P1585

DTC P1585

CIRCUIT DESCRIPTION
The PCM removes the ground from the cruise control inhibit signal circuit when it determines that conditions exist for which cruise control should not be enabled. The PCM also monitors the voltage on this circuit in order to determine if a fault exists.

CONDITIONS FOR RUNNING THE DTC
- The engine speed is greater than 450 RPM.
- The ignition is ON.
- The system voltage is between 8 volts and 16 volts.

CONDITIONS FOR SETTING THE DTC
- The PCM detects that an improper voltage exists on the cruise control inhibit signal circuit.
- The condition exists for at least 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The PCM does not illuminate the malfunction indicator lamp (MIL).
- The PCM stores the conditions present when the DTC set as Failure Records data only.

CONDITIONS FOR CLEARING THE DTC
- The history DTC clears after 40 malfunction free warm-up cycles.
- The PCM receives a clear code command from the scan tool.

DIAGNOSTIC AIDS
In order to determine whether an improper voltage level exists on the output circuit, the PCM compares the voltage level to the commanded state.

If the condition is intermittent, refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST

Steps 1-6:

Steps 7-9: