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Home >> Volvo >> 2001 >> V70 XC AWD L5-2.4L Turbo VIN 58 B5244T3 >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> SRS Codes (Supplemental Restraint System) >> SRS-0081 >> Permanent Fault >> Signal Too Low

Signal Too Low






Signal too low. Permanent fault

Checking the chassis number
The connecting pin on the center rear seat belt tensioner differs depending on whether the car has a -000258 or 000259- chassis number.
Check the vehicle chassis number.

Specify an alternative:
1. The car has a -000258 chassis number
2. The car has a 000259- chassis number.

1 - Checking the component

2 - Checking the component

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Checking the component








- Ignition off
- Disconnect the connector from the seat belt tensioner
- Connect test dummy connector 951 1506 Test dummy 951 1506 Test Dummy to the connector for 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!

Note! The special tool must be checked and fault-free. If the tool is defective, the diagnosis readings will be incorrect. This will make fault-tracing harder.

- Switch on the ignition. Wait 10 seconds.
Read off diagnostic trouble codes (DTCs).
Try a new seat belt tensioner if the diagnostic trouble code (DTC) changes status from a permanent to an intermittent fault.

Other information:
- To replace the seat belt tensioner, see Seat belts, replacing Seat Belts, Replacing.





Does the status of the diagnostic trouble code (DTC) change?

Yes - Verification

No - Checking components and wiring

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Checking components and wiring




- Ignition off
- Disconnect test dummy connector 951 1506 Test dummy 951 1506 Test Dummy from the connector for 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!

Caution! Do not touch the terminal pins in the supplemental restraint system module (SRS). There is a risk of static discharge which could damage the control module.

Caution! For V70 2000- with model year 2000 and 2001:- If diagnostic trouble code (DTC) SRS-0081 for the right seat belt tensioner is registered, follow fault-tracing for the center seat belt tensioner (SRS-0079).- If diagnostic trouble code (DTC) SRS-0079 for the center seat belt tensioner is registered, follow fault-tracing for the right seat belt tensioner (SRS-0081).

Check the cable between supplemental restraint system module (SRS) and the seat belt tensioner connector. Check for a short-circuit to ground. See below:

Diagnostic trouble code (DTC) SRS-0079
terminals 17A(17), #18A(18) of the center rear seat belt tensioner and connector terminals #1, #3.

Diagnostic trouble code (DTC) SRS-0081
terminals #16C(12), #15C(11) of the rear right seat belt tensioner and connector terminals #1, #3.
Remedy as necessary.

Other information:
- To access or replace the control module and connector, see Control module SRS (supplemental restraint system), replacing Supplemental Restraint System Module (SRS), Replacing
- To replace the seat belt tensioner, see Seat belts, replacing Seat Belts, 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 seat belt tensioner and control module connectors disconnected, the resistance between seat belt tensioner connector terminals #1 and #3 (control module side) and ground must be infinite
- For information about removing the battery cables, see Battery, disconnecting Battery Disconnecting
- With the ignition off and the connector for the seat belt tensioner disconnected, the resistance between the different terminals for each diagnostic trouble code (DTC) (see above) on the control module connector (seat belt tensioner side) must be infinite
- For information about the repair of SRS wiring, see Cable harness SRS system, repair Procedures
- For other values, see Signal specification Signal Specification, Supplemental Restraint System Module (SRS).









Select "Continue" when the fault has been remedied.

Continue - Verification

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Checking the component








- Ignition off
- Disconnect the 4-pin connector between the supplemental restraint system module (SRS) and the seat belt tensioner
- Connect special tool 943 8595 SRS 943 8595 SRS to the 4-pin 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!

Note! The special tool must be checked and fault-free. If the tool is defective, the diagnosis readings will be incorrect. This will make fault-tracing harder.

- Switch on the ignition. Wait 10 seconds.
Read off the diagnostic trouble codes (DTCs) and check if the status of the diagnostic trouble code (DTC) has changed from permanent to intermittent.

Other information:
- To replace the seat belt tensioner, see Seat belts, replacing Seat Belts, Replacing.





Does the diagnostic trouble code (DTC) status change from permanent to intermittent?

Yes - Checking the component

No - Checking components and wiring

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Checking the component








- Ignition off
- Disconnect the connector from the seat belt tensioner
- Disconnect special tool 943 8595 SRS 943 8595 SRS from the 4-pin connector
- Connect the 4-pin connector on the seat belt tensioner with the 4-pin connector on the control module
- Connect test dummy connector 951 1506 Test dummy 951 1506 Test Dummy to the connector for 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!

