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Memory Seat Test 4A - Repairing Memory Seat Circuits (1 Of 2)

NOTE: Perform MEMORY SEAT TEST 1A  before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAM. Perform TEST VER-3A  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
  1. Using scan tool, select DOOR MODULES, then SENSORS. Observe memory switch voltages. If scan tool does not display about 4.5 NORM, go to step 7). If scan tool displays about 4.5 NORM, go to next step.
  2. Press and hold memory seat switch number 1 button and observe scan tool. If scan tool does not display about 3.6 MEM 1, go to step 7). If scan tool displays about 3.6 MEM 1, go to next step.
  3. Press and hold memory seat switch number 2 button and observe scan tool. If scan tool does not display about 2.4 MEM 2, go to step 7). If scan tool displays about 2.4 MEM 1, go to next step.
  4. Press and hold memory seat switch SET button and observe scan tool. If scan tool does not display 0.0 SHORT, go to step 7). If scan tool displays 0.0 SHORT, go to next step.
  5. Buckle driver's seat belt. Using scan tool, select BCM CHIME MONITORS. Read seat belt switch status. If scan tool does not display SEAT BELT SWITCH: OPEN, go to CHIME TEST 3A  . If scan tool displays SEAT BELT SWITCH: OPEN, go to next step.
  6. Unbuckle driver's seat belt. Using scan tool, read seat belt switch status. If scan tool does not display SEAT BELT SWITCH: CLOSED, perform CHIME TEST 6A  . If scan tool displays SEAT BELT SWITCH: CLOSED, go to next step.
  7. Using scan tool, select MEMORY SEAT MODULE, then SENSORS. If scan tool displays 0-5.06 volts on any sensor, go to MEMORY SEAT TEST 4B  . If scan tool does not display 0-5.06 volts on any sensor, go to next step.
    NOTE: In the following steps, actuator will cycle on and off. Allow actuation to continue for 3 actuations after seat stops moving. Perform actuator test outside vehicle.
  8. Using scan tool, select ACTUATORS. Actuate FRONT RISER UP RLY and then FRONT RISER DN RLY. If memory seats do not move when actuated, replace memory seat module. If memory seats move when actuated, go to next step.
  9. Using scan tool, select the following positions in order given: REAR RISER UP RLY and then REAR, HORIZ FWD RLY and then HORIZ BACK RLY, RECLINER FWD RLY and then RECLINER BACK RLY, LUMBAR FWD RLY and then LUMBAR BACK RLY, MISC., LEAN SEAT LIMITS. After selecting MISC., LEAN SEAT LIMITS, follow instructions on scan tool, and go to next step.
  10. Turn ignition off. Close all doors. Allow Body Control Module (BCM) to time out for about 40 seconds. After 40 seconds, turn ignition on. Using scan tool, erase all diagnostic trouble codes. Go to next step.
  11. Using power seat switch, move seat to FRONT, UP, HI and IN stops. Press memory seat SET button and then number 1 button. Move seat to REAR, DOWN, LOW and OUT stops. Press memory seat SET button and then number 2 button. Press number 1 button and allow seat to stop. After seat stops, press number 2 button. Go to next step.
  12. If memory seat did not move to number 1 and number 2 memory positions, go to next step. If memory seat moves to number 1 and number 2 memory positions, system is functioning okay. Erase all diagnostic trouble codes.
  13. Using scan tool, select MONITOR DISPLAY, then RISER MONITOR. Using front riser switch, move seat to up and down stops. If front riser position sensor voltage is not 0-.02 volts, go to MEMORY SEAT TEST 4B  . If front riser position sensor voltage is 0-.02 volts, go to next step.
  14. Using rear riser switch, move seat to up and down stops. If rear riser position sensor voltage is not 0-.02 volt, go to MEMORY SEAT TEST 4B  . If rear riser position sensor voltage is 0-.02 volt, go to next step.
  15. Using scan tool, select HORIZONTAL display. Using horizontal switch, move seat to front and rear stops. If horizontal position sensor voltage is not 0-.02 volt, go to MEMORY SEAT TEST 4B  . If horizontal position sensor voltage is 0-.02 volts, go to next step.
  16. Using scan tool, select RECLINER display. Using recliner switch, move seat to up and down stops. If recliner position sensor voltage is not 0-.02 volt, go to MEMORY SEAT TEST 4B  . If recliner position sensor voltage is 0-.02 volts, go to next step.
  17. Using scan tool, select LUMBAR display. Using lumbar switch, move seat to up and down stops. If lumbar position sensor voltage is not 0-.02 volt, go to MEMORY SEAT TEST 4B  . If lumbar position sensor voltage is 0-.02 volts, replace memory seat module.
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