## PGM-FI System

#### DTC Troubleshooting (cont'd)

11-58

DTC P0122: TP Sensor Circuit Low Voltage

1. Turn the ignition switch ON(II).

1. Check the throttle position with the scan tool.

   Is there about 10% or 0.5 V when the throttle is fully closed and about 90% or 4.5 V when the throttle is fully opened?

YES - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the TP sensor and at the ECM.

NO - Go to step 3.

1. Turn the ignition switch OFF.

1. Disconnect the TP sensor 3P connector.

1. Turn the ignition switch ON (II).

1. Measure voltage between the TP sensor 3P connector terminals No. 1 and No. 3.

TP SENSOR 3P CONNECTOR

Wire side of female terminals

Is there about 5 V?

YES - Go to step 7.

NO - Go to step 14.

1. Turn the ignition switch OFF.

1. At the sensor side, measure resistance between the TP sensor 3P connector terminals No. 1 and No. 2 with the throttle fully closed.

TP SENSOR 3P CONNECTOR

Terminals side of male terminals

Is there about 0.5 - 0.9 kohms?

YES - Go to step 9.

NO - Replace the throttle body.

1. Measure resistance between the TP sensor 3P connector terminals No. 2 and No. 3 with the throttle fully closed.

TP SENSOR 3P CONNECTOR

Terminals side of male terminals

Is there about 4.5kohms?

YES - Go to step 10.

NO - Replace the throttle body.

1. Disconnect ECM connector A (31P).

a a a