Part 2
Signal too high (Continued)
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 - Checking signal cable for a short-circuit to supply voltage
No Fault Found - Checking signal cable for a short-circuit to supply voltage
FAULT-TRACING FAILED - 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.
- Connect the transmission control module (TCM).
- Disconnect the engine control module (ECM) (Fenix 5.2, LH 3.2/EZ129K, Motronic 4.3 or Motronic 4.4).
- Ignition on.
Connect a voltmeter between #50 (#B20) and #20 (#A20) on the breakout box.
The voltmeter should read approx. 0 V.
OK - Checking throttle position (TP) sensor circuit
Not OK - Checking for a short-circuit
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Checking throttle position (TP) sensor circuit
Further fault-tracing depends on the vehicle's engine control module (ECM).
Select control module.
- Fenix 5.2 - diagnostic trouble code (DTC) EFI-243 Throttle position (TP) sensor signal, permanent fault, signal faulty
- LH 3.2 - Throttle position (TP) sensor signal, permanent fault, signal too low
- Motronic 4.3 - diagnostic trouble code (DTC) EFI-411 Throttle position (TP) sensor signal, permanent fault, signal too high
- Motronic 4.4 - diagnostic trouble code (DTC) EFI-411 Throttle position (TP) sensor signal, permanent fault, signal too low
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Signal faulty. Permanent fault
2-4-3 TP sensor signal
Checking ground lead
- Ignition off.
- Disconnect TP sensor.
- Connect an ohmmeter between connector terminal 1 and ground.
Ohmmeter should read approx. 0 ohms.
OK -
Not OK - Check lead between #A18 and sensor terminal 1 for open circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
20 - 40 ohm - Wait 4 minutes with ignition off and then try again.
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Checking for open-circuit
- Check lead between #A18 and sensor terminal 1 for open circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press Continue when fault is repaired.
Continue -
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