Diagnostic Aids
The following are the correct switch resistance value ranges and the correct counts that are displayed in the Cruise parameter in the Body and Accessories / Cruise Control / IPM / Inputs data list, when each switch is pressed individually. If no switch is pressed the resistance value should be infinite.
Switch Function | Resistance Value Range (ohms) | Counts |
|---|---|---|
OFF | O.L. | 0 |
On | 7.8-8.6K ohms | 29 |
Resume | 2.7-3.0K ohms | 76 |
Set | 1.2-1.3K ohms | 148 |
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 | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
2 |
Does the test lamp illuminate? | -- | Go to Step 3 | Go to Step 7 | ||||||
3 |
Important: The cruise control on/off switch must be turned ON in order to correctly view the set/coast resistance value 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 4 | Go to Step 5 | ||||||
4 | 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 10 | Go to Step 6 | ||||||
5 | 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 10 | Go to Step 8 | ||||||
6 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 9 | ||||||
7 | Repair the following in the remote radio control head accessory supply voltage circuit:
Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | -- | Go to Step 10 | -- | ||||||
8 | Replace the cruise control switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- | ||||||
9 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 10 | -- | ||||||
10 | Operate the vehicle within the conditions for cruise control operation. Does the cruise control system operate properly? | -- | System OK | Go to Step 2 | ||||||
