Capacitance Too Low. Permanent Fault
Capacitance too low. Permanent fault
Checking components and wiring
- Ignition off.
- Disconnect special tool 951 1506 Test dummy 951 1506 Test Dummy from the connector for the left-hand side impact protection (SIPS) bag.
Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected, non-deployed, pyrotechnic airbag. This could deploy the airbag!
Caution! Do not touch the terminal pins in the SRS control module. There is a risk of static discharge. This could damage the SRS control module.
Check the female and male parts of the connector for the SRS control module and the 2-pin connector. The cable terminals must not be damaged or pressed back.
Check the cable between the SRS control module terminal #4A (4) and connector terminal #1 on the left-hand side impact protection (SIPS) bag for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable between the SRS control module terminal #3A (3) and connector terminal #2 on the left-hand side impact protection (SIPS) bag for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Hint: Check the integrated capacitor in the igniter connector: Measure the resistance.
With the ignition off, connect the test instrument probes between terminals #1 and #2 on the connector for the driver's airbag. The ohmmeter reading should rise rapidly to infinity.
Reverse the position of the ohmmeter positive and negative test probes. Connect them to the connector as in the previous measurement. The ohmmeter reading should drop rapidly to approximately 0 ohms and then increase to infinity.
Remedy as necessary.
Other information:
- To access / replace the connector for the left-hand side impact protection (SIPS) bag, see Airbag driver and passenger (SRS), replacing Airbag Driver and Passenger (SRS), Replacing.
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS).
- With the ignition off and the 4-pin connector disconnected, the resistance between terminals #1 and #2 of the 4-pin connector (SRS control module side) should be approximately 22 kohms.
- For information about the repair of SRS wiring, see Cable harness SRS system, repair Procedures.
- For other values, see Signal specification Signal Description, Supplemental Restraint System (SRS) Control Unit.
Select "Continue" when the fault has been remedied.
Yes - Verification
No - Replacing the component
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Replacing the component
Try replacing the side impact protection (SIPS) bag according to Airbag module seat (SIPS), replacing Airbag Module Seat (SIPS), Replacing.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Disconnect the battery negative lead
- Reinstall the connectors, components etc.
- Ignition on
- Connect the battery negative lead.
Warning! There must not be anyone inside the passenger compartment when the battery is connected.
- Read off diagnostic trouble codes (DTCs).
The fault is no longer present if the diagnostic trouble code (DTC) status is intermittent.
Is the diagnostic trouble code (DTC) intermittent?
Yes - Verification completed
No - 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 components and wiring
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