Signal Missing
Signal missing
Checking the vehicle speed signal
- Ignition off.
- Raise the car.
- Remove the front wheels during the test.
- Engine idling.
- Go into scrolling values.
- Read off the speed.
- Shift the gear selector to position D so the front wheels begin to rotate.
Check that the speed increases with engine speed (RPM).
Note! Diagnostic trouble codes (DTCs) may be stored in the ABS system when the rear wheels are stationary and the front wheels rotate. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.
Note! Ensure that the front wheels are stationary when the gear selector is moved.
Does speed increase with engine speed (RPM)?
Yes - Intermittent fault
No - Connecting the breakout box
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Connecting the breakout box
Connecting the breakout box
951 1355 Adapter 42-pin 951 1355 Adapter 42-pin 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Information
Connecting the breakout box to AW50-42
Is the breakout box connected to the control module?
Yes - CONNECTEDReturn to fault-tracing.
No - NOT CONNECTED
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CONNECTED - CONNECTED
NOT CONNECTED - Connecting the breakout box
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Connecting the breakout box
Connecting the breakout box
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 951 1355 Adapter 42-pin 951 1355 Adapter 42-pin
Connecting the breakout box
Caution! The voltage supply to the control module must be disconnected when disconnecting the breakout box. Failure to observe this procedure could seriously damage the control module.
- Ignition off
- Expose and disconnect the AW50-42 transmission control module (TCM) according to Replacing the transmission control module (TCM) .
- Control module disconnected.
Connect adapter 951 1355 Adapter 42-pin 951 1355 Adapter 42-pin to the control module connector (wiring side). Connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to the adapter.
Note! Ensure that the adapter is the right way around.
Continue - DONE
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DONE - Checking the ground terminal
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Checking the ground terminal
- Ignition off.
- Control module disconnected.
- Switch off all power consuming equipment, such as courtesy lighting, radio etc.
Connect an ohmmeter between terminal 1 on the breakout box and the battery negative terminal.
The ohmmeter should read approximately 0 ohms.
OK - Return to the fault-tracing procedure where it was interrupted.
No Fault Found
Not OK - Checking for an open-circuit, contact resistance and oxidation
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Checking for an open-circuit, contact resistance and oxidation
Check ground terminal 31/20 and the lead between the ground terminal and control module #1 for open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the ground lead between the battery and the body for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Verification
Verification
Hint: After repairs have been completed they must be verified as follows to ensure that the fault has been eliminated:
- Ignition off
- Switch off all power consuming equipment, such as courtesy lighting, radio etc.
- Control module disconnected
Connect an ohmmeter between #1 on the breakout box and the battery negative terminal.
The ohmmeter should read approximately 0 ohms.
OK - VERIFIED
Not OK - 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 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
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Attempt New Test - Connecting the breakout box
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CONNECTED - Checking the circuit for the speed sensor
FAULT FOUND - Checking the circuit for the speed sensor
No Fault Found - Checking the circuit for the speed sensor
FAULT-TRACING FAILED - Checking the circuit for the speed sensor
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Checking the circuit for the speed sensor
- Ignition off.
- Control module disconnected.
Connect an ohmmeter between:
- terminals 8 and 36 on the breakout box (Fenix 5.1)
- terminals 11 and 24 on the breakout box (EMS 2000).
The ohmmeter should read 300-600 ohms.
OK - Checking signal cables
Not OK - Checking the speed sensor resistance
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Checking the speed sensor resistance
- Ignition off.
- Disconnect 2-pin speed sensor connector. For further information about the connectors, see Transmission connectors Transmission Connectors.
Connect an ohmmeter between speed sensor connector terminals 1 and 2 (speed sensor side).
The ohmmeter should read approximately 300-600 ohms.
OK - Checking the resistance in the signal cables
Not OK - Replacing the component
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Replacing the component
- Ignition off.
Try a new speed sensor according to Replacing the speed sensor .
Continue - Verification
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Checking the resistance in the signal cables
- Ignition off.
- Speed sensor disconnected.
Connect an ohmmeter between the 2-pin speed sensor connector:
- Fenix 5.1:
- terminals 2 and 8 on the breakout box.
- terminals 1 and 36 on the breakout box.
- EMS 2000:
- terminals 2 and 11 on the breakout box.
- terminals 1 and 24 on the breakout box.
The ohmmeter should read approximately 0 ohms for both readings.
OK - Checking signal wiring resistance
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check the cable between speed sensor connectors:
- Fenix 5.1:
- terminal 2 and control module terminal 8
- terminal 1 and control module terminal 36
- EMS 2000:
- terminal 2 and control module terminal 11
- terminal 1 and control module terminal 24
for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking signal wiring resistance
- Ignition off.
- Speed sensor disconnected.
- Control module disconnected.
Connect an ohmmeter between:
- terminals 8 and 36 on the breakout box (Fenix 5.1)
- terminals 11 and 24 on the breakout box (EMS 2000).
The ohmmeter should read infinite resistance.
OK - Checking contact resistance and oxidation
Not OK - Checking for a short-circuit
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Checking contact resistance and oxidation
The cause of the diagnostic trouble code (DTC) was loose connections in the control module and speed sensor connectors. Check the connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking for a short-circuit
Check the cable between speed sensor connectors:
- terminal 2 and control module terminal 8 (Fenix 5.1)
- terminal 2 and control module terminal 11 (EMS 2000)
and the cable between
- terminal 1 and control module terminal 36 (Fenix 5.1)
- terminal 1 and control module terminal 24 (EMS 2000)
for a short-circuit to each other.
Continue - Verification
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Checking signal cables
- Ignition off.
- Breakout box connected.
- Connect the control module.
- Ignition on.
Connect a voltmeter between:
- terminals 1 and 36 on the breakout box (Fenix 5.1)
- terminals 1 and 24 on the breakout box (EMS 2000).
The voltmeter should read approximately 2.5 V.
OK - Checking contact resistance and oxidation
Low - Checking for a short-circuit
High - Checking for a short-circuit
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Checking contact resistance and oxidation
The cause of the diagnostic trouble code (DTC) was loose connections in the control module connector. Check the transmission and transmission control module (TCM) connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking for a short-circuit
Check the cables between the speed sensor and control module:
- terminals 8 and 36 (Fenix 5.1)
- terminals 11 and 24 (EMS 2000)
for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking for a short-circuit
Check the cables between the speed sensor and control module:
- terminals 8 and 36 (Fenix 5.1)
- terminals 11 and 24 (EMS 2000)
for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied. Proceed as follows.
- Ignition off.
- Reinstall the connectors, components etc.
- Raise the car.
- Remove the front wheels during the test.
- Engine idling.
Check that the speed increases with engine speed (RPM).
Note! Diagnostic trouble codes (DTCs) may be stored in the ABS system when the rear wheels are stationary and the front wheels rotate. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.
Note! Ensure that the front wheels are stationary when the gear selector is moved.
Does speed increase with engine speed (RPM)?
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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the vehicle speed signal
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Intermittent fault
Signal missing. Intermittent fault
Intermittent fault
- Check the speed sensor and control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
- Check the cables between the speed sensor and control module:
- terminals 8 and 36 (Fenix 5.1)
- terminals 11 and 24 (EMS 2000)
- for intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults , an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and an intermittent short-circuit to supply according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults and an intermittent short-circuit to each other.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Checking the vehicle speed signal
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