P1585

CIRCUIT DESCRIPTION
The PCM uses output driver modules (ODMs) to control many functions of the engine and the transaxle. The ODMs supply the ground path for a PCM controlled device when the PCM commands the device ON. Each ODM is able to control several outputs. Unlike the quad driver modules (QDMs) used in earlier model years, the ODMs are able to diagnose each output circuit. The PCM monitors the ODMs for circuit conditions that are incorrect for the commanded state of the ODM.

CONDITIONS FOR RUNNING THE DTC
^ The engine speed is 450 RPM or more.
^ System voltage is between 8 and 16 volts.

CONDITIONS FOR SETTING THE DTC
^ The PCM detects an improper voltage level on the output circuit that controls the cruise inhibit control circuit.
^ The condition exists for at least 10 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM will store the conditions present when the DTC sets as Fail Records data only.

CONDITIONS FOR CLEARING THE DTC
^ The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using the scan tool's Clear DTC Information function.

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. For example, a failure condition exists if the PCM detects a low voltage level when the device is commanded OFF, or a high voltage level when the device is commanded ON.

If the condition is intermittent, refer to Testing for intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Steps 1-4:

Steps 5-10:

The number(s) below refer to the step number(s) on the diagnostic table.
2. Normally, ignition positive voltage should be present on the control circuit with the PCM disconnected and the ignition turned ON.
3. Tests for a short to voltage on the control circuit.
9. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.