Diagnostic Instructions
| • | 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. |
DTC Descriptors
DTC B1335 0B: Device Power 3 Circuit Current Above ThresholdDTC B1335 42: Device Power 3 Circuit Calibration Data Set Not Programmed
DTC B1335 4B: Device Power 3 Circuit Calibration Not Learned
Diagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
Driver Seat Front Vertical Motor Down Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2355 5A |
Driver Seat Front Vertical Motor Up Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2355 5A |
Driver Seat Rear Vertical Motor Down Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2365 5A |
Driver Seat Rear Vertical Motor Up Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2365 5A |
Driver Seat Horizontal Motor Forward Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2375 5A |
Driver Seat Horizontal Motor Rearward Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B2375 5A |
Driver Seat Recline Motor Forward Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1825 5A |
Driver Seat Recline Motor Rearward Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1825 5A |
Driver Seat Lumbar Motor Forward Control | B3920 02 | B1335 0B | 2 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
Driver Seat Lumbar Motor Rearward Control | B3920 02 | B1335 0B | 2 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
1. Power seat motor inoperative 2. Lumbar horizontal motor inoperative | |||||
Circuit/System Description
The memory seat module (MSM) monitors the current supplied to the driver seat adjuster motors, recline motor, and the lumbar horizontal motor. It 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.
Conditions for Running the DTC
The driver seat adjuster motors, recline motor, or the lumbar horizontal motor must be active.
Conditions for Setting the DTC
B1335 0B
The differential current measured through the high and low side of the power rail is within tolerance of each other, but the absolute current or an over-current has exceeded the maximum value.
B1335 42
This DTC will set if the module calibration is not programmed.
B1335 4B
This DTC will set if the module calibration is out of range.
Action Taken When the DTC Sets
All movement related to the seat cushion and recline motors is aborted.
Conditions for Clearing the DTC
| • | 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 power mode changes to OFF then back to ACC or RUN. |
| • | The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred. |
Diagnostic Aids
The scan tool may reference the Memory Seat Module (MSM) as the Driver Position Module.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Memory Seats Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
B1335 0B
- Ignition ON, use a scan tool to clear the current and history diagnostic trouble code.
- Determine which motor set this DTC by operating the motors listed below one at a time in both directions. Check for the DTC to set between each motor test.
- Clear the diagnostic trouble code.
- Ignition OFF, disconnect the harness connector at the appropriate seat or lumbar motor for which the DTC set.
- Ignition ON, operate the motor adjuster switch in both directions. DTC B1335 0B should not set.
- Test the appropriate control circuits listed below for a high resistance.
- If all circuits test normal, test or replace the appropriate seat or lumbar motor.
| • | 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. |
| • | Driver seat front vertical motor terminal 2 X1 and terminal 5 X1 |
| • | Driver seat horizontal motor terminal 3 X1 and terminal 6 X1 |
| • | Driver seat rear vertical motor terminal 1 X1 and terminal 4 X1 |
| • | Driver seat recline motor terminal A and terminal B X1 |
| • | Driver seat lumbar horizontal motor terminal A and terminal B |
| • | Driver seat front vertical motor terminal 2 X1 and terminal 5 X1 |
| • | Driver seat horizontal motor terminal 3 X1 and terminal 6 X1 |
| • | Driver seat rear vertical motor terminal 1 X1 and terminal 4 X1 |
| • | Driver seat recline motor terminal A and terminal B X1 |
| • | Driver seat lumbar horizontal motor terminal A and terminal B |
B1335 42 or B1335 4B
If either DTC is set history or current, replace the MSM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for MSM replacement, setup, and programming |
