Checking Communication
Checking communication
Checking the power seat functions
Try to operate the seat with the control buttons.
Are power seat controls working?
Yes - Checking version
No - Fault-tracing information
Carry out next fault-tracing in accordance with Symptom Table.
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Checking version
Does the car have a chassis number in the range 267000 - 273594 (4-door) or in the range 171000 - 177545 (5-door)?
Yes - Replace component
No - Checking power supply and the Volvo Scan Tool (ST)
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Replace component
Cars in this chassis number range have the control module diagnostics function disabled. The control module operates normally when the seat is being operated but cannot be used for communication.
Replace with new control module according to Control module, replace.
In addition the diagnostics lead might not be connected up to the control module although the lead itself is there. Connect the diagnostics lead to position 4 in the connector A to enable communication.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking communication with another system
- Ignition on.
- Volvo Scan Tool (ST) connected to data link connector (DLC).
Try to establish contact with the Anti-lock braking system (ABS) by reading diagnostic trouble code (DTC).
Was contact established?
Yes - Checking for an open-circuit
No - Checking diagnostics wiring to data link connector (DLC)
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Checking for an open-circuit
Check wiring between data link connector (DLC) position 7 and control module 4-pin connector A, position 4, for open-circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking diagnostics wiring to data link connector (DLC)
- Ignition OFF.
- Disconnect Volvo Scan Tool (ST) from data link connector (DLC).
Connect an ohmmeter between data link connector (DLC) position 7 and control module 4-pin connector A, position 4.
The ohmmeter should read 0 ohms.
OK - Checking communications wiring
Not OK - Checking for an open-circuit
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Checking communications wiring
- Ignition OFF.
- Connect seat control module.
- Ignition on.
Connect a voltmeter between data link connector (DLC) position 7 and ground.
The voltmeter should read approx. 9-11 V.
OK - No Fault Found
Low - Checking for a short-circuit to ground
High - Checking for short-circuit to supply
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Checking for a short-circuit to ground
Check cable between data link connector (DLC) position 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.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking for short-circuit to supply
Check cable 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.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Verification
Verification
Hint: Check that the fault is corrected after repair as follows.
- Ignition on.
- Reconnect components, connectors etc.
Try to establish contact with the ABS system by reading off DTC.
Has contact been established?
Yes - VERIFIED
No - 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 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 - Checking version
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Fault-tracing information
The result shows that there is no point in continuing the tests.
Continue with fault-tracing of supply voltage to control module.
Press "Continue".
Continue - ANOTHER TEST
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Checking communication equipment
Checking power supply
- Ignition ON.
Connect Volvo Scan Tool (ST) to data link connector (DLC) on the car and turn on the power to the Scan Tool.
Check the Volvo Scan Tool (ST) display.
Is the display active?
Yes - Checking cabling
No - Checking supply to data link connector (DLC)
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Checking supply to data link connector (DLC)
- Ignition OFF.
- Disconnect Volvo Scan Tool (ST) and remove connector from data link connector (DLC).
Connect a voltmeter between data link connector (DLC) position 16 and ground.
Voltmeter should read battery voltage.
OK - Checking power ground to data link connector (DLC)
Not OK - Checking fuse and wiring
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Checking fuse and wiring
Check fuse and wiring between data link connector (DLC) terminal 16 and the positive terminal on the battery for open-circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and short-circuit to ground in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
For more information on the circuit see the respective Wiring diagrams for the car and model year being tested.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking power ground to data link connector (DLC)
- Ignition OFF.
Connect ohmmeter between data link connector (DLC) position 4 and ground.
The ohmmeter should read 0 ohms.
OK - Checking signal ground to data link connector (DLC)
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check wiring between data link connector (DLC) position 4 and ground point for open-circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking signal ground to data link connector (DLC)
- Ignition OFF.
Connect ohmmeter between data link connector (DLC) position 5 and ground.
The ohmmeter should read 0 ohms.
OK - Checking supply to break-out box/adapter
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check wiring between data link connector (DLC) position 5 and ground point for open-circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
For more information on the circuit see the respective Wiring diagrams for the car and model year being tested.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking supply to break-out box/adapter
- Ignition ON.
- Volvo Scan Tool (ST) connected to data link connector (DLC).
- Disconnect adapter cable to Volvo Scan Tool (ST) from adapter box.
