PINPOINT TEST I : The Memory Seat is Inoperative or Does Not Operate Correctly - Does Not Operate Horizontally, Vertically or Recline: Notes
Refer to Memory Seats for schematic and connector information.
Normal Operation and Fault Conditions
The seat control switch supplies voltage and ground to the applicable DSM inputs. The DSM then supplies voltage and ground to the appropriate seat track motor or seat recliner motor to move the seat in the desired direction. There are 3 seat track motors that combine to move the seat horizontally (forward/backward) and vertically (front up/down and rear up/down). The seat recliner mechanism uses a single motor to pivot the seat backrest forward and backward.
Each motor in the memory power seat track and power recliner contains a Hall-effect position sensor. The DSM provides a signal supply circuit to each position sensor and a shared reference signal return circuit. Each position sensor sends a signal voltage back to the DSM used to monitor the position of the power seat and seat backrest. The DSM uses this information to return the seat to a stored pre-programmed position when using the memory set switch or the RKE feature. 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 in one or more directions when using the seat control switch. If the memory seat moves in all directions using the seat control switch, GO to Pinpoint Test J .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| 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 | 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. |
| B1665 | Seat Driver Forward/Backward 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. |
| 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. |
| B1703 | Seat Driver Recline Forward Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage is sensed on the input circuit for greater than 2 minutes the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored. |
| B1707 | Seat Driver Recline Rearward Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage is sensed on the input circuit for greater than 2 minutes the DTC is set as continuous. With the DTC set, any input signal on the circuit is ignored. |
| B1711 | Seat Driver Front Up Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage 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. |
| B1715 | Seat Driver Front Down Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage 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. |
| B1719 | Seat Driver Forward Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage 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. |
| B1723 | Seat Driver Rearward Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage 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. |
| B1727 | Seat Driver Rear Up Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage 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. |
| B1731 | Seat Driver Rear Down Switch Circuit Short To Battery | This DTC sets if voltage is sensed on the switch input circuit during the DSM self-test. If voltage 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. |
Visual Inspection and Diagnostic Pre-Checks
Make sure BCM fuse 19 (20A) is OK.