WIS Document: 17954

| | Checking the grounding | 1. | Connect a BOB and check whether voltage is present on pin 20 by taking a reading across pin 20 and battery positive. The reading should be 12 V. | Important | Disconnect the battery cable before removing the grounding point. If this is not done the control modules in the car could be rendered unserviceable. | | 2. | If the voltage reading is not OK, check the wiring for continuity/shorting. Also inspect grounding point G3S visually, unscrew and clean the contact surfaces. Reconnect the grounding point and battery cable, and repeat point 1.