Diagnostic Aids
Caution: Refer to SIR Caution in the Preface section.
Disable the inflatable restraint steering wheel module when performing this diagnostic table. Refer to SIR Disabling and Enabling .
| • | Ensure that the following cruise control switches are not stuck in the engaged position: |
| - | On/off switch |
| - | - SET switch |
| - | + RES switch |
| • | With a scan tool, observe the associated cruise control switch parameter in the Body and Accessories, Cruise Control, BCM data list, while rotating the steering wheel to both steering stops and separately activating each cruise control switch. 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 . |
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Cruise Control Schematics Connector End View Reference: Cruise Control Connector End Views or Engine Control Module Connector End Views for the 2.2L engine. | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
2 |
Does the Cruise Control Switch parameter display Off? | -- | Go to Step 3 | Go to Step 6 | ||||||
3 |
Does the Cruise Control Switch parameter display On? | -- | Go to Step 4 | Go to Step 7 | ||||||
4 |
Does the Cruise Control Switch parameter display Set? | -- | Go to Step 5 | Go to Step 9 | ||||||
5 |
Does the Cruise Control Switch parameter display Resume? | -- | Go to Diagnostic Aids | Go to Step 9 | ||||||
6 |
Does the Cruise Control Switch parameter display Off? | -- | Go to Step 10 | Go to Step 15 | ||||||
7 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 19 | ||||||
8 |
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.
Do the cruise control function switch resistance values measure between the specified values? | Off = O.L. On = 7.8-8.6 K ohms Resume = 2.7-3.0 K ohms Set = 1.2-1.3 K ohms | Go to Step 16 | Go to Step 12 | ||||||
9 |
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.
Do the cruise control function switch resistance values measure between the specified values? | Off = O.L. On = 7.8-8.6 K ohms Resume = 2.7-3.0 K ohms Set = 1.2-1.3 K ohms | Go to Step 18 | Go to Step 17 | ||||||
10 | Test the cruise control on switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 11 | ||||||
11 | Test the cruise control set/coast and resume/accelerate switch signal circuit for a short to voltage between C1 and the cruise control switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 17 | ||||||
12 | Test the ignition 1 voltage circuit for an open or for a high resistance between C1 and the cruise control switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 13 | ||||||
13 | Test the cruise control set/coast and resume/accelerate switch signal circuit between C1 and the cruise control switch for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 14 | ||||||
14 | Test the cruise control on switch signal circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 17 | ||||||
15 | Test the cruise control set/coast and resume/accelerate switch signal circuit for a short to voltage between C1 and the engine control module (ECM). Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 18 | ||||||
16 | Test the cruise control set/coast and resume/accelerate switch signal circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 18 | ||||||
17 | Inspect for poor connections at the harness connector of the cruise control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 20 | ||||||
18 | Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 22 | Go to Step 21 | ||||||
19 | Repair the following in the ignition 1 voltage circuit:
Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | -- | Go to Step 22 | -- | ||||||
20 | Replace the cruise control switch. Refer to Steering Wheel Control Switch Assembly Replacement . Did you complete the replacement? | -- | Go to Step 22 | -- | ||||||
21 | Replace the ECM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 22 | -- | ||||||
22 |
Does the cruise control system operate properly? | -- | System OK | Go to Step 2 | ||||||
