Disconnect the TPS (throttle position sensor) connector. Turn the ignition switch ON (II). Measure the voltage between the No. 1 and No. 3 terminals of the TPS connector. TPS CONNECTOR Wire side of female terminals Is there about 5 V? YES - Check for an open or a short in the wire between PCM connector terminal A15 and the TPS. If wire is OK, replace the TPS. NO - Go to step 20. Turn the ignition switch OFF. Disconnect PCM connector A (31P). Check for continuity between the No. 1 terminal of TPS connector and body ground and between the No. 3 terminal and body ground. TPS CONNECTOR Wire side of female terminals Is there continuity? YES - Check for a short to ground in the wires between the No. 1 and No. 3 terminals of TPS connector and ground. If the wires are OK, replace the PCM. NO - Go to step 23.

Reconnect the PCM connector A (31P) and TPS connector. Disconnect the shift lock solenoid/D3 switch connector. Turn the ignition switch ON (II). Press the brake pedal and measure the voltage between No. 1 terminal of the shift lock solenoid/D3 switch connector and body ground. SHIFT LOCK SOLENOID/D3 SWITCH CONNECTOR Wire side of female terminals Is there battery voltage when pressing the brake pedal? YES - Go to step 27. NO - Repair open or short in the wire between the No. 1 terminal of the shift lock solenoid/D3 switch connector and the multiplex control unit.