P1654

DTC P1654 Check Throttle Circuit






Circuit Description

A dash light is illuminated by the PCM if diagnostics have detected certain errors related to the Accelerator Pedal Position (APP) sensor. Illumination is accomplished by the PCM providing a ground path for the light circuit. This is a type D DTC.

Conditions for Setting the DTC

^ Check Throttle lamp requested "ON".
^ Voltage at the Check Throttle control circuit is greater than 0 volts.
or
^ Check Throttle lamp requested "OFF".
^ Voltage at the Check Throttle control circuit is equal to 0 volts.

Action Taken When the DTC Sets

Will not turn "ON" the MIL.

Conditions for Clearing the MIL/DTC

^ The PCM will turn the MIL off after three consecutive trips without a fault condition.
^ A History DTC will clear when forty consecutive warm-up cycles that the diagnostic does not fail (coolant temperature has risen 5°C (40°F) from start up coolant temperature and engine coolant temperature exceeds 71°C (160°F) that same ignition cycle).
^ Use of a scan.

Diagnostic Aids

A faulty bulb or the control circuit shorted to ground will cause a P1654 to set.

Test Description

Number(s) below refer to the number(s) on the diagnostic table.

2. This test checks the ability of the PCM to command the Check Throttle lamp on during the bulb check (Check Throttle lamp should be "ON" for 2 seconds and then go out).

3. This test will check the control circuit for a short to ground.

6. This test will check the control circuit for an open.