Power Seats Diagnosis

Diagnostic Trouble Code Chart:

Wiring Schematic:

CIRCUIT DESCRIPTION
Battery positive voltage (B+) is supplied to the Memory Seat Module (MSM) via CKT 1840 (ORN). The MSM monitors this voltage to determine if it is within a valid operating range.

CONDITIONS FOR SETTING THE DTC
The battery positive voltage (B+) level rises above 15.5 volts for more than approximately 1.2 seconds.

ACTION TAKEN WHEN THE DTC SET
^ Stores a DTC B1982 in the MSM memory.
^ The MSM will not respond to any manual, or memory inputs when the voltage is greater than 16 volts.
^ No driver warning message will be displayed for this DTC.
^ The MSM switch failure and position sensor failure DTCs will not set while DTC B1982 is current.

CONDITIONS FOR CLEARING THE DTC
^ The battery positive voltage (B+) level falls below 15 volts for approximately 1.2 seconds.
^ Use the On-Boards clearing DTCs feature.
^ Use a scan tool.

DIAGNOSTIC AIDS
This DTC may set when the vehicle is placed on a battery charger, on fast charge, for a long period of time.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
1. Perform the entire Power Seat Systems Diagnostic System Check before continuing with the diagnosis of this DTC.
2. Checks that DTC was not set erroneously.
3. Determines whether the malfunction is in the charging system or the MSM.
5. Clear all DTCs after the repair procedure is complete.