B1546

DTC B1546

CIRCUIT DESCRIPTION
When the rear folding seat stow or recline switches are pressed they send a 12-volt signal through the switch signal circuit to the rear seat module (RSM). The RSM then commands the rear folding seat to move in response to the switch inputs.

DTC DESCRIPTORs
This diagnostic procedure supports the following DTCs:
- DTC B1545 Seat Stow Switch 1 Circuit
- DTC B1546, Seat Stow Switch 2 Circuit
- DTC B3729 Seat Recline Control Switch

CONDITIONS FOR RUNNING THE DTC
The RSM must be powered and cannot have DTC B1327 - Battery Voltage Low as an active DTC for this DTC to set.

CONDITIONS FOR SETTING THE DTC
- If a seat switch continues to be active for 15 seconds after a motor controlled by that switch reaches the end of its travel, the switch will be considered shorted and the RSM will set a switch DTC.
- If a position sensor DTC is current and the associated switch is active for 30 continuous seconds, the switch will be considered shorted and the RSM will set a switch DTC.

ACTION TAKEN WHEN THE DTC SETS
- Motor outputs being driven in response to the failed switch will be de-activated.
- The RSM will respond to any other switch signal that has not set a DTC.

CONDITIONS FOR CLEARING THE DTC
The DTC automatically clears when the switch circuit setting the DTC is no longer active.

TEST DESCRIPTION

Steps 1 - 10:

The numbers below refer to the step numbers on the diagnostic table.
2. Checks the existing state of the third row seat switch by using the current state of the switch parameter.
4. When the stow recline switch is disconnected, this step determines if the switch contacts are stuck closed, or if the switch signal circuit is possibly shorted to battery voltage.