B1334

Steps 1-11:

Schematic:

CIRCUIT DESCRIPTION
The passenger temperature control is a sliding potentiometer with detents that correspond to fixed resistance values. The heater and A/C programmer determines which switch position has been selected by the voltage drop across the corresponding resistance value.

CONDITIONS FOR RUNNING THE DTC
The ignition is turned ON.

CONDITIONS FOR SETTING THE DTC
The heater and A/C programmer detects that the signal circuit of the passenger temperature control is less than 0.09 V (5 counts) or greater than 4.90 V (250 counts).

ACTION TAKEN WHEN THE DTC SETS
The heater and A/C programmer will ignore the passenger temperature control. The data displayed on the scan tool, 3.19 V (163 counts) in the HVAC System Data list, will be the default value.

CONDITIONS FOR CLEARING THE DTC
^ The DTC will become history if the heater and A/C programmer no longer detects a failure.
^ The history DTC will clear after 50 fault free ignition cycles.
^ The DTC can be cleared with a scan tool.

Diagnostic Aids:

DIAGNOSTIC AIDS
Refer to Testing for Intermittent and Poor Connections