Signal Too Low
Signal too low. Permanent fault
Checking the cable
- Ignition off
- Disconnect the 2-pin connector under the left-hand seat.
Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected, non-deployed, pyrotechnical 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 cable between the SRS control module terminal #4A (4) and the 2-pin connector terminal #1 for a short-circuit to ground. See Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between the SRS control module terminal #3A (3) and the 2-pin connector terminal #2 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Other information:
- To access and replace the SRS control module and connector, see Control module SRS (supplemental restraint system), replacing Service and Repair
- To connect the breakout box, see Connecting the breakout box Connecting The Breakout Box
- With the ignition off and the 2-pin connector disconnected, the resistance between terminals #1 and #2 on the 2-pin connector (SRS control module side) and ground should be infinite
- With the ignition off and the 2-pin connector disconnected, the resistance between the 2-pin connector terminals #1 and #2 (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 Specification.
Were any faults found in the cable?
Yes - Verification
No - Checking the resistance
-------------------------------------------------
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
-------------------------------------------------
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 - VERIFIED
No - VERIFICATION FAILED
------------------------
VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
-------------------------------------------------
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
------------------------
FAULT-TRACING FAILED - No Fault Found
Attempt New Test - Checking the cable
-------------------------------------------------
Checking the resistance
- Ignition off.
Measure the resistance between the 2-pin connector #1 and #2 (against Supplemental Restraint System Module (SRS)).
The resistance shall be approx. 22 kohms.
If the value does not match the likely cause is some internal defect in Supplemental Restraint System Module (SRS) or in its connectors.
Remedy as necessary.
Other information
- Control module SRS (supplemental restraint system), replacing Service and Repair
- Connecting the breakout box Connecting The Breakout Box
- Signal specification Signal Specification
Has the fault been remedied?
Yes - Verification
No - Replacing the component
-------------------------------------------------