Short-Circuit Or Capacitance Too High
Short-circuit or capacitance too high
Checking diagnostic trouble code (DTC) and type of fault
Hint: Before starting to remove components, the Volvo Scan Tool (ST) should be used to check whether the fault is permanent or intermittent.
Clear diagnostic trouble code (DTC).
Continue - Checking diagnostic trouble code (DTC) and type of fault, continuation
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Checking diagnostic trouble code (DTC) and type of fault, continuation
- Wait at least 10 seconds.
Read off diagnostic trouble code (DTC).
Diagnostic trouble code (DTC) SRS-241 cannot be cleared if the fault is permanent.
Can the DTC be erased?
Yes - Diagnostic trouble code (DTC) could be cleared
No - Disconnecting connector from pyrotechnical seat belt tensioner
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Diagnostic trouble code (DTC) could be cleared
The fault is not permanent. The fault could be intermittent. Attempt to provoke the intermittent fault at every step of the fault tracing process by shaking connectors and cabling while taking readings.
Continue - Disconnecting connector from pyrotechnical seat belt tensioner
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Disconnecting connector from pyrotechnical seat belt tensioner
Disconnecting connector from pyrotechnical seat belt tensioner
Disconnecting connector from pyrotechnical seat belt tensioner
- Make a note of radio code if anti-theft coded radio installed.
- Ignition off.
- Disconnect battery negative lead.
- Remove left/right B-pillar in accordance with Seat-belt tensioners, replacement Seat-Belt Tensioners, Replacement.
- Disconnect seat belt tensioner connector.
Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed pyrotechnical seat belt tensioner. This could deploy the seat belt tensioner!
Continue - CONTINUE
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Continue - Verification
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Checking DTCs with the seat belt tensioner replaced by special tool 998 8695
- Connect special tool 998 8695 TEST DEVICE 998 8695 Test Device to SRS ignition cable igniter connector.
Caution! The special tool should be checked and faultless. If the tool is defective it will cause errors in the diagnosis and make fault tracing harder.
- Ignition on.
- Connect battery negative lead.
Clear diagnostic trouble code (DTC).
Continue - Checking DTCs with the seat belt tensioner replaced by special tool 998 8695, continuation
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Checking DTCs with the seat belt tensioner replaced by special tool 998 8695, continuation
- Wait at least 10 seconds.
Read off diagnostic trouble code (DTC).
Diagnostic trouble code (DTC) SRS-241 can be cleared if the fault is in the disconnected seat belt tensioner.
Can the DTC be erased?
Yes - Connecting connector to pyrotechnical seat belt tensioner
No - Checking SRS ignition cable resistance
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Connecting connector to pyrotechnical seat belt tensioner
Connecting connector to pyrotechnical seat belt tensioner
Connecting connector to pyrotechnical seat belt tensioner
- Ignition off.
- Disconnect battery negative lead.
- Remove special tool 998 8695 TEST DEVICE 998 8695 Test Device.
- Connect connector to seat belt tensioner.
Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed pyrotechnical seat belt tensioner. This could deploy the seat belt tensioner!
Continue - CONTINUE
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CONTINUE - Checking diagnostic trouble code (DTC) with the seat belt tensioner connected
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Checking diagnostic trouble code (DTC) with the seat belt tensioner connected
- Ignition on.
- Connect battery negative lead.
- Wait at least 10 seconds.
Read off diagnostic trouble code (DTC).
Diagnostic trouble code (DTC) SRS-241 should be stored if the fault is in the seat belt tensioner.
Is the diagnostic trouble code (DTC) displayed?
Yes - Replacing component
No - Disconnecting connector from pyrotechnical seat belt tensioner
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Replacing component
The short-circuit is in the seat belt tensioner.
- Replace right seat belt tensioner in accordance with Seat-belt tensioners, replacement Seat-Belt Tensioners, Replacement.
Continue - FAULT FOUND
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Disconnecting connector from pyrotechnical seat belt tensioner
Disconnecting connector from pyrotechnical seat belt tensioner
Disconnecting connector from pyrotechnical seat belt tensioner
- Make a note of radio code if anti-theft coded radio installed.
- Ignition off.
- Disconnect battery negative lead.
- Remove connector from the seat belt tensioner.
Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed pyrotechnical seat belt tensioner. This could deploy the seat belt tensioner!
- Connect special tool 998 8695 TEST DEVICE 998 8695 Test Device.
Continue - CONTINUE
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CONTINUE - Checking SRS ignition cable resistance
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Checking SRS ignition cable resistance
- Ignition off.
- Disconnect battery negative lead.
- Remove glove compartment in accordance with Passenger module, replacement Passenger Module, Replacement.
- Remove socket housing B from connector 24/4.
Connect an ohmmeter between connecting socket terminals 17 and 18 in socket housing B.
Caution! Take care not to damage connecting sockets.
The ohmmeter should read infinite resistance.
Is the value OK?
OK - Checking resistance in the ignition cabling and sensor module
Not OK - The readings are abnormal
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The readings are abnormal
When the ohmmeter reads approx. 0 ohms there is a short circuit in the SRS ignition cable between connector 24/4 and the igniter connector.
When the ohmmeter reads approx. 2-3 ohms there is a short circuit in the capacitor in the SRS ignition cable igniter connector.
- Replace SRS cable harness.
Continue - FAULT FOUND
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Checking resistance in the ignition cabling and sensor module
- Remove pin housing B from connector 24/4.
- Ignition off.
Connect an ohmmeter between connecting pin terminals 17 and 18 in pin housing B.
Caution! Take care not to damage connector pins.
The ohmmeter should read approx. 47 kohms.
Is the value OK?
OK - Replacing component
Not OK - Checking SRS ignition cable resistance
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Replacing component
SRS ignition cable between connector 24/4 and sensor module is OK. There is a short circuit in the SRS ignition cable between connectors or 24/4 and the igniter connector.
- Replace SRS cable harness.
Continue - FAULT FOUND
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Checking SRS ignition cable resistance
- Ignition off.
- Expose and remove the SRS sensor module connector according to: Replacing the SRS sensor module Service and Repair
Caution! Never touch the sensor module pins. There is a risk of static discharge which could damage the sensor module.
- Connect an ohmmeter between connecting pin terminals 17 and 18 in pin housing B.
Caution! Take care not to damage connector pins.
- The ohmmeter should read infinite resistance.
Is the value OK?
OK - Replacing component
Not OK - Replacing component
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Replacing component
SRS ignition cable between connectors 24/4 and sensor module is OK.
- Replace the sensor unit according to: Replacing the SRS sensor module Service and Repair
Continue - FAULT FOUND
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Replacing component
When the ohmmeter reads approx. 0 ohms there is a short circuit in the SRS ignition cable between connector 24/4 and the sensor module.
- Replace SRS cable harness.
Continue - FAULT FOUND
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