Circuit Description
Output driver modules (ODMs) are used by the powertrain control module (PCM) in order to turn on many of the current-driven devices that are needed to control various functions. DTC P1585 set indicates that an improper voltage level has been detected on the output circuit which controls the stepper motor cruise control inhibit circuit.
Conditions for Setting the DTC
| • | The ignition is ON. |
| • | The PCM detects an improper voltage level at the cruise control inhibit signal circuit. |
| • | The above conditions are present 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 which were present when the DTC set as Fail Records data only. This information is not stored as Freeze Frame data. |
Conditions for Clearing the MIL/DTC
| • | A history DTC clears after 40 malfunction free warm-up cycles. |
| • | The PCM receives the clear code command from the scan tool. |
Test Description
The number below refers to the step number on the Diagnostic Table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Cruise Control Schematics | ||||
1 | Did you perform the Cruise Control Diagnostic System Check? | -- | Go to Step 2 | |
Does the voltage measure near the specified value? | B+ | Go to Step 6 | Go to Step 3 | |
3 |
Does the test lamp illuminate? | -- | Go to Step 4 | Go to Step 5 |
4 | Test the cruise control inhibit signal circuit for an open, for a high resistance, for a short to voltage, or for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
5 | Test the ignition 3 voltage circuit for an open, for a high resistance or a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and connect the condition? | -- | Go to Step 10 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the cruise control module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 9 |
8 |
Important:: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls-3.4L or Powertrain Control Module Replacement in Engine Controls-3.8L. Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the cruise control module. Refer to Cruise Control Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
