Part 2
Reading DTCs. SRS (Continued)
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
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 - 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 supply
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Checking for an open-circuit
Check the cable between data link connector (DLC) terminal 5 and ground terminal 31/15 for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - FAULT FOUND
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Checking communication with another control module
- Ignition off.
- Connect Volvo Scan Tool (ST) to data link connector (DLC).
- Ignition on.
Try to establish contact with another on-board diagnostic (OBD) system, the ABS system.
Does communication with another on-board diagnostic (OBD) system work?
Yes - Checking the communication cable for open circuits to the SRS system
No - Checking to see if the communication cable is short-circuited to ground
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Checking the communication cable for open circuits to the SRS system
- Ignition off.
- Disconnect battery negative lead.
- Disconnect Volvo Scan Tool (ST) from data link connector (DLC).
- Expose and remove SRS sensor module connector in accordance with.
Caution! Never touch the sensor module pins. There is a risk of static discharge which could damage the sensor module.
Connect an ohmmeter between data link connector (DLC) terminal 7 and sensor module connector terminal 9.
The ohmmeter should read approx. 0 ohms.
OK - Checking 30 supply to the SRS sensor module
Not OK - Checking for an open circuit
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Checking for an open circuit
Check the cable between junction point 23/421 sensor module connector terminal 9 for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking to see if the communication cable is short-circuited to ground
- Ignition off.
- Make a note of radio code if anti-theft coded radio installed.
- Disconnect battery negative lead.
- Disconnect Volvo Scan Tool (ST) from data link connector (DLC).
- Expose and remove SRS sensor module connector in accordance with.
Caution! Never touch the sensor module pins. There is a risk of static discharge which could damage the sensor module.
Connect an ohmmeter between data link connector (DLC) terminal 7 and ground.
The ohmmeter should read approx. 20 kohms (or a similarly high resistance). This reading depends on the number of on-board diagnostic (OBD) systems connected to the data link connector (DLC).
OK - Checking to see if the communication cable is short-circuited to supply voltage
Not OK - Checking for short-circuit
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Checking for short-circuit
Check cable between data link connector (DLC) terminal 7 and junction point 23/421 and between junction point 23/421 and the control modules connected to that junction point for short circuit to ground in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking to see if the communication cable is short-circuited to supply voltage
- Ignition off.
- Disconnect battery positive lead.
Connect an ohmmeter between data link connector (DLC) terminal 7 and battery positive lead.
The ohmmeter should read approx. 20 kohms (or a similarly high resistance). This reading depends on the number of on-board diagnostic (OBD) systems connected to the data link connector (DLC).
OK - The cable is not short circuited to supply voltage
Not OK - Checking for short-circuit
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The cable is not short circuited to supply voltage
Check Volvo Scan Tool (ST), Volvo Scan Tool (ST) cabling and adapter box.
Continue - Verification
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Checking for short-circuit
Check cable between data link connector (DLC) terminal 7 and junction point 23/421 and between junction point 23/421 and the control modules connected to that junction point for a short circuit to supply voltage in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking 30 supply to the SRS sensor module
- Ignition on.
Caution! Never touch the sensor module pins. There is a risk of static discharge which could damage the sensor module.
Connect a voltmeter between ground and SRS sensor module connector terminal 5.
The voltmeter should read battery voltage.
OK - Replacing component
Not OK - Checking 30 supply before fuse 32
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Replacing component
There is no open circuit in the cabling.
Replace sensor module in accordance with.
Continue - Verification
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Checking 30 supply before fuse 32
- Remove fuse 32.
- Ignition on.
Connect a voltmeter between ground and fuse holder positive side for fuse 32.
The voltmeter should read battery voltage.
OK - Checking for an open circuit
Not OK - Checking overload relay signal ground
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Checking for an open circuit
Check the cable between fuse 32 and SRS sensor module connector terminal 5 for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking overload relay signal ground
- Ignition off.
- Screw off central electrical unit cover in engine compartment.
- Remove relay 105 from base.
Connect an ohmmeter between terminal 4 on relay base 105 (2/30) and ground.
The ohmmeter should read approx. 0 ohms.
OK - Checking 30 supply to the overload relay
Not OK - Checking for an open circuit
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Checking for an open circuit
Check the ground lead between relay base 105 (2/30) terminal 4 and ground for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking 30 supply to the overload relay
- Ignition off.
Connect a voltmeter between terminal 1 on relay base 105 (2/30) and ground.
The voltmeter should read battery voltage.
OK - Checking the X supply to the overload relay
Not OK - Checking for open-circuit
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Checking for open-circuit
Check the cable between relay base 105 (2/30) terminal 1 and battery positive terminal for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking the X supply to the overload relay
- Ignition on.
Connect a voltmeter between terminal 2 on relay base 105 (2/30) and ground.
The voltmeter should read supply voltage.
OK - Checking 30 supply after overload relay
Not OK - Checking the X supply from the ignition switch
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Checking 30 supply after overload relay
- Ignition off.
Connect an ohmmeter between relay base 105 (2/30) terminal 3 and fuse holder positive side for fuse 32.
The ohmmeter should read approx. 0 ohms.
OK - Replacing component
Not OK - Checking for open circuit
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Replacing component
Try using a new relay.
Continue - Verification
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Checking for open circuit
Check cable between relay base 105 (2/30) terminal 3 and fuse 32 for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Fault-tracing information
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Checking the X supply from the ignition switch
- Ignition off.
- Disconnect battery negative lead.
- Disconnect the connector from the ignition switch.
- Ignition on.
First connect an ohmmeter between terminal X and terminal 30 on the ignition switch and then between terminal X and the other terminal 30 on the ignition switch.
In both cases the ohmmeter should read approx. 0 ohms.
OK - Checking ignition switch supply
Not OK - Replacing component
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Replacing component
Replace ignition switch.
Continue - Verification
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Checking ignition switch supply
- Ignition off.
- Connect battery negative lead.
- Ignition switch connector should be disconnected.
First connect an voltmeter between terminal 30 on the ignition switch connector and ground and then between the other terminal 30 on the ignition switch connector and ground.
In both cases the voltmeter should read battery voltage.
OK - Checking for open-circuit
Not OK - Checking for open-circuit
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Checking for open-circuit
Check cable between ignition switch terminal X and relay base 105 (2/30) terminal 2 for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Checking for open-circuit
Check the cable between battery positive terminal and ignition switch terminal 30 for an open circuit in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Fault-tracing information
Fault-tracing communication problems is now finished.
Do you want to try establishing communication again?
Yes - Repeat test
No - Exit procedure
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