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. 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.

Turn the ignition switch OFF. 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. Turn the ignition switch OFF. 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) Disconnect ECM/PCM connector A (31P).