Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
DTC P1585 - Cruise Control Inhibit Control Circuit
| 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 | Go to Diagnostic System Check - Cruise Control (3.4L) or Diagnostic System Check - Cruise Control (3.6L) |
| 2 |
|
B+ | Go to Step 4 | Go to Step 3 |
| 3 | Test the cruise control inhibit signal circuit for an open, for a high resistance or for a short to ground between C103 and the cruise control module. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 9 | Go to Step 6 |
| 4 | Test the cruise control inhibit signal circuit for an open, for a high resistance, or for a short to ground between C103 and the PCM. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 9 | Go to Step 5 |
| 5 | 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 9 | Go to Step 7 |
| 6 | 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 8 |
| 7 |
IMPORTANT:
Program the replacement PCM. Refer to Service Programming System (SPS)
in Programming. Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls-3.4 L.Did you complete the replacement? |
- | Go to Step 9 | - |
| 8 | Replace the cruise control module. Refer to Cruise Control Module Replacement . Did you complete the replacement? |
- | Go to Step 9 | - |
| 9 |
|
- | Go to Step 2 | System OK |