Circuit Description
The TPS is variable resistor that monitors throttle opening. The ECM determines vehicle driving condition and adjusts air-fuel mixture accordingly. Code is set when ECM detects open or short in TPS circuit. Possible causes are:
- TPS sensor open or short circuit.
- TPS sensor malfunction.
- ECM.
NOTE:
If codes 22, 24 and 41 are output together, inspect ECM terminal E2 (ground) circuit. Repair as needed. See wiring diagram in the WIRING DIAGRAMS
section.
NOTE:
When diagnosing ECM circuits, manufacturer recommends using test harness (09990-01000).