• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
Driver Seat Front Vertical Motor Down Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2355 5A |
Driver Seat Front Vertical Motor Up Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2355 5A |
Driver Seat Rear Vertical Motor Down Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2365 5A |
Driver Seat Rear Vertical Motor Up Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2365 5A |
Driver Seat Horizontal Motor Forward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2375 5A |
Driver Seat Horizontal Motor Rearward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2375 5A |
Driver Seat Recline Motor Forward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1825 5A |
Driver Seat Recline Motor Rearward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1825 5A |
Driver Seat Lumbar Motor Forward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
Driver Seat Lumbar Motor Rearward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
1. Power seat motor inoperative |
The memory seat module (MSM) monitors the current supplied to the seat adjuster motors. The MSM can detect both absolute and differential current levels from the seat motors. Absolute current is the maximum allowable current the module will supply to the motors. A differential current mismatch occurs when the current supplied to the seat motors does not match the current returning from the motors.
The driver seat cushion motors or the lumbar horizontal motor must be active.
Current out of the module does not match the current returning to the module within 5 amps.
The absolute current or an over-current has exceeded the maximum value allowed.
This DTC will set if the module calibration is not programmed.
This DTC will set if the module calibration is out of range.
All movement related to the driver seat adjuster motors are disabled.
• | The current DTC will clear and set the code to history, 3 seconds after no motor movement is requested or the current is no longer mismatched, and the ignition is cycled OFF then back to ACC or RUN. |
• | The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred. |
Control Module References for scan tool information
• | Driver seat front vertical motor |
• | Driver seat rear vertical motor |
• | Driver seat horizontal motor |
• | Driver seat recline motor |
• | Driver seat lumbar horizontal motor |
⇒ | If the DTC sets, test for a short between the appropriate motor control circuits listed below. If the circuits test normal, replace the MSM. |
• | Front vertical motor terminal 1 and terminal 2 |
• | Rear vertical motor terminal 1 and terminal 2 |
• | Seat horizontal motor terminal 1 and terminal 2 |
• | Seat recline motor terminal 1 and terminal 2 |
• | Lumbar horizontal motor terminal 1 and terminal 5 |
• | Front vertical motor terminal 1 and terminal 2 |
• | Rear vertical motor terminal 1 and terminal 2 |
• | Seat horizontal motor terminal 1 and terminal 2 |
• | Seat recline motor terminal 1 and terminal 2 |
• | Lumbar horizontal motor terminal 1 and terminal 5 |
Verify that DTC B1335 42 or B1335 4B is not set.
⇒ | If either DTC is set, replace the MSM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for MSM replacement, setup, and programming |