Diagnostic Aids

Malfunction code will set if closed throttle switch is set to on and input voltage is more than 2 volts for 4 seconds, or voltage is less than 0.2 volts for 4 seconds. Also code will set if input voltage is higher than 4.6 volts for 4 seconds. Check for following possible problems:

• Open or short between Throttle Position (TP) sensor and Engine Control Module (ECM).
• Open or short between TP sensor and ECM.
• Short between TP sensor wires.
• Misplaced, loose or corroded TP sensor terminals.
• Faulty TP sensor.