Reading DTCS
- Perform on-board diagnostic system check before diagnosing vehicle using self-diagnostic system. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under DIAGNOSTIC DTC CHARTS.
- Ensure ignition is off. Using a jumper wire, connect between Data Link Connector (DLC) terminals TE1 and E1. See Fig 1 . DLC is located on left strut tower. Turn ignition on and observe Malfunction Indicator Light (MIL) to read DTCs. If DTCs are stored, DTC will flash 3 times starting with the lowest DTC. Proceed to appropriate charts under DIAGNOSTIC DTC CHARTS to diagnose DTCs.
- If no DTCs are stored, remove jumper wire from DLC terminal TE1. Turn ignition switch to LOCK position. Reconnect jumper wire between DLC terminals TE2 and E1. See Fig 1 . Turn ignition on. MIL will flash on and off rapidly.
- Start and run engine until normal operating temperature is obtained. Test drive vehicle at condition at which problem occurred. With ignition still on, connect jumper wire between Data Link Connector (DLC) terminals TE1 and E1, and observe MIL. DTCs will flash if present. Proceed to appropriate charts under DIAGNOSTIC DTC CHARTS to diagnose DTCs.
- If DTCs are not present, ECM and wiring are okay. Proceed to INTERMITTENTS in TESTS W/O CODES - 1.6L article.
NOTE:
Test diagnostic mode will not function if DLC terminal TE2 is grounded with ignition switch in any other position than LOCK. When in test diagnostic mode, DTC 42 will set if vehicle is not driven above 3 MPH, and DTC 43 will set if engine is not cranked. This is considered normal. DTC 51 will set if accelerator pedal depressed off the idle position for 3 seconds, gear selector in Park or Neutral (A/T), or if A/C is on (if equipped). Systems are properly functioning if DTC 51 sets under these conditions.