Diagnostic Procedures

Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS INTRODUCTION article. After performing OBD system check, go to next step.

NOTE: If other DTCs are set, diagnose affected DTCs first.

Ensure foot is off the accelerator pedal. Turn on, with engine off. Using scan tool in TAC DATA LIST, monitor APP sensor No. 2 voltage. If voltage reading is 0.5-1.3 volts, go to next step. If voltage reading is not 0.5-1.3 volts, go to step 5.
Fully depress accelerator pedal. If voltage reading is 2.9-4.0 volts, go to next step. If voltage reading is not 2.9-4.0 volts, go to step 5.
Using scan tool, select FAILED THIS IGNITION option. Depress accelerator pedal to Wide Open Throttle (WOT), then release to fully closed position. If this DTC sets, go to next step. If this DTC does not set, see DIAGNOSTIC AIDS .
Replace TAC module. After replacing module, go to next step.
Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within the 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, repeat step 2.
Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTC(s) are displayed, go to applicable DTC test.