Part 5

Signal too high (Continued)

Checking for short-circuit

- Check the lead between the TP sensor connector 2 and control module #A15 for signs of a short circuit to voltage supply 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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Checking the signal lead

- Ignition on.
- TP sensor disconnected.

- Connect a voltmeter between the TP sensor connector 3 and ground.

The voltmeter should show approx. 5 V.

OK -

Low -

High -

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Checking for short-circuit

- Check the lead between TP sensor connector 3 and ECM #A16 for signs of short circuiting to voltage supply 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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Checking the ECM connector

- Ignition off.
- TP sensor disconnected.
- Rectify the ECM connector with regard to contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- ECM connected.
- Ignition on.

- Connect a voltmeter between TP sensors connector 3 and ground.

The voltmeter should show approx. 5 V.

OK - The source of the DTC is poor contact in the ECM's connector.

Not OK - Check the lead between TP sensor connector 3 and the ECM #A16 for signs of a break as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

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Fault tracing information
The source of the DTC is poor contact in the ECM's connector.

Press Continue.

Continue - FAULT FOUND

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Checking for open-circuit

- Check the lead between TP sensor connector 3 and the ECM #A16 for signs of a break 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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Checking the TP sensor signal

- Ignition off.
- Connect the TP sensor.
- Start the engine and let it run at idling speed.

- Read off the throttle angle.

Throttle angle should be 3 - 8° when the engine is at idling speed, increasing as the accelerator pedal is pressed down.

OK - The source of the DTC is poor contact in the TP sensor's connector. Rectify the connector with regard to contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Not OK - Test with a new TP sensor.

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Checking for contact resistance and oxidation
The source of the DTC is poor contact in the TP sensor's connector.
- Rectify the connector with regard to contact resistance and oxidation 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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Replacement of component
- Test with a new TP sensor.

Press Continue when fault is repaired.

Continue -

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Checking the TP sensor

Hint: The TP sensor may break as a sequential fault resulting from short circuiting of the signal lead to voltage supply. Check the TP sensor as below.

- Ignition off.
- Connect the TP sensor.
- Start the engine and let it run at idling speed.

- Read off the throttle angle.

Throttle angle should be 3 - 8° when the engine is idling, increasing as the accelerator pedal is pressed down.

OK - TP sensor is OK.

Not OK - Test with a new TP sensor.

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Fault tracing information
TP sensor is OK.

Press Continue.

Continue - FAULT FOUND

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Replacement of component
- Test with a new TP sensor.

Press Continue when fault is repaired.

Continue -

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Verification

Verify

Verification

Hint: After repair, it is necessary to check that the fault has been corrected.
Perform as follows:

- Ignition off.
- Reconnect connectors, components etc.
- Start engine and let it run at idling speed.

- Read off the throttle angle.

Throttle angle should be 3-8° at CTP and 80°-90° at WOT.

OK - VERIFIED

Not OK - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED -

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Troubleshooting Information
Information
Attempt New Test -

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FAULT FOUND - Verification

No Fault Found - Verification

FAULT-TRACING FAILED - Verification

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Signal too low. Permanent fault

EFI-411 Throttle position (TP) sensor signal

Checking power cable

- Ignition off.
- Wait approximately 150 seconds (car with immobilizer 245 seconds).
- Disconnect throttle position (TP) sensor.

Note! If the engine cooling fan runs on, it must be allowed to stop before taking resistance readings.

Connect an ohmmeter between throttle position (TP) sensor connector terminal 2 and ground.

The ohmmeter should read 0.4 - 0.8 kohms.

OK - Checking the signal cable

Low - Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for a short-circuit

High - Checking control module connector

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Checking for a short-circuit

- Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 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 control module connector

- Ignition off.
- Throttle position (TP) sensor disconnected.
- Check control module connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Control module connected.
- Ignition on.
Connect a voltmeter between throttle position (TP) sensor connector terminal 2 and ground.

The voltmeter should read approximately 5 V.

OK - The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.
Fault-tracing information

Not OK - Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for an open-circuit

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Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

Continue - FAULT FOUND

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Checking for an open-circuit

- Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 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 the signal cable

- Ignition on.
- Throttle position (TP) sensor disconnected.
Connect a voltmeter between throttle position (TP) sensor connector terminal 3 and ground.

The voltmeter should read approximately 5 V.

OK - Checking throttle position (TP) sensor signal

Not OK - Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
Checking for an open-circuit

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Checking for an open-circuit

- Check cable between throttle position (TP) sensor terminal 3 and control module #A16 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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