NTC-1A No Trouble Code Menu - Start Here

Diagnostic Chart:

NO TROUBLE CODE TEST MENU

Perform DTC TEST Before Proceeding

First, check all Technical Service Bulletins and Hotline Newsletters that relate to this problem. Perform corrective actions if indicated; otherwise continue.

Second, read Diagnostics Trouble Codes, and repair any Diagnostic Trouble codes before continuing.

1. No Trouble Code Complete Test (non-monitored and monitored circuits) Perform Tests NTC-2A Through NTC-18A in sequence for Driveability problem.

2. No Trouble Code Quick Individual Test. If you suspect a symptom is directly related to a component or system perform the associated NTC-Test(s) individually. Symptom check cannot be used properly unless the Driveabilty problem actually happens while the vehicle is being tested. Review of the appropriate General Information sections is essential before attempting to diagnose any symptom. Return to No Trouble Code Menu if Driveability problem still exists, or perform No Trouble Code Complete Test.

3. No Trouble Code tests NTC-1 9A and NTC-20A are intended to be performed according to the component or system malfunction.

NO TROUBLE CODE MENU

CHECKING SECONDARY IGNITION AND TIMING NTC-2A

CHECKING THE PCM POWER AND GROUND CIRCUITS NTC-3A

CHECKING THE ENGINE VACUUM NTC-4A

CHECKING THE FUEL DELIVERY NTC-5A

CHECKING THROTTLE POSITION SENSOR CALIBRATION NTC-7A

CHECKING MAP SENSOR CALIBRATION NTC-8A

CHECKING THE MINIMUM IDLE AIR FLOW NTC-9A

CHECKING FOR OXYGEN SENSOR SWITCHING NTC-10A

CHECKING THE OXYGEN SENSOR HEATER NTC-11A

CHECKING THE IDLE AIR CONTROL MOTOR NTC-12A

CHECKING THE ENGINE MECHANICAL SYSTEMS NTC-13A

CHECKING THE EVAPORATIVE EMISSION SYSTEM NTC-17A

CHECKING THE EGR SYSTEM NTC-18A

CHECKING THE INTAKE AIR TEMPERATURE SENSOR (2.4L ONLY) NTC-19A

CHECKING THE [1][2]PARK/NEUTRAL POSITION SWITCH NTC-20A

NO TROUBLE CODE TEST MENU Perform DTC TEST Before Proceeding

SUGGESTED SYMPTOM DIAGNOSTIC PATH

SYMPTOM DIAGNOSTIC TEST ROUTINE

HARD START NTC-2A, 4A, 5A, 6A, 7A, 8A, 9A, 10A,
12A,13A,17A, 18A,19A

START AND STALL NTC-2A, 3A, 5A, 6A, 7A, 8A, 9A, 12A

HESITATION/SAG/STUMBLE NO TROUBLE CODE COMPLETE TEST
(STEP 2A THROUGH NTC-20A)

SURGE NTC-2A, 3A, 5A, 6A, 7A, 8A, 9A, 10A,
12A, 17A

LACK OF POWER/SLUGGISH NTC-2A, 3A, 5A, 6A, 7A, 8A, 9A, 10A
12A, 18A

SPARK KNOCK/DETONATION NTC-2A, 3A, 5A, 6A, 7A, 8A, 10A 12A,
13A, 17A

CUTS OUT/MISSES NTC-2A, 3A, 5A, 9A,10A, 18A

BACKFIRE/POPBACK NTC-2A, 3A, 5A, 8A, 9A,10A, 18A

RUNS ROUGH/UNSTABLE/ERRATIC NO TROUBLE CODE COMPLETE TEST
IDLE (STEP 2A THROUGH NTC-20A)

POOR FUEL ECONOMY NO TROUBLE CODE COMPLETE TEST
(STEP 2A THROUGH NTC-20A)