PINPOINT TEST J : The Memory Seat Does Not Operate Correctly - Does Not Operate Using the Memory Set Switch: Notes
Refer to Memory Seats for schematic and connector information.
Normal Operation and Fault Conditions
When the memory set switch is activated, it supplies a ground signal to the DSM to initiate a memory set or recall command. Memory button 1, 2 and 3 each have separate circuits to the DSM.
The DSM supplies a shared signal return circuit to each position sensor. Each position sensor sends a signal pulse back to the DSM to monitor the position of the seat track and seat recliner. The DSM stores the sensor position data when a set command is received and uses this information to return the seat to the stored position when a recall command is received.
When a recall command is initiated, the DSM supplies voltage and ground to the seat track motors and seat recliner motor to move the seat to the stored position. For information on programming memory positions or recalling a stored memory position, Refer to Memory Position Programming .
The pinpoint test diagnoses a memory seat that does not operate correctly using the memory set switch. If the memory seat does not move in all directions using the seat control switch, GO to Pinpoint Test I .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1534 | Memory 1 Switch Circuit Short To Ground | This DTC sets if a short to ground is sensed on the switch input circuit during the DSM self-test. If activity is sensed on the input circuit for more than 2 minutes, the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored. |
| B1538 | Memory 2 Switch Circuit Short To Ground | |
| B153A | Memory 3 Switch Circuit Short To Ground | |
| B1663 | Seat Driver Front Up/Down Motor Stalled | During self-test, the DSM attempts to operate the appropriate seat track motor and uses the motor's position sensor to monitor movement. If no motor movement is sensed, the DTC is set. The DSM retries motor operation on the next activation of the seat control switch. If no movement continues to be monitored after 250 milliseconds, the DSM disables the output. |
| B1664 | Seat Driver Rear Up/Down Motor Stalled | |
| B1665 | Seat Driver Forward/Backward Motor Stalled | |
| B1666 | Seat Driver Recline Motor Stalled | During self-test, the DSM attempts to operate the recliner motor and uses the recliner motor position sensor to monitor movement. If no motor movement is sensed, the DTC is set. The DSM retries motor operation on the next activation of the seat control switch. If no motor movement is still monitored after 250 milliseconds, the DSM disables the output. |
| B1952 | Seat Rear Up/Down Position Feedback Circuit Short To Battery | This DTC sets if a short to voltage condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1953 | Seat Rear Up/Down Position Feedback Circuit Short To Ground | This DTC sets if a short to ground or open condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1956 | Seat Front Up/Down Position Feedback Circuit Short To Battery | This DTC sets if a short to voltage condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1957 | Seat Front Up/Down Position Feedback Circuit Short To Ground | This DTC sets if a short to ground or open condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1960 | Seat Recline Forward/Backward Position Feedback Circuit Short To Battery | This DTC sets if a short to voltage condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1961 | Seat Recline Forward/Backward Position Feedback Circuit Short To Ground | This DTC sets if a short to ground or open condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1964 | Seat Horizontal Forward/Rearward Position Feedback Circuit Short To Battery | This DTC sets if a short to voltage condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
| B1965 | Seat Horizontal Forward/Rearward Position Feedback Circuit Short To Ground | This DTC sets if a short to ground or open condition is present on the affected motor's position sensor (Hall-effect) feedback circuit. After a DTC is set, a memory recall is not possible but the seat control switch can operate the associated motor in one-second increments. |
Visual Inspection and Diagnostic Pre-Checks
Verify good battery condition before diagnosing the memory seat system. Poor battery condition may interfere with memory seat operation, even if vehicle starting is possible.