Component Testing
WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Refer to SIR Caution
.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling .
IMPORTANT:
The cruise control switch must be ON in order to properly measure the resistance of the - SET, the + RES, and the Cancel switches.
- With the ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
- With the ignition OFF, disconnect C277 at the inflatable restraint steering wheel module coil.
- Measure the resistance between terminals 1 and 3 at the cruise control switch side of the connector. Individually activate and hold each cruise control function switch and compare the resistance reading to the values on the schematic for the ON/OFF, - SET, and the + RES switches.
- If any of the resistance measurements for the OFF, ON, - SET, and + RES switches are not within the listed resistance values, replace the cruise control switch assembly.
- Measure the resistance between terminals 1 and 5 at the cruise control switch side of the connector. Activate and hold the cruise cancel switch and compare the resistance reading to the value of the Cancel switch listed below.
- If the Cancel switch is not within the listed resistance value, replace the cruise control switch assembly.
Cruise Control Inoperative/Malfunctioning
| Function Switch | Minimum Resistance Value | Maximum Resistance Value |
|---|---|---|
| OFF | O.L. | O.L. |
| ON | 7.8k Ohms | 8.6k Ohms |
| - SET | 1.2k Ohms | 1.3k Ohms |
| + RES | 2.7k Ohms | 3.0k Ohms |
| Cancel | 0.0k Ohms | 0.5k Ohms |