Signal Missing
Signal missing
Checking transmission speed signal
- Ignition off.
- Raise car so that front wheels rotate freely.
- Remove the front wheels during the test.
- Engine idling.
- Go into scrolling values.
- Read off the transmission input speed.
- Shift the gear selector to position D so that the front wheels begin to rotate.
Check that the transmission input speed is updated. The transmission input speed should increase with engine speed.
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.
Is the transmission input speed OK?
Yes - Intermittent fault
No - Connecting the breakout box
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 transmission speed sensor circuit
FAULT FOUND - Checking transmission speed sensor circuit
No Fault Found - Checking transmission speed sensor circuit
FAULT-TRACING FAILED - Checking transmission speed sensor circuit
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Checking transmission speed sensor circuit
- Ignition off.
- Control module disconnected.
Connect an ohmmeter between:
- terminals 22 and 37 (Fenix 5.1)
- terminals 25 and 39 (EMS 2000)
on the breakout box.
The ohmmeter should read 300-600 ohms.
OK - Checking signal cables
Not OK - Checking transmission speed sensor resistance
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Checking transmission speed sensor resistance
- Ignition off.
- Disconnect the black 2-pin transmission connector. For further information about the connectors, see Transmission connectors Transmission Connectors.
- Control module disconnected.
Connect an ohmmeter between the black 2-pin transmission connector terminals 1 and 2 (speed sensor side).
The ohmmeter should read 300-600 ohms.
OK - Checking the resistance in the signal cables
Not OK - Checking for an open-circuit and replacing the component
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Checking for an open-circuit and replacing the component
Check the cables between the speed sensor and transmission connector terminals 1 and 2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Check for a short-circuit to each other.
Was a fault detected?
Yes - Verification
No - Replacing the component
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Checking the resistance in the signal cables
- Ignition off.
- Black 2-pin transmission connector disconnected.
- Control module disconnected.
Connect an ohmmeter between the black 2-pin connector terminal:
- Fenix 5.1:
- terminal 2 (control module side) and terminal 37 on the breakout box
- terminal 1 (control module side) and terminal 22 on the breakout box
- EMS 2000:
- terminal 2 (control module side) and terminal 25 on the breakout box
- terminal 1 (control module side) and terminal 39 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 transmission connector:
- Fenix 5.1:
- terminal 2 and control module terminal 37
- terminal 1 and control module terminal 22
- EMS 2000:
- terminal 2 and control module terminal 25
- terminal 1 and control module terminal 39
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.
- Black 2-pin transmission connector disconnected.
- Control module disconnected.
Connect an ohmmeter between:
- terminals 22 and 37 on the breakout box (Fenix 5.1)
- terminals 25 and 39 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 transmission control module (TCM) and transmission 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 transmission connector:
- terminal 2 and control module terminal 37 (Fenix 5.1)
- terminal 2 and control module terminal 25 (EMS 2000)
for a short-circuit in the cable between transmission connector:
- terminal 1 and control module terminal 22 (Fenix 5.1)
- terminal 1 and control module terminal 39 (EMS 2000).
Continue - Verification
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Checking signal cables
- Ignition off.
- Breakout box connected.
- Connect the control module.
- Ignition on.
Connect a voltmeter between the breakout box:
- terminals 37 and 1 (Fenix 5.1)
- terminals 25 and 1 (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 22 and 37 (Fenix 5.1)
- terminals 39 and 25 (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 22 and 37 (Fenix 5.1)
- terminals 39 and 25 (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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Replacing the component
Try a new transmission speed sensor according to Replacing the engine speed (RPM) sensor Service and Repair.
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.
- Go into scrolling values.
- Read off the transmission input speed.
- Shift the gear selector to position D so that the front wheels begin to rotate.
Check that the transmission input speed is updated. The transmission input speed should increase with engine speed.
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.
Is the transmission input speed OK?
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 transmission speed signal
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Intermittent fault
Signal missing. Intermittent fault
Intermittent fault
- Check the transmission and the control module connectors for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults. Check 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 22 and 37 (Fenix 5.1)
- terminals 39 and 25 (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.
- Check the cables between the speed sensor and control module:
- terminals 22 and 37 (Fenix 5.1)
- terminals 39 and 25 (EMS 2000)
- for 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 transmission speed signal
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