Conditions

Throttle Position Sensor 1 and 2 Circuit. Sum Out of Range.





Fault symptoms
- CHECK ENGINE.
- Idling speed incorrect.
- Cruise control not working.

On-Board Diagnostics
Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:
- Ignition in ON position.

Fault criteria:
- Sum of voltages from throttle position sensors 1 and 2 exceeding 5.70 V or below 4.59 V.

Dependents:
- None.

System reaction to a fault:
- Throttle control goes into limp-home mode. The limp-home solenoid will be activated 5 times in succession each time the ignition is turned on until the fault has been rectified and the trouble codes cleared.

OK report:
- Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.

Fault handling: See next line.

- CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.

Diagnostic help
Fault diagnosis concerns electrical fault in connecting leads or in one of the sensors.
Functions in the diagnostic tool related to the fault:
- Throttle Position Sensor 1, unit V.
- Throttle Position Sensor 2, unit V.

Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.

Proceed to Diagnostic Procedures Checking the Sensor's Grounding