Diagnostic Procedures
- If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
- Turn ignition on, ensuring foot is off accelerator pedal. Using scan tool, observe APP sensor 2 voltage. If voltage is 0.7-1.1 volts, go to next step. If voltage is not 0.7-1.1 volts, go to step 5.
- Fully depress the accelerator pedal. If voltage changes to 2.7-4.2 volts, go to next step. If voltage does not change to 2.7-4.2 volts, go to step 5.
- Monitor DTC info for this DTC. Depress accelerator pedal to Wide Open Throttle (WOT) and then return pedal to closed throttle. If DTC fails this ignition, go to next step. If DTC does not fail this ignition, go to DIAGNOSTIC AIDS .
- Replace TAC module. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to next step.
- Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step 2.
- Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.