Circuit/System Verification
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, observe the scan tool internal mode switch parameters while moving the gear shift lever from Park, through all gear selector positions, and back to Park. The parameters should match each gear range that is selected. Refer to Internal Mode Switch table below:
Internal Mode Switch Parameters
| Parameter | Selector Position | ||||
|---|---|---|---|---|---|
| Park | Reverse | Neutral | Drive | Manual | |
| Internal Mode Switch D1 | HIGH | HIGH | LOW | LOW | LOW |
| Internal Mode Switch D2 | LOW | LOW | HIGH | HIGH | HIGH |
| Internal Mode Switch R1 | HIGH | LOW | LOW | HIGH | HIGH |
| Internal Mode Switch R2 | LOW | HIGH | HIGH | LOW | LOW |
| Internal Mode Switch Start | LOW | HIGH | LOW | HIGH | HIGH |