been established with the combined instrument panel?
Yes - Troubleshooting procedure complete
No - Fault-tracing information
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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 communication problems is now finished.
Do you want to try establishing communication again?
YES - Reading off diagnostic trouble codes (DTCs)
NO - Exit fault-tracing
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