Normal Operation

To tilt the steering column up, the power column tilt switch provides a ground path for the Driver Seat Module (DSM) along circuit CPP14 (BN/WH), through the power column tilt switch and finally along circuit GD133 (BK). The DSM then provides voltage to the power column tilt motor along circuit CPP04 (GY) and back into the DSM along circuit CPP05 (WH/VT).

To tilt the steering column down, the power column tilt switch provides a ground path for the DSM along circuit CPP15 (YE/VT), through the power column tilt switch and finally along circuit GD133 (BK). The DSM then provides voltage to the power column tilt motor along circuit CPP05 (WH/VT) and back into the DSM along circuit CPP04 (GY).

The power tilt switch is not serviceable. If a new switch is needed, then a new steering column lower shroud must be installed.

• DTC B2A42 (Tilt Steering Column Up Switch Circuit Short to Ground) - If, during the self-test or normal operation, the DSM determines the UP switch to be in the active position for more than 2 minutes, the DSM detects a short to ground on circuit CPP12 (BN/GN), or the UP switch is active when the DOWN switch is also active (by design, the switch cannot be in both positions at the same time), DTC B2A42 will be set.
• DTC B2A43 (Tilt Steering Column Down Switch Circuit Short to Ground) - If, during the self-test or normal operation, the DSM determines the DOWN switch to be in the active position for more than 2 minutes, the DSM detects a short to ground on circuit CPP15 (YE/VT)/CPP13 (GY/OG), or the DOWN switch is active when the UP switch is also active (by design, the switch cannot be in both positions at the same time), DTC B2A43 will be set.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Power column tilt switch
• DSM