Part 3

Signal too low (Continued)

Checking for short-circuit

- Check lead between #A16 and TP sensor terminal 3 for short-circuit to ground as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Press Continue when fault is repaired.

Continue -

-------------------------------------------------

Checking signal lead

- Ignition on.
- Disconnect TP sensor.

- Connect a voltmeter between connector terminal 3 and ground.

Voltmeter should read approx. 0 V.

OK -

Not OK -

-------------------------------------------------

Checking for short-circuit

- Check lead between #A16 and connector terminal 3 for short-circuit to supply as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Press Continue when fault is repaired.

Continue -

-------------------------------------------------

Checking TP sensor signal

- Ignition off.
- Connect TP sensor.

Note! See Communication with control module Communication With Control Module for conditions regarding communication.

Activate instrument, by selecting VST symbol.
- Ignition on.
- Read TP sensor value.

Reading should be approx. 0.4 V at idling and increase to approx. 4.0 V at WOT.

OK - DTC was due to poor connections in TP sensor connector.Treat connector for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Not OK - Try another TP sensor.

-------------------------------------------------

Checking for contact resistance and oxidation
DTC was set due to poor connections in TP sensor connector.
- Treat connector for 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 - FAULT FOUND

-------------------------------------------------

Replacement of component
- Try another TP sensor.

Press Continue when fault is repaired.

Continue -

-------------------------------------------------

Checking TP sensor signal

Hint: TP sensor may break if the signal lead is short-circuited to supply.
Check sensor as below:

- Ignition off.
- Connect TP sensor.

Press Continue.

Continue - FAULT FOUND

-------------------------------------------------

Verification

Verify

Verification

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

- Ignition off.
- Reconnect connectors, components etc.

Note! See Communication with control module Communication With Control Module for conditions regarding communication.

- Activate instrument, by selecting VST symbol.
- Ignition on.
- Read off TP sensor value.

Reading should be approx. 0.4 V at idling and increase to approx. 4.0 V at WOT. The reading should not at any time be approx. 0 V or exceed 4.8 V.

OK - VERIFIED

Not OK - VERIFICATION FAILED

------------------------

VERIFIED - FAULT FOUND

VERIFICATION FAILED -

-------------------------------------------------

Troubleshooting Information
Information
Attempt New Test -

-------------------------------------------------

FAULT FOUND - Verification

No Fault Found - Verification

FAULT-TRACING FAILED - Verification

-------------------------------------------------

Signal too low. Permanent fault

Checking supply lead

- Switch on ignition.
- Disconnect throttle position sensor.

- Connect voltmeter across throttle position sensor connector terminals 1 and 2.

Instrument should indicate approx. 5 V.

OK -

Not OK - Check lead between throttle position sensor connector terminal 2 and MFI module #A2 for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

------------------------

Checking for open-circuit

- Check lead between throttle position sensor connector terminal 2 and MFI module #A2 for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Press Continue when fault is repaired.

Continue -

------------------------

Checking signal lead

- Switch on ignition.
- Disconnect throttle position sensor.

- Connect voltmeter across throttle position sensor contact terminals 1 and 3.

Instrument should indicate approx. 5 V.

OK -

Not OK - Check lead between throttle position sensor connector terminal 3 and MFI module #A1 for short-circuit to ground as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

------------------------

Checking for short-circuit

- Check lead between throttle position sensor connector terminal 3 and MFI module #A1 for short-circuit to ground as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Press Continue when fault is repaired.

Continue -

------------------------

Checking TP potentiometer signal

- Connect throttle position sensor (if disconnected).
- Start engine.

- Read value of throttle position sensor signal.

Value should be approx. 0.5 V at CTP (idling) and increase to approx. 4.2 V at WOT.

OK - DTC is due to poor connection in throttle position sensor connector. Check connector for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Not OK - Try with new throttle position sensor.

------------------------

Checking for contact resistance and oxidation
- DTC is due to poor connection in throttle position sensor connector. Check connector for 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 - FAULT FOUND

------------------------

Replacement of component
- Try with new throttle position sensor.

Press Continue when fault is repaired.

Continue -

------------------------