Flag 54

Diagnostic Chart.:

Wiring Diagram.:

DESCRIPTION


The five volt reference circuit provides a signal voltage to the handwheel sensor, MAP sensor, and TPS. The return line is grounded through the PCM. Flag 54 detects a short to ground in any of the three, five volt reference circuits or inside the PCM.

INFORMATION FLAG PARAMETERS

Information Flag 54 will set if:


^ MAP sensor signal is zero.


^ Handwheel sensor signal is zero (if equipped).


^ TPS signal is zero.

DIAGNOSTIC AIDS

^ When attempting to diagnose an intermittent problem, use the Scan Tool to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem. Select MALF History from Scan Tool EC menu.


^ Check the tightness of the female terminal grip with a spare male terminal.


^ The engine must meet the flag setting conditions in order to diagnose the code.


NOTICE: Information flags should be used for diagnostic purposes only. They do not necessarily indicate component malfunction/failure.


IMPORTANT: Vehicles without handwheel sensors are still equipped with the wiring for the sensor, Except for the base model ("ZF" 4th and 5th digit of VIN).