DTC Test - Checking System For Diagnostic Trouble Codes
NOTE:
Ensure battery is fully charged before proceeding with test.
- Attempt to start engine. Crank engine for up to 10 seconds (if necessary). Diagnostic Trouble Codes (DTCs) may be retrieved using scan tool or Malfunction Indicator Light (MIL) on instrument panel.
- If using MIL on instrument panel to check for DTCs, see USING MALFUNCTION INDICATOR LIGHT (MIL) under RETRIEVING DTCS for proper procedure. Go to step 6).
- If using scan tool to check for DTCs, see USING SCAN TOOL under RETRIEVING DTCS .
- If scan tool displays NO RESPONSE, go to TEST NS-SEL . If scan tool will not power up, check for loose cable connections or bad cable. If cable connections and cable are okay, check voltage at DLC terminal No. 16 (Pink wire). Voltage should be at least 11 volts. If voltage is not as specified, check wiring circuit and necessary fuses. See wiring diagram in the WIRING DIAGRAMS article.
- If scan tool displays an error message, RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE, or LOW OR HIGH BATTERY, this indicates a scan tool failure. To diagnose and correct these conditions, see the VEHICLE COMMUNICATIONS article.
- If DTCs are displayed, see DTC MESSAGES & CODES table and perform appropriate test(s). If no DTCs are displayed, refer to one of the following:
- For driveability problems, perform TEST NTC-1A .
- For no-start problems, perform TEST NS-SEL .
- For speed control problems, refer to the CRUISE CONTROL SYSTEM article in the ACCESSORIES/SAFETY EQUIP section.
- For charging system problems, refer to the GENERATOR & REGULATOR article in the ELECTRICAL section.