Home ReviewsRefund
Home/Honda/Crosstour/Honda Crosstour I (2009-2012)/Repair manual/Memory Modules/Driving Position Memory System (Dpms): Diagnosis
Contents Wiring diagrams Section: Memory Modules All sections

Driving Position Memory System (Dpms): Diagnosis Honda Crosstour I

Memory Modules 14 illustrations ~7015 words

DTC U128D: Power Seat Control Unit Lost Communication With Gauge Control Module (VSP/NE Frame)

Note. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 7

Scheme 7: DTC U128D: Power Seat Control Unit Lost Communication With Gauge Control Module (VSP/NE Frame)
Scheme 7: DTC U128D: Power Seat Control Unit Lost Communication With Gauge Control Module (VSP/NE Frame)

Scheme 8

Scheme 8
Scheme 8

Scheme 9

Scheme 9
Scheme 9
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch to LOCK (0) and then back to ON (II).
  3. Wait for at least 6 seconds.
  4. Check for DTCs with the HDS. Is DTC U128D indicated? YES -Go to next step. NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power seat control unit and the gauge control module.
  5. From the BODY ELECTRICAL SYSTEM SELECT menu, select B-CAN CONTROL UNITS INFORMATION, and then select CHECK CONNECTED CONTROL UNITS. Is the gauge control module detected? YES -Go to 10 . NO -Go to next step.
  6. Measure the voltage between body ground and gauge control module 32P connector terminals No. 1 and No. 17 individually. Is there battery voltage? YES -Go to 9 . NO -Go to next step.
  7. Turn the ignition switch to LOCK (0).
  8. Check the No. A15 (10A) fuse in the under-hood fuse/relay box and the No. B5 (7.5 A) fuse in the drive's under-dash fuse/relay box. are the fuses OK? YES -Repair an open or high resistance in the No. A15 (10A)and/or No. B5 (7.5 A) fuse circuit. NO -Replace the fuse(s). If the fuse blows again, repair a short to ground on the No. A15 (10A) and/or No. B5 (7.5 A) fuse circuit.
  9. Measure the voltage between body ground and gauge control module 32P connector terminals No. 4 and No. 32 individually. Is there less than 0.2V? YES -Go to 11 . NO -Repair an open or high resistance in the ground wire(s) or poor ground (G401) and/or (G402).
  10. Turn the ignition switch to LOCK (0).
  11. Disconnect the gauge control module 32P connector.
  12. Disconnect power seat control unit connector B (40P).
  13. Check for continuity between power seat control unit connector B (40P) terminals No. 21 and No. 22 and Gauge control module 32P connector terminals No. 30 and No. 31 respectively. Is there continuity? YES -Replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(ref-360081-S32262066982010042600000) ). NO -Repair an open or poor connection in the B-CAN wire(s) between the gauge control module and the power seat control unit.

