The PCM inhibits cruise control operation when certain conditions are detected.
The PCM removes the ground for the cruise control inhibit signal circuit in order to disengage cruise control operation. The cruise control module monitors the cruise control inhibit signal circuit in order to determine when to inhibit cruise. When the cruise control module activates cruise control operation, the CCM provides a ground for the cruise control engaged signal circuit. The PCM monitors the cruise control engaged signal circuit in order to determine that the cruise control is engaged.
The PCM inhibits cruise control operation by removing the ground for the cruise control inhibit signal circuit.
The PCM detects a voltage on the cruise engaged signal circuit when the PCM inhibits cruise control operation.
The PCM stores the conditions present when the DTC set as Failure Records data only.
• | The history DTC clears after 40 malfunction free warm-up cycles. |
• | The PCM receives a clear code command from the scan tool. |
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Cruise Control Schematics | |||
1 | Did you perform the Cruise Control Diagnostic System Check? | Go to Step 2 | |
2 |
Does the Cruise Control Active parameter display Yes? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 |
Does the Cruise Control Active parameter display YES? | Go to Step 4 | Go to Step 5 |
4 |
Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
5 | 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 9 | Go to Step 7 |
6 | Inspect for poor connection 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 9 | Go to Step 8 |
7 | Replace the cruise control module. Refer to Cruise Control Module Replacement . Did you complete the replacement? | Go to Step 9 | -- |
8 |
Important: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls-3.8L. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |