Part 1

Signal too high

Status message

Note! To obtain the correct status message:

- Ignition on.
- Floor accelerator pedal (AP). Keep it depressed.
- Wait approx. 15 seconds.
Read off diagnostic trouble code (DTC).

Is the status PERMANENT FAULT displayed?

Yes - Checking throttle position (TP) sensor signal

No - Intermittent fault

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Checking throttle position (TP) sensor signal

- Ignition on.
- Go into scrolling values.
- Read off the throttle position (TP) sensor signal.
Floor the accelerator pedal several times and check whether the throttle position (TP) sensor signal increases to approx. 5 V.

Does the value increase to approx. 5 V?

Yes - Checking throttle position (TP) sensor circuit

No - Connecting the breakout box

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Intermittent fault

Signal too high. Intermittent fault

Intermittent fault
- Check cable between transmission control module (TCM) #B20 and engine control module (ECM) #B20 for the Fenix 5.2, LH 3.2, Motronic 4.3 or Motronic 4.4 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- On cars with engine management system LH 3.2/EZ129K, also check the cable between engine control module (ECM) LH 3.2 #B20 and EZ129K #B20 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the throttle position (TP) sensor circuit for the relevant engine control module (ECM).
- Fenix 5.2 - diagnostic trouble code (DTC) EFI-243 Throttle position (TP) sensor signal, intermittent fault
- LH 3.2 - diagnostic trouble code (DTC) EFI-411 Throttle position (TP) sensor signal, intermittent fault, signal too high
- Motronic 4.3 - diagnostic trouble code (DTC) EFI-411 Throttle position (TP) sensor signal, intermittent fault, signal too high
- Motronic 4.4 - diagnostic trouble code (DTC) EFI-411 Throttle position (TP) sensor signal, intermittent fault, signal too high

Select "Continue" when the fault has been repaired.

Continue - Verification

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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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Signal faulty. Intermittent fault

2-4-3 TP sensor signal

Checking leads and connections
- Check TP sensor and control module connectors for loose contacts as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check lead between #A15 and connector terminal 2 for intermittent open circuit as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , intermittent short-circuit to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and intermittent short circuit to supply as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check lead between #A16 and connector terminal 3 for intermittent open circuit as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , intermittent short-circuit to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and intermittent short circuit to supply as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

- Check lead between #A18 and connector terminal 1 for intermittent open circuit as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

Press Continue when fault is repaired.

Continue -

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Troubleshooting information
Information
Attempt New Test -

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FAULT FOUND - Fault-tracing information

No Fault Found - Fault-tracing information

FAULT-TRACING FAILED - Fault-tracing information

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Signal too low. Intermittent fault

Checking wiring and connections

- Check lead between throttle position sensor connector terminal 3 and MFI module #A1 for intermittent short-circuit to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check lead between throttle position sensor connector terminal 2 and MFI module #A2 for intermittent open-circuit as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

- Check the TP sensor's and ECM's connectors for signs of loose connection as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults as well as contact resistance and oxidation as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the lead between TP sensor connector 3 and ECM #A16 for signs of intermittent short circuiting to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the lead between TP sensor connector 2 and ECM #A15 for signs of an intermittent break as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and intermittent short circuiting to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

- Check throttle position (TP) sensor and engine control module (ECM) connectors for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.

Continue - Fault-tracing information
Fault-tracing information

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Fault-tracing information
Information
Attempt New Test - Checking cables and terminals

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FAULT FOUND - Fault-tracing information

No Fault Found - Fault-tracing information

FAULT-TRACING FAILED - Fault-tracing information

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Attempt New Test - Status message

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Other diagnostic trouble codes (DTCs)
Read off OTHER DTCs in engine management system (Fenix 5.2, LH 3.2, Motronic 4.3 or Motronic 4.4).

Are diagnostic trouble codes (DTCs) EFI-243 for the Fenix 5.2, EFI-411 for the LH 3.2, EFI-411 for the Motronic 4.3 or EFI-411 for the Motronic 4.4 stored?

Yes - Fault-tracing information

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Fault-tracing information
Fault-trace according to engine management system diagnostic trouble code (DTC) (EFI-243 for the Fenix 5.2, EFI-411 for the LH3.2, EFI-411 for the Motronic 4.3 or EFI-411 for the Motronic 4.4).

Continue - Verification

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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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