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 open or short circuit.
- TPS 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
article.
NOTE:
When diagnosing ECM circuits, manufacturer recommends using Test Harness (09990-01000).