Retrieving Diagnostic Trouble Codes
NOTE:
Ensure battery is fully charged before retrieving diagnostic trouble codes.
- Turn ignition off. Connect scan tool to Data Link Connector (DLC). DLC is located below driver's side of instrument panel. See Fig 1.
- Turn ignition on. Using scan tool manufacturer's instructions, read and record DTC message (DRB scan tool) or DTC code (generic scan tool) and freeze frame data. On any scan tool, if scan tool displays NO RESPONSE, perform TEST NS-4: NO RESPONSE FROM PCM under DIAGNOSTIC TESTS at end of No Trouble Code (NTC) tests. If scan tool will not power up, check for loose cable connections or bad cable. If cable connections and cable are okay, use voltmeter and check voltage at cavity No. 16 (Red/White wire) on DLC. Voltage should be at least 11 volts. If voltage is not as specified, check wiring circuit and necessary fuses. See WIRING DIAGRAMS article.
- Note DTC messages and codes. See DTC MESSAGES & CODES table.
- If scan tool displays an error message, (i.e., USER-REQUESTED COLD BOOT or USER-REQUESTED WARM BOOT), follow scan tool manufacturer's instructions. Perform appropriate test for displayed DTCs. See appropriate DTC test listed under DIAGNOSTIC TESTS . Once all repairs are made, ensure DTCs are cleared from PCM. See CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM.
- If no DTCs are displayed, refer to one of the following:
- For driveability problems, perform TEST NTC-1: NO TROUBLE CODE TEST MENU located after DTC tests under DIAGNOSTIC TESTS.
- For no-start problems, perform TEST NS-SEL: NO START TEST SELECTION located after No Trouble Code (NTC) tests under DIAGNOSTIC TESTS.
- For speed control problems and additional servicing information, see appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
- For charging system problems and additional servicing information, see GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.