Diagnostic Aids
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
- With a scan tool, observe the cruise control function switch parameters, in the Body and Accessories Cruise Control data list, while rotating the steering wheel to both steering stops and individually activating each cruise control function switch separately. This will help eliminate the possibility of an internally shorted inflatable restraint steering wheel module coil.
- For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
DTC P0564
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Cruise Control Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
B+ | Go to Step 3 | Go to Step 8 |
| 3 |
IMPORTANT:
The cruise control on/off switch must be turned ON in order to correctly view the set/coast switch and the resume/accel switch resistance values with the DMM.
|
Off = O.L. On = 7.8 K-8.6 K Ω Resume = 2.7 K-3.0 K Ω Set = 1.2 K-1.3 K Ω |
Go to Step 4 | Go to Step 5 |
| 4 | Test the cruise control set/coast and resume/accelerate switch signal circuit for a high resistance, for a short to voltage or for a short to ground between the cruise control switch and the powertrain control module (PCM)/engine control module (ECM). Refer to Circuit Testing
and to Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 7 |
| 5 | Test the cruise control set/coast and resume/accelerate switch signal circuit for a high resistance, for a short to voltage or for a short to ground between the cruise control switch and the cruise control switch connector. Refer to Circuit Testing
and to Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 6 |
| 6 | Inspect for poor connections at the harness connector of the cruise control switch. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 9 |
| 7 | Inspect for poor connections at the harness connector of the PCM/ECM. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 10 |
| 8 | Repair the high resistance in the ignition 1 voltage circuit. Refer to Circuit Testing
and to Wiring Repairs
. Did you complete the repair? |
- | Go to Step 11 | - |
| 9 | Replace the cruise control switch. Refer to Cruise Control Switch Replacement . Did you complete the replacement? |
- | Go to Step 11 | - |
| 10 | Replace the PCM/ECM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
- | Go to Step 11 | - |
| 11 |
|
- | Go to Step 2 | System OK |