Note! The special tool must be checked and fault-free. If the tool is defective, the diagnosis readings will be incorrect. This will make fault-tracing harder.

- Switch on the ignition. Wait 10 seconds.
Read off diagnostic trouble codes (DTCs).
Try a new seat belt tensioner if the diagnostic trouble code (DTC) changes status from a permanent to an intermittent fault. If the diagnostic trouble code (DTC) does not change status, the fault is in the wiring between the 4-pin connector and the seat belt tensioner.
Remedy as necessary.

Other information:
- To replace the seat belt tensioner, see Seat belts, replacing Seat Belts, Replacing
- For information about the repair of SRS wiring, see Cable harness SRS system, repair Procedures.





Is the fault intermittent?

Yes - Verification

No - Checking components and wiring

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Checking components and wiring




- Ignition off
- Disconnect special tool 943 8595 SRS 943 8595 SRS from the connector for 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!

Caution! Do not touch the terminal pins in the supplemental restraint system module (SRS). There is a risk of static discharge which could damage the control module.

Caution! For V70 2000- with model year 2000 and 2001:- If diagnostic trouble code (DTC) SRS-0081 for the right seat belt tensioner is registered, follow fault-tracing for the center seat belt tensioner (SRS-0079).- If diagnostic trouble code (DTC) SRS-0079 for the center seat belt tensioner is registered, follow fault-tracing for the right seat belt tensioner (SRS-0081).

Check the cable between supplemental restraint system module (SRS) and the seat belt tensioner connector. Check for a short-circuit to ground. See below:

Diagnostic trouble code (DTC) SRS-0079
middle seat belt tensioner rear terminals 24C(20), #23C(19) and the 4-pin connector terminals #3, #4.

Diagnostic trouble code (DTC) SRS-0081
right seat belt tensioner rear terminals #16C(12), #15C(11) and the 4-pin connector terminals #1, #2.
Remedy as necessary.

Other information:
- To access or replace the control module and connector, see Control module SRS (supplemental restraint system), replacing Supplemental Restraint System Module (SRS), Replacing
- To replace the seat belt tensioner, see Seat belts, replacing Seat Belts, Replacing
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Supplemental Restraint System Module (SRS)
- For information about removing the battery cables, see Battery, disconnecting Battery Disconnecting
- For information about the repair of SRS wiring, see Cable harness SRS system, repair Procedures
- For other values, see Signal specification Signal Specification, Supplemental Restraint System Module (SRS).









Select "Continue" when the fault has been remedied.

Continue - Verification

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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

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the chassis number

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Checking components and wiring




- Ignition off
- Disconnect dummy test connector 951 1506 Test dummy 951 1506 Test Dummy from the connector for 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!

Caution! Do not touch the terminal pins in the supplemental restraint system module (SRS). There is a risk of static discharge which could damage the control module.

Caution! For V70 2000- with model year 2000 and 2001:- If diagnostic trouble code (DTC) SRS-0081 for the right seat belt tensioner is registered, follow fault-tracing for the center seat belt tensioner (SRS-0079).- If diagnostic trouble code (DTC) SRS-0079 for the center seat belt tensioner is registered, follow fault-tracing for the right seat belt tensioner (SRS-0081).

Check the cable between supplemental restraint system module (SRS) and the seat belt tensioner connector. Check for a short-circuit to ground. See below:

Diagnostic trouble code (DTC) SRS-0079
middle seat belt tensioner rear terminals 24C(20), #23C(19) and connector terminals #1, #3.

Diagnostic trouble code (DTC) SRS-0081
terminals #16C(12), #15C(11) of the rear right seat belt tensioner and connector terminals #1, #3.
Remedy as necessary.

Other information:
- To access or replace the control module and connector, see Control module SRS (supplemental restraint system), replacing Supplemental Restraint System Module (SRS), Replacing
- To replace the seat belt tensioner, see Seat belts, replacing Seat Belts, 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 seat belt tensioner and control module connectors disconnected, the resistance between seat belt tensioner connector terminals #1 and #3 (control module side) and ground must be infinite
- For information about removing the battery cables, see Battery, disconnecting Battery Disconnecting
- For information about the repair of SRS wiring, see Cable harness SRS system, repair Procedures
- For other values, see Signal specification Signal Specification, Supplemental Restraint System Module (SRS).









Select "Continue" when the fault has been remedied.

Continue - Verification

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