Faulty Signal
Faulty signal
Checking load signal
- Start engine.
- Go into scrolling value.
- Read off load signal.
Normal range idling with warm engine, N position and air conditioning (A/C) off: approx. 35 micros. This value increases with load.
Yes - Intermittent fault
No - Connecting the breakout box
Connecting the breakout box. Checking ground terminals
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Connecting the breakout box
Connecting the breakout box
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 981 3195 ADAPTOR 981 3195 Adaptor
Connecting the breakout box (Automatic transmission)
Is the breakout box connected to the control module?
Yes - CONNECTED
No - 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 981 3195 ADAPTOR 981 3195 Adaptor
Connecting the breakout box
Caution! The control module power supply must be disconnected when connecting or disconnecting the breakout box, otherwise it may be damaged.
- Ignition off
- Disconnect the transmission control module (TCM).
- Connect adapter 981 3195 ADAPTOR 981 3195 Adaptor to transmission control module (TCM) connector and connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.
Note! Ensure that the adaptor is the right way round - with the breakout box cable harness outwards towards the fender.
Select "Continue"
Continue - DONE
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DONE - Checking ground terminals
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Checking ground terminals
- Ignition off.
- Control module disconnected.
- Turn of all equipment in the car that takes power from the battery (the interior lighting and radio etc).
Connect an ohmmeter between the battery negative terminal and:
#20 (#A20) on the breakout box
#29 (#A29) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings
OK - 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 terminals 31/32 and 31/33 and cables between ground terminals and control module #A20 and #A29 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.
Check ground lead between battery and bodywork 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.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair check that the fault has been remedied.
Carry out the following:
- Ignition off
- Turn of all equipment in the car that takes power from the battery (the interior lighting and radio etc).
- Control module disconnected.
Connect an ohmmeter between the battery negative terminal and:
#20 (#A20) on the breakout box
#29 (#A29) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings
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 - Checking ground terminals
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CONNECTED - Checking signal cable for a short-circuit to supply voltage
FAULT FOUND - Verification
FAULT-TRACING FAILED - Checking signal cable for a short-circuit to supply voltage
No Fault Found - Checking signal cable for a short-circuit to supply voltage
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Checking signal cable for a short-circuit to supply voltage
- Ignition off.
- Transmission control module (TCM) connected.
- Ignition on.
Connect an electrician's screwdriver (bulb at least 3 W) between #42 (B#12) and #20 (A#20) on the breakout box.
The electricians screwdriver should not light.
OK - Checking signal cable resistance to ground
Not OK - Checking for a short-circuit
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Checking for a short-circuit
Check cable between transmission control module (TCM) #B12 and engine control module (ECM) #B12 (Fenix 5.2, LH 3.2, EZ 129K, Motronic 4.3 or Motronic 4.4) 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
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Checking signal cable resistance to ground
- Ignition off.
- Engine control module (ECM) disconnected. (On cars with LH 3.2/EZ 129K both control modules LH 3.2 and EZ 129K.)
- Transmission control module (TCM) connected.
Connect an ohmmeter between #42 (#B12) and #20 (#A20) on the breakout box.
Does the ohmmeter read infinite resistance?
Yes - Checking the signal cable
No - Checking for a short-circuit
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Checking for a short-circuit
Check cable between transmission control module (TCM) #B12 and engine control module (ECM) #B12 (Fenix 5.2, LH 3.2, EZ 129K, Motronic 4.3 and Motronic 4.4) for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking the signal cable
- Ignition off.
- Connect the transmission control module (TCM).
- Connect engine control module (ECM). (On cars with LH 3.2/EZ129K both control modules LH 3.2 and EZ 129K.)
- Start engine.
- Go into SCROLLING VALUE
- Read off load signal.
Normal value at idling speed with engine at operating temperature, neutral and air conditioning (A/C) off is approx. 35 micros. This value increases with load.
Does value increase with engine load?
Yes - Checking for a short-circuit
No - Checking for an open-circuit
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Checking for a short-circuit
The cause of the diagnostic trouble code (DTC) has been loose connections in the transmission control module (TCM) connector. Remedy short-circuit to ground in transmission control module (TCM) according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking for an open-circuit
Check cable between transmission control module (TCM) #B12 and engine control module (ECM) #B12 for the Fenix 5.2, LH 3.2, EZ 129K, Motronic 4.3 and Motronic 4.4 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
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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.
- Reconnect the connectors, reinstall components etc.
- Ignition on.
- Go into scrolling values.
- Read off load signal.
- Engine idling.
Normal range idling with warm engine, N position and A/C off: approx. 35 micros. The value increases with engine load.
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 load signal
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Intermittent fault
Faulty signal. Intermittent fault
Intermittent fault
- Check transmission and engine control module (ECM) connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults
- Check cable between transmission control module (TCM) #B12 and engine control module (ECM) #B12 (Fenix 5.2, LH 3.2, EZ 129K, Motronic 4.3 and Motronic 4.4) for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , 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 voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Select "Continue" when the fault has been repaired.
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 load signal
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