System Input Test and Function Test

  1. Connect the HDS to the data link connector.
  2. Turn the ignition switch to ON (II).
  3. From the BODY ELECTRICAL SYSTEM SELECT menu, select POWER SEAT/POWER MIRROR, then DTCs. If DTCs are found, troubleshoot the DTCs using B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-360108-S37049833192010042600000) ). If no DTCs are found, go to next step.
  4. Exit the DTC mode, and select DATA LIST from the POWER SEAT/POWER MIRROR TEST MODE MENU.
  5. Test each input and monitor each output under the condition shown below: If the data list indication is correct, continue to the next switch. If all switches are OK, go to next step. If the data list indication is not correct, do the appropriate test at the control unit and terminal indicated in the table. Voltage drop tests should be done with the ignition switch in ON (II) and all connectors connected and the meter negative test lead attached to a good body ground, unless specified otherwise. Continuity tests should be done with the ignition switch in LOCK (0) and indicated terminals disconnected. DATA LIST REFERENCE Data List Input/Command Condition: Data List Indication Control Unit/Terminal Number/Test (If applicable) Possible cause if desired result is not obtained Mirror Select Switch LEFT Mirror select switch in LEFT position: ON Select switch in CENTER or RIGHT position: OFF Power mirror control unit/11 (BRN) Mirror Select switch LEFT: 0 V; CENTER or RIGHT: 5 V Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Mirror Select Switch RIGHT Mirror select switch in RIGHT position: ON Select switch in CENTER or LEFT position: OFF Power mirror control unit 5 (RED) Mirror Select switch RIGHT: 0 V; CENTER or LEFT: 5 V Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Mirror Select Switch CENTER Mirror select switch in CENTER position: ON Select switch in RIGHT or LEFT position: OFF Power mirror control unit/5 (RED), 11 (BRN) Mirror Select switch CENTER: 5 V each RIGHT or [LEFT] : 11 (5 V) [11 (0 V)] Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Mirror LEFT Switch Mirror select switch in LEFT, then RIGHT Mirror left switch pressed: ON Mirror switch released: OFF Power mirror control unit/3(GRY), 12(PUR),4(WHT), 11 (BRN), 5 (RED) Mirror Select switch LEFT, left switch pressed: 3 (12 V), 12 (12 V), 4 (5 V), 11 (0 V), 5 (5 V) Mirror Select switch RIGHT, left switch pressed: 3 (12 V), 12 (5 V), 4 (12 V), 11 (5 V), 5 (0 V) Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Mirror RIGHT Switch Mirror select switch in LEFT, then RIGHT Mirror right switch pressed: ON Mirror switch released: OFF Power mirror control unit/3(GRY), 12 (PUR), 4 (WHT), 11 (BRN), 5 (RED) Mirror Select switch LEFT, right switch pressed: 3 (0 V), 12 (0 V), 4(5V), 11 (12V),5(5V) Mirror Select switch RIGHT, right switch pressed: 3 (0 V), 12 (5 V), 4 (0 V), 11 (5 V), 5 (12 V) Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Mirror UP Switch Mirror select switch in LEFT, then RIGHT Mirror up switch pressed: ON Mirror switch released: OFF Power mirror control unit/3 (GRY), 12 (PUR), 4 (WHT), 11 (BRN), 5 (RED) Mirror Select switch LEFT, up switch pressed: 3 (12 V), 12 (0 V), 4 (5 V), 11 (0V), 5 (5 V) Mirror Select switch RIGHT, up switch pressed: 3 (12 V), 12 (5 V), 4 (0 V), 11 (5 V), 5 (12 V) Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Mirror DOWN Switch Mirror select switch in LEFT, then RIGHT Mirror down switch pressed: ON Mirror switch released: OFF Power mirror control unit/3 (GRY), 12 (PUR), 4 (WHT), 11 (BRN), 5 (RED) Mirror Select switch LEFT, down switch pressed: 3 (0 V), 12 (12 V), 4 (5 V), 11 (12 V), 5 (5 V) Mirror Select switch RIGHT, down switch pressed: 3 (0 V), 12 (5 V), 4 (12 V), 11 (5 V), 5 (12 V) Faulty power mirror switch (see «POWER MIRROR SWITCH TEST/REPLACEMENT»(ref-360141-S02033315472010042600000) ) Faulty power mirror control unit An open or high resistance in the wire A short to ground in the wire Slide Switch Forward Slide switch forward: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B14 (BLU) Slide switch forward: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Slide Switch Backward Slide switch backward: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B37 (BRN) Slide switch backward: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Recline Switch Forward Recline switch forward: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B15 (GRY) Recline switch forward: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Recline Switch Backward Recline switch backward: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B38 (RED) Recline switch backward: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Front Up-Down Switch Up Front up-down switch up: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B16 (LT GRN) Front up-down switch up: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Front Up-Down Switch Down Front up-down switch down: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B17 (WHT) Front up-down switch down: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Rear Up-Down Switch Up Rear up-down switch up: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B39 (BLU) Rear up-down switch up: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Rear Up-Down Switch Down Rear up-down switch down: ON Switch released: OFF Power seat control unit/B20 (LT BLU), B18 (ORN) Rear up-down switch down: 0 V Switch released: 5 V Faulty driver's power seat adjustment switch (see «POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT»(ref-360134-S42703058882010042600000) ) Faulty power seat control unit An open or high resistance in the wire A short to ground in the wire Ignition Switch for Power Seat Control Ignition switch ON (II): ON Ignition switch OFF: OFF Power seat control unit/B27 (BLK/YEL) Ignition switch ON (II): 12 V Blown No. B2 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty power seat control unit An open or high resistance in the wire ATP Switch Transmission range switch P position: ON Any other position than P: OFF Power seat control unit/B35 (BLK/BLU) Transmission range switch P: 0 V Faulty transmission range switch Faulty power seat control unit An open or high resistance in the wire Slide Sensor Seat moving forward or backward: ON Seat not moving: OFF Power seat control unit/B10 (BRN) Pulses as seat moves: 2.5 V average Faulty slide position sensor Faulty power seat control unit An open or high resistance in the wire Front Up-Down Sensor Seat front moving up/down: ON Seat not moving: OFF Power seat control unit/B9 (PNK) Pulses as seat moves: 2.5 V average Faulty front up-down position sensor Faulty power seat control unit An open or high resistance in the wire Recline Sensor Seat back moving forward or backward: ON Seat not moving: OFF Power seat control unit/B11 (GRN) Pulses as seat moves: 2.5 V average Faulty recline position sensor Faulty power seat control unit An open or high resistance in the wire Rear Up-Down Sensor Seat rear moving up/down: ON Seat not moving: OFF Power seat control unit/B8 (YEL) Pulses as seat moves: 2.5 V average Faulty rear up-down sensor Faulty power seat control unit An open or high resistance in the wire Left Power Mirror Horizontal Sensor Left mirror moves left/right: NORMAL Left mirror stopped: ABNORMAL Power mirror control unit/6 (YEL), 9 (GRN) Left mirror moving from full left to full right: 6 (about 0.5 V to 4.5 V), 9 (at least 5 V) Faulty mirror position sensor Faulty power mirror control unit An open or high resistance in the wire Left Power Mirror Vertical Sensor Left mirror moves up/down: NORMAL Left mirror stopped: ABNORMAL Power mirror control unit/6 (YEL), 8 (LT GRN) Left mirror moving from full down to full up: 6 (about 0.5 V to 4.5 V), 8 (at least 5 V) Faulty mirror position sensor Faulty power mirror control unit An open or high resistance in the wire Right Power Mirror Horizontal Sensor Right mirror moves left/right: NORMAL Right mirror stopped: ABNORMAL Power mirror control unit/6 (YEL), 17 (PUR) Right mirror moving from full left to full right: 6 (about 0.5 V to 4.5 V), 17 (at least 5 V) Faulty mirror position sensor Faulty power mirror control unit An open or high resistance in the wire Right Power Mirror Vertical Sensor Right mirror moves up/down: NORMAL Right mirror stopped: ABNORMAL Power mirror control unit/6 (YEL), 18 (ORN) Right mirror moving from full down to full up: 6 (about 0.5 V to 4.5 V), 18 (at least 5 V) Faulty mirror position sensor Faulty power mirror control unit An open or high resistance in the wire DPMS SET Switch Driving position memory switch SET button pushed: ON Switch released: OFF Door multiplex control unit/20 (YEL) Driving position memory switch SET button pushed: 20 (about less than 1 V) SET button released: 20 (at least 5 V) Faulty driving position memory switch Faulty door multiplex control unit An open or high resistance in the wire A short to ground in the wire DPMS POSITION 1 Switch Driving position memory switch POSITION 1 button pushed: ON Switch released: OFF Door multiplex control unit/22 (GRY) Driving position memory switch POSITION 1 button pushed: 22 (about more than 1 V) POSITION 1 button released: 22 (at least 5 V) Faulty driving position memory switch Faulty door multiplex control unit An open or high resistance in the wire A short to ground in the wire DPMS POSITION 2 Switch Driving position memory switch POSITION 2 button pushed: ON Switch released: OFF Door multiplex control unit/23 (RED) Driving position memory switch POSITION 2 button pushed: 23 (about more than 1 V) POSITION 2 button released: 23 (at least 5 V) Faulty driving position memory switch Faulty door multiplex control unit An open or high resistance in the wire A short to ground in the wire
