## PGM-FI System

#### MIL Circuit Troubleshooting (cont'd)

11-272

54. Check for continuity between ECM/PCM connector terminal A21 and body ground.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there continuity?

YES | - Repair short in the wire between the ECM/PCM (A21) and the MAP sensor, CVT driven pulley speed sensor (CVT), CVT speed sensor 1 (CVT).
NO | - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.

55. Measure voltage between body ground and ECM/PCM connector terminal A20.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES | - Go to step 62
NO | - Go to step 56.

56. Turn the ignition switch OFF.

57. Disconnect the 3P connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A20 with the ignition switch ON (II).

- Exhaust gas recirculation (EGR) valve position sensor
- Knock sensor
- Throttle position (TP) sensor
- CVT drive pulley speed sensor (CVT)
- CVT speed sensor 2 (CVT)

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES | - Replace the sensor that restored about 5 V when disconnected.
NO | - Go to step 58.

58. Turn the ignition switch OFF.
59. Disconnect the 3P connector from the following sensors.

- Exhaust gas recirculation (EGR) valve position sensor
- Knock sensor
- Throttle position (TP) sensor
- CVT drive pulley speed sensor (CVT)
- CVT speed sensor 2 (CVT)

60. Disconnect ECM/PCM connector A (31P).