Connect a voltmeter between ground and the 25-pin connector position:
- 15 (data link connector (DLC) side)
- 20 (data link connector (DLC) side)
- 21 (data link connector (DLC) side)
- 22 (data link connector (DLC) side)
The voltmeter should read battery voltage in all cases.
OK - Checking power ground to break-out box/adapter
Not OK - Replace the adapter cable
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Replace the adapter cable
Try a new adapter cable to Volvo Scan Tool (ST)
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking power ground to break-out box/adapter
- Ignition OFF.
- Connect Volvo Scan Tool (ST) adapter cable to data link connector (DLC).
- Disconnect cable from adapter box.
Connect an ohmmeter between ground and 25-pin connector position:
- 23 (data link connector (DLC) side)
- 24 (data link connector (DLC) side)
- 25 (data link connector (DLC) side)
The ohmmeter should read 0 ohms in all cases.
OK - Checking signal ground
Not OK - Replace the adapter cable
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Checking signal ground
- Ignition OFF.
- Connect adapter cable to data link connector (DLC).
- Disconnect cable from adapter box.
Connect an ohmmeter between the 25-pin connector position 14 (data link connector (DLC) side) and ground.
The ohmmeter should read 0 ohms.
OK - Checking power supply to the Volvo Scan Tool (ST).
Not OK - Replace the adapter cable
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Checking power supply to the Volvo Scan Tool (ST).
- Ignition ON.
- Connect Scan Tool (ST) adapter cable to data link connector (DLC).
- Connect Volvo Scan Tool (ST) to the adapter box.
- Disconnect the 3-pin connector.
- Check that the adapter box power switch is turned ON.
Connect a voltmeter between the 3-pin connector and position:
- 1 (data link connector (DLC) side) and ground
- 3 (data link connector (DLC) side) and ground
The voltmeter should read 7-9 V between 1 and ground and battery voltage between 3 and ground.
OK - Checking ground to the Volvo Scan Tool (ST)
Not OK - Replace component
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Replace component
Try a new adapter box.
Press "Continue" when the fault has been remedied.
Continue - Verification
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Checking ground to the Volvo Scan Tool (ST)
- Ignition OFF.
- Connect the Volvo Scan Tool (ST) adapter cable to the data link connector (DLC).
- Disconnect 3-pin connector from Volvo Scan Tool (ST).
Connect an ohmmeter between the 3-pin connector position 2 (data link connector (DLC) side) and ground.
The ohmmeter should read 0 ohms.
OK - Checking power supply
Not OK - Replace component
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Checking power supply
- Ignition ON.
Connect Volvo Scan Tool (ST) to data link connector (DLC) on the car and turn on the power to the Scan Tool.
Check the Volvo Scan Tool (ST) display.
Is the display active?
Yes - No Fault Found
No - Replace component
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Replace component
Try a new Volvo Scan Tool (ST).
Press "Continue" when the fault has been remedied.
Continue - Verification
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Verification
VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Attempt New Test - Attempt New Test
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Checking cabling
- Ignition OFF.
- Disconnect Volvo Scan Tool (ST).
- Disconnect 1/6 meter adapter cable.
Connect an ohmmeter between the 16-pin connector and the 25-pin connector in accordance with the table below
The ohmmeter should read 0 ohms for all readings.
OK - Checking short-circuit in adapter cable
Not OK - Replace the adapter cable
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Checking short-circuit in adapter cable
- Ignition OFF.
- Disconnect 1/6 meter adapter cable.
To determine if there is a short-circuit in the cable each position/lead must be checked for short-circuit to each other. The measurements must be carried out in the 16-pin connector.
Connect an ohmmeter between the 16-pin connector position:
- 1 and the other positions
- 2 and the other positions
Continue taking measurements in this way with the other positions.
The ohmmeter should read infinite resistance for all readings.
OK - Checking communication with another system
Not OK - Replace the adapter cable
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Checking communication with another system
- Ignition OFF.
- Connect Volvo Scan Tool (ST) with adapter and adapter cable.
- Connect Volvo Scan Tool (ST) to data link connector (DLC)) on the car and turn on the power to the Scan Tool.
- Ignition ON.
Try to establish contact with the Anti-lock braking system (ABS) by reading diagnostic trouble code (DTC).
Was contact established?
Yes - No Fault Found
No - Replace component
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Replace component
Try a new Volvo Scan Tool (ST) and adapter box
Press "Continue" when the fault has been remedied.
Continue - Verification
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Attempt New Test - Checking the power seat functions
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