Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

EFI-311 Speedometer signal

Checking instrument

Check to see if the car has a VDO or Yazaki combined instrument panel. The upper combined instrument panel is a VDO and the lower a Yazaki.

VDO - Checking diagnostic trouble codes (DTCs) in the combined instrument panel

Yazaki - Checking speedometer

-------------------------------------------------

Checking speedometer

- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use the instrument in stand-alone mode.
Test drive the car.

Check that speedometer is operating correctly.

OK - Checking vehicle speed signal
Checking ground terminals

Not OK - Checking diagnostic trouble codes (DTCs) in the ABS system

-------------------------------------------------

Checking diagnostic trouble codes (DTCs) in the ABS system

- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use the instrument in stand-alone mode.
- Ignition on.
- Read off the ABS system diagnostic trouble codes (DTCs).

Are any diagnostic trouble codes (DTCs) stored?

Yes - Fault-tracing information

No - Fault-tracing information

-------------------------------------------------

Fault-tracing information
- Fault-trace according to service information.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Fault-tracing information
- Fault-trace according to service information.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Checking ground terminals

Connector A
951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Connecting up the Test box to Motronic 4.3

Is the test box connected to the control module?

Yes - FAULT FOUND

No -

------------------------

Connection of break-out box to connector A (black)

- Switch off ignition.
- Disconnect ECM.

Note! The ECM must not be removed from the car until the main relay has interrupted the supply. This may take up to 150 seconds after the ignition has been switched off.

- Plug adapter 951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin into ECM base and connect break-out box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.

Press Continue.

Continue -

------------------------

Checking ground terminals

- Switch off ignition.
- Switch off all power consumers, such as interior lighting and radio.

- Use ohmmeter to measure resistance between battery negative terminal and
- #13 (#A13) on break-out box
- #28 (#A28) on break-out box
- #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

OK - Resume fault tracing at point of interruption.
No Fault Found

Not OK - Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.Check ground lead between engine and chassis for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

------------------------

Checking for open-circuit, contact resistance and oxidation

- Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Check ground lead between engine and chassis for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Press Continue when fault is repaired.

Continue -

------------------------

Verification

Hint: After repair, it is necessary to check that the fault has been corrected.
Perform as described below.

- Switch off ignition.
- Switch off all power consumers, such as interior lighting and radio.

- Use ohmmeter to measure resistance between battery negative terminal and
- #13 (#A13) on break-out box
- #28 (#A28) on break-out box
- #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

OK - FAULT FOUND

Not OK -

------------------------

Troubleshooting Information

Information

Fault-tracing information
The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.

Do you want to terminate fault-tracing at this time?

Yes - Exit fault-tracing

No - Attempt New Test

------------------------

Attempt New Test -

-------------------------------------------------

FAULT FOUND - Checking vehicle speed signal

No Fault Found - Checking vehicle speed signal

FAULT-TRACING FAILED - Checking vehicle speed signal

-------------------------------------------------

Checking vehicle speed signal

- Connect the breakout box and check ground terminals according to Connecting breakout box (connector B) Connecting Breakout Box (Connector B).
- Connect control module.
- Gear selector in Neutral.
- Raise car so that front wheels are free of the ground.
- Ignition on.
Connect an oscilloscope between terminals #18 (#B18) and #28 (#B28) on the breakout box.

- Rotate the front wheels.

Note! When the rear wheels are stationary and the front wheels rotate diagnostic trouble codes (DTCs) may can be stored in the ABS system. Erase ABS system diagnostic trouble codes (DTCs) according to service information after fault-tracing.

The value on the oscilloscope should oscillate between approximately 0.5 V and above battery voltage.

OK - The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector. Check connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Fault-tracing information

Not OK - Checking signal cable voltage

-------------------------------------------------

Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.
- Check connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Checking signal cable voltage

- Breakout box connected.
- Gear selector in Neutral.
- Raise car so that front wheels are free of the ground.
- Ignition on.
Connect an oscilloscope between terminals #18 (#B18) and #28 (#B28) on the breakout box.

- Rotate the front wheels.

Note! When the rear wheels are stationary and the front wheels rotate diagnostic trouble codes (DTCs) may can be stored in the ABS system. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.

The value on the oscilloscope should oscillate between approximately 0.5 V and above battery voltage.

O V - Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Fault-tracing information

5 V - Checking the signal cable

-------------------------------------------------

Fault-tracing information
- Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Checking the signal cable

- Breakout box connected.
- Ignition on.
Connect an electrician's screwdriver (3 W bulb at least) between terminals #18 (#B18) and #28 (#B28) on the breakout box.

The electrician's screwdriver should not light.

OK - Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for an open-circuit

Not OK - Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for a short-circuit

-------------------------------------------------

Checking for an open-circuit
- Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Checking for a short-circuit
- Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Checking diagnostic trouble codes (DTCs) in the combined instrument panel

- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use the instrument in stand-alone mode.
- Ignition on.
Read off any diagnostic trouble codes (DTCs).

Are any diagnostic trouble codes (DTCs) stored?

Yes - Fault-trace combined instrument panel according to service information. Then continue with Verification.
Fault-tracing information

No - Checking vehicle speed signal
Checking ground terminals

-------------------------------------------------

Fault-tracing information
- Fault-trace combined instrument panel according to service information.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Checking ground terminals
Connector A

FAULT FOUND - Checking vehicle speed signal

No Fault Found - Checking vehicle speed signal

FAULT-TRACING FAILED - Checking vehicle speed signal

-------------------------------------------------

Checking vehicle speed signal

- Ignition off.
- Breakout box connected.
- Expose combined instrument panel according to service information.
Connect an ohmmeter between combined instrument panel connector A terminal 7 and #18 (#A18) on the breakout box.

The ohmmeter should read approximately 0 ohms.

OK - Fault-trace combined instrument panel and vehicle speed sensor (VSS) circuit according to service information. Then continue with Verification.
Fault-tracing information

Not OK - Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Fault-tracing information

-------------------------------------------------

Fault-tracing information
- Fault-trace combined instrument panel and vehicle speed sensor (VSS) circuit according to service information.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Fault-tracing information
- Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Select "Continue" when the fault has been repaired.

Continue - Verification

-------------------------------------------------

Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied as follows:

- Ignition off.
- Control module connected.
- Combined instrument panel connected.
- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use the instrument in stand-alone mode.
- Test drive the car.
- Go into scrolling values.
Read off the speedometer signal.

Is the correct vehicle speed signal displayed?

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

------------------------

Attempt New Test - Checking instrument

-------------------------------------------------