  6. Exit the DATA LIST and select FUNCTION TEST.
  7. Do each of the function tests listed in the table shown. The appropriate output should occur. If the function operates normally, go to the next function test. If all function tests operate normally, the system is OK. If the function does not occur, do the appropriate test at the control unit and terminal indicated in the table. Voltage drop tests should be done with the ignition switch in ON (II) and all connectors connected. Continuity tests should be done with the ignition switch in LOCK (0) and indicated terminals disconnected. Jumper tests should be done according to the instructions indicated. If the test indicates that the component operates normally, but the function will not operate by doing the function test or. the normal use of the component, the control unit that operates that function must be faulty; replace it. If the test indicates that the component does not operate normally, check for an open or short in the harnesses between the component and the control unit. If the harness is OK, replace the component. COMPONENT AND OPERATION REFERENCE Function Test Component and Operation Control Unit/Terminal Number/Test (If applicable) Possible cause if desired result is not obtained Power Seat: Slide Motor-Full Forward Seat slides forward Power seat control unit/A1 (LT BLU), B12 (BLK), A2 (WHT), A10 (YEL) Disconnect power seat control unit connectors A and B. Connect A1 to A10 and A2 to B12; driver's seat should slide forward. Faulty slide motor An open or high resistance in the wire A short to ground in the wire Power Seat: Slide Motor-Full Backward Seat slides backward Power seat control unit/A1 (LT BLU), B12 (BLK), A2 (WHT), A10 (YEL) Disconnect power seat control unit connectors A and B. Connect A1 to A2 and A10 to B12; driver's seat should slide backward. Faulty slide motor An open or high resistance in the wire A short to ground in the wire Power Seat: Front Up-Down Motor-Full Up Front of seat moves up Power seat control unit/A1 (LT BLU), B12 (BLK), A3 (YEL), A11 (ORN) Disconnect power seat control unit connectors A and B. Connect A1 to A11 and A3 to B12; front of driver's seat should move up. Faulty front up-down motor An open or high resistance in the wire A short to ground in the wire Power Seat: Front Up-Down Motor-Full Down Front of seat moves down Power seat control unit/A1 (LT BLU), B12 (BLK), A3 (YEL), A11 (ORN) Disconnect power seat control unit connectors A and B. Connect A1 to A3 and A11 to B12; front of driver's seat should move down. Faulty front up-down motor An open or high resistance in the wire A short to ground in the wire Power Seat: Rear Up-Down Motor-Full Up Rear of seat moves up Power seat control unit/A1 (LT BLU), B12 (BLK), A7 (GRN), A17 (WHT) Disconnect power seat control unit connectors A and B. Connect A1 to A7 and A17 to B12; rear of driver's seat should move up. Faulty rear up-down motor An open or high resistance in the wire A short to ground in the wire Power Seat: Rear Up-Down Motor-Full Down Rear of seat moves down Power seat control unit/A1 (LT BLU), B12 (BLK), A7 (GRN), A17 (WHT) Disconnect power seat control unit connectors A and B. Connect A1 to A17 and A7 to B12; rear of driver's seat should move down. Faulty rear up-down motor An open or high resistance in the wire A short to ground in the wire Power Seat: Recline Motor-Full Forward Seat back moves forward Power seat control unit/A1 (LT BLU), B12 (BLK), A16 (RED), A18 (GRY) Disconnect power seat control unit connectors A and B. Connect A1 to A18 and A16 to B12; driver's seat back should move forward. Faulty recline motor An open or high resistance in the wire A short to ground in the wire Power Seat: Recline Motor-Full Backward Seat back moves backward Power seat control unit/A1 (LT BLU), B12 (BLK), A16 (RED), A18 (GRY) Disconnect power seat control unit connectors A and B. Connect A1 to A16 and A18 to B12; driver's seat back should move backward. Faulty recline motor An open or high resistance in the wire A short to ground in the wire

