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The DTC automatically clears when the switch circuit setting the DTC is no longer active.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
The numbers below refer to the step numbers on the diagnostic table.
-
Checks the existing state of the third row seat switch by using the current state of the switch parameter.
-
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.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Rear Seat Schematics Connector End View Reference: Power Seat Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
Does the scan tool display Active? | Go to Step 4 | Go to Step 3 | |
3 |
Does the switch parameter change state? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
Does the scan tool display Inactive for the switch parameter? | Go to Step 7 | Go to Step 5 | |
5 | Test the switch signal circuit that displays active for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the rear seat module (RSM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the appropriate rear seat stow or recline switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
8 | Replace the RSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | -- |
9 | Replace the appropriate stow or recline switch. Refer to Rear Seat Number 2 Folding Actuator Switch Replacement - Rear Quarter Trim Rear or Rear Seat Number 2 Folding Actuator Switch Replacement - Rear Quarter Trim Front . Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the DTC reset? | Go to Step 2 | System OK |
