1. Disconnect the 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).
   - Accelerator pedal position (APP) sensor
   - EGR valve (K20Z2 engine)
   - Output shaft (countershaft) speed sensor

Is there about 5 V?

YES | - | Replace the sensor that restored 5 V when disconnected.■
NO | - | Go to Step 74 .

1. Turn the ignition switch OFF.

1. Jump the SCS line with the HDS.

1. Disconnect the connector from these sensors:
   - Accelerator pedal position (APP) sensor
   - EGR valve (K20Z2 engine)
   - Output shaft (countershaft) speed sensor

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