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Home >> Volvo >> 1998 >> C70 Convertible L5-2.4L Turbo VIN 56 B5254T >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> SRS Codes (Supplemental Restraint System) >> SRS-221 >> Passenger Module. Short-Circuit Or Capacitance Too High >> Short-Circuit Or Capacitance Too High

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).






Numeric Result 0 - Checking diagnostic trouble code (DTC) and type of fault, continuation

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Diagnostic trouble code (DTC) SRS 221 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 passenger module

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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).
It should not be possible to clear diagnostic trouble code (DTC) SRS-221 if the fault is permanent.





Can diagnostic trouble code (DTC) SRS-221 be cleared?

Yes - Diagnostic trouble code (DTC) SRS 221 could be cleared

No - Disconnecting connector from passenger module

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Disconnecting connector from passenger module




Disconnecting connector from passenger module

Disconnecting passenger module connector








- Make a note of radio code if anti-theft coded radio installed.
- Ignition off.
- Disconnect battery negative lead.
- Remove glove compartment in accordance with Passenger module, replacement Passenger Module, Replacement.
- Disconnect passenger module connector.

Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed passenger module. This could deploy the airbag.





Continue - CONTINUE

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Continue - Checking DTCs with the passenger module replaced by special tool 998 8695

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Checking DTCs with the passenger module 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 defect free. 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).










Numeric Result 0 - Checking DTCs with the passenger module replaced by special tool 998 8695, continuation

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Checking DTCs with the passenger module replaced by special tool 998 8695, continuation




- Ignition on.
- Wait at least 10 seconds.
Read off diagnostic trouble code (DTC).
It should be possible to clear diagnostic trouble code (DTC) SRS-221 if the fault is in the passenger module.





Can diagnostic trouble code (DTC) SRS-221 be cleared?

Yes - Installing connector to passenger module

No - Checking SRS ignition cable resistance

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Installing connector to passenger module




Installing connector to passenger module

Installing passenger module connector








- Ignition off.
- Disconnect battery negative lead.
- Remove special tool 998 8695 TEST DEVICE 998 8695 Test Device.

Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed passenger module. This could deploy the airbag!

- Connect connector to passenger module.





Continue - CONTINUE

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Continue - Verification

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Checking diagnostic trouble code (DTC) with the passenger module connected








- Ignition on.
- Connect battery negative lead.
- Wait at least 10 seconds.
Read off diagnostic trouble code (DTC).
If the fault is in the passenger module diagnostic trouble code (DTC) SRS-221 should be stored.





Is diagnostic trouble code (DTC) SRS-221 present?

Yes - Replacing component

No - Disconnecting connector from passenger module

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Replacing component
There is a short circuit in the passenger module.
- Replace passenger module in accordance with Passenger module, replacement Passenger Module, Replacement.





Continue - FAULT FOUND

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Disconnecting connector from passenger module




Disconnecting connector from passenger module

Disconnecting connector from passenger module








- Ignition off.
- Disconnect battery negative lead.
- Disconnect connector from passenger module.

Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed passenger module. This could deploy the airbag!

- Install 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.
- Disconnect connector 24/33 on SRS ignition cable.
Connect an ohmmeter between the terminal pins in the passenger module half of the connector 24/33 (part A in the figure).

Caution! Take care not to damage connecting sockets.









The ohmmeter should read infinite resistance.

OK - Checking the resistance in the SRS ignition cable, SRS cable harness and sensor module

Not OK - Replacing component

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Replacing component
If the ohmmeter reads approx. 0 ohms there is a short-circuit in the SRS ignition cable.
If the ohmmeter reads approx. 2-3 ohms there is a short circuit in the capacitor in the SRS ignition cable igniter connector.
- Replace passenger module SRS ignition cable in accordance with Passenger module, replacement Passenger Module, Replacement.

Continue - FAULT FOUND

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Checking the resistance in the SRS ignition cable, SRS cable harness and sensor module




- Ignition off.
Connect an ohmmeter between the connecting sockets in the sensor module half of the connector 24/33 (part B in the figure).

Caution! Take care not to damage connecting sockets.









The ohmmeter should read approx. 47 kohms.

OK - Replacing component

Not OK - Checking resistance in the SRS ignition cable in the SRS cable harness

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Replacing component
SRS ignition cable in the SRS cable harness between connector 24/33 and the sensor module is OK.
- Replace passenger module SRS ignition cable in accordance with Passenger module, replacement Passenger Module, Replacement.

Continue - FAULT FOUND

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Checking resistance in the SRS ignition cable in the SRS cable harness








- Ignition off.
- 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 the connecting sockets in the sensor module half of the connector 24/33 (part B in the figure).

Caution! Take care not to damage connecting sockets.













The ohmmeter should read infinite resistance.

OK - Replacing component

Not OK - Replacing component

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Replacing component
SRS ignition cable in the SRS cable harness between connector 24/33 and the sensor module is OK.
- Replace sensor module in accordance with.





Continue - FAULT FOUND

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Replacing component
If the ohmmeter reads approx. 0 ohms there is a short circuit in the SRS ignition cable in the SRS cable harness between separated connector 24/33 and the sensor module.
- Replace SRS cable harness.

Continue - FAULT FOUND

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