"Check Engine" Light On, Led Does Not Flash
- Attempt to start engine. If engine will not start, go to step 2). If engine starts, turn ignition off. Disconnect connector "B" from ECU. Verify if "CHECK ENGINE" light comes on. If light comes on, repair short to ground in Green/Orange wire between ECU terminal B6 and combination meter. If not, substitute a known good ECU. If condition is rectified, replace original ECU.
- Turn ignition on. Disconnect MAP sensor and then throttle angle sensor connector one at a time. If light remains on, go to step 3). If light goes out when either sensor is disconnected, replace sensor.
- If "CHECK ENGINE" light stays on from step 2), disconnect the Atmospheric Pressure (PA) sensor. If LED flashes Code 13, replace PA sensor. If Code 13 is not indicated, turn ignition off and go to next step.
- Connect ECU test harness to main harness side of ECU. Individually, check continuity between ECU test harness terminals C13, C15, and ground. See Figure . If continuity is not present, go to step 5). If continuity is present, repair short to ground in Red wire between ECU terminal C15 and MAP sensor or Yellow/Red wire between ECU terminal C13 and PA sensor or throttle angle sensor.
- Reconnect sensor connectors. Connect ECU test harness connectors "A", "B" and "C" between ECU and ECU connectors. Turn ignition on. Individually, measure voltage between ECU terminals A16, A18, and ground. If voltage is greater than one volt, repair open in wire between ECU terminal A16 or A18 and ground (at thermostat housing).
- If less than one volt was present, measure voltage between ECU terminals A13 (pos.) and A18 (neg.). If battery voltage is now present, substitute a known good ECU. If condition is rectified, replace original ECU.
- If battery voltage is not present, repair Yellow/Black wire between ECU terminals A13, A15, or main relay. If battery voltage is now present, substitute a known good ECU. If condition is rectified, replace original ECU.