Power Seat Control Unit Input Test/Replacement

Note. SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 10

Scheme 10: Power Seat Control Unit Input Test/Replacement
Scheme 10: Power Seat Control Unit Input Test/Replacement
  1. Turn the ignition switch to LOCK (0).
  2. Remove the driver's seat (see «FRONT SEAT REMOVAL/INSTALLATION»(ref-360101-S33805544852010042600000) ). NOTE: Be careful not to scratch the interior trim.
  3. Disconnect the 18P connector (A) and 40P connector (B) from the power seat control unit (C).
  4. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary and recheck the system. If the terminals look OK, go to next step.
  5. Reconnect the connectors to the power seat control unit, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 6. CONNECTOR INPUT TESTS REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained B27 BLK/YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. B2 (7.5 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire B25 BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. A15 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire A8 PNK Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. A3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box Blown No. B21 (20 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire A1 LT BLU Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. A3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box Blown No. B19 (20 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire B12 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G801) An open or high resistance in the ground wire A5 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G801) An open or high resistance in the ground wire A9 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G801) An open or high resistance in the ground wire B35 BLK/BLU Shift lever in P position Measure the voltage to ground: There should be less than 0.2 V. Faulty transmission range switch Poor ground (G101) or an open in the ground wire An open or high resistance in the wire Shift lever in any other position than P Measure the voltage to ground: There should be about 5 V. Faulty transmission range switch A short to ground in the wire B6 PUR Run the power seat motors Measure the voltage to ground: There should be at least about 10 V. Faulty position sensor A short to ground in the wire B11 . B32 GRN . WHT Run the recline motor Measure the voltage between terminals B11 (+) and B32(-): There should be about 2.5 V average. Faulty position sensor An open or high resistance in the wire A short to ground in the wire B10 . B32 BRN . WHT Run the slide motor Measure the voltage between terminals B10 (+) and B32(-): There should be about 2.5 V average. Faulty position sensor An open or high resistance in the wire A short to ground in the wire B9 . B32 PNK . WHT Run the front up-down motor Measure the voltage between terminals B9 (+) and B32 (-): There should be about 2.5 V average. Faulty position sensor An open or high resistance in the wire A short to ground in the wire B8 . B32 YEL . WHT Run the rear up-down motor Measure the voltage between terminals B8 (+) and B32 (-): There should be about 2.5 V average. Faulty position sensor An open or high resistance in the wire A short to ground in the wire B20 . B14 LT BLU . BLU Slide switch in FORWARD position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B37 LT BLU . BRN Slide switch in BACKWARD position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B15 LT BLU . GRY Recline switch in FORWARD position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B38 LT BLU . RED Recline switch in BACKWARD position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B16 LT BLU . LT GRN Front up-down switch in UP position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B17 LT BLU . WHT Front up-down switch in DOWN position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B39 LT BLU . BLU Rear up-down switch in UP position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire B20 . B18 LT BLU . ORN Rear up-down switch in DOWN position Measure the voltage between the terminals: There should be less then 0.2 V. Faulty driver's power seat adjustment switch An open or high resistance in the wire
  6. Turn the ignition switch to LOCK (0), then disconnect the connectors from the power seat control unit, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit must be faulty; replace it. CONNECTOR INPUT TESTS REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained B22 BLU Under all conditions (disconnect the door multiplex control unit 37P connector) Check for continuity between terminal B22 and door multiplex control unit 37P connector terminal No. 30: There should be continuity. An open in the B-CAN wire Under all conditions (disconnect the immobilizer-keyless control unit 7P connector) Check for continuity between terminal B22 and immobilizer-keyless control unit 7P connector terminal No. 5: There should be continuity. An open in the B-CAN wire B21 PNK Under all conditions (disconnect the door multiplex control unit 37P connector) Check for continuity between terminal B21 and door multiplex control unit 37P connector terminal No. 28: There should be continuity. An open in the B-CAN wire Under all conditions (disconnect the immobilizer-keyless control unit 7P connector) Check for continuity between terminal B21 and immobilizer-keyless control unit 7P connector terminal No. 4: There should be continuity. An open in the B-CAN wire B23 BLK Disconnect the power mirror control unit 24P connector Check for continuity between terminal B23 and power mirror control unit 24P connector terminal No. 24: There should be continuity. An open in the UART wire A2 . A10 WHT . YEL Under all conditions Connect terminals A8 and A2, and terminals A10 and A5: The seat should slide backward. Faulty slide motor An open or high resistance in the wire Connect terminals A8 and A10, and terminals A2 and A5: The seat should slide forward. A18 . A16 GRY . RED Under all conditions Connect terminals A8 and A18, and terminals A16 and A5: The seat should recline forward. Faulty recline motor An open or high resistance in the wire Connect terminals A8 and A16, and terminals A18 and A5: The seat should recline backward. A3 . A11 YEL . ORN Under all conditions Connect terminals A8 and A3, and terminals A11 and A5: The front of seat should move down. Faulty front up-down motor An open or high resistance in the wire Connect terminals A8 and A11, and terminals A3 and A5: The front of seat should move up. A7 . A17 GRN . WHT Under all conditions Connect terminals A8 and A7, and terminals A17 and A5: The rear of seat should move up. Faulty rear up-down motor An open or high resistance in the wire Connect terminals A8 and A17, and terminals A7 and A5: The rear of seat should move down.

Power Mirror Control Unit Input Test/Replacement

Note. Before troubleshooting the DPMS, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 11

Scheme 11: Power Mirror Control Unit Input Test/Replacement
Scheme 11: Power Mirror Control Unit Input Test/Replacement
  1. Turn the ignition switch to LOCK (0).
  2. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-360114-S16109316092010042600000) ).
  3. Disconnect the 24P connector (A) from the power mirror control unit (B).
  4. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to next step.
  5. Reconnect the connector to the power mirror control unit, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to next step. CONNECTOR INPUT TESTS REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 2 LT GRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire 13 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. A15 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire 15 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G401) An open or high resistance in the ground wire 12 . 11 PUR . BRN Ignition switch ON (II), and mirror select switch in LEFT, then