P1523

CIRCUIT DESCRIPTION
During Battery Saver Mode the TAC module determines if the throttle plate is returning to the correct de-energized position. If this fault is detected the TAC module sends a message to the PCM across serial data and this DTC is set.

CONDITIONS FOR RUNNING THE DTC
^ DTC P1518 is not set.
^ The ignition is ON and the engine is OFF.
^ The ignition voltage is more than 8.5 volts.
^ Battery Saver Mode is active.

CONDITIONS FOR SETTING THE DTC
The TAC module detects that the commanded and actual throttle positions are not within a calibrated range of each other.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM will store conditions which were present when the DTC set as Failure Records data only. This information will not be stored as Freeze Frame data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
If you do not find any trouble, inspect for mechanical problems or binding that may be temperature related. Components may not move freely in extreme heat or cold due to the presence of contaminants or ice formation.

The following could cause an intermittent condition:

TEST DESCRIPTION

Diagnostic Chart:

The numbers below refer to the step numbers on the diagnostic table.
8. When the TAC module detects a problem within the ETC System the PCM receives a message across serial data and more than one ETC System related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing one individual problem may correct more than one DTC. keep this in mind when reviewing captured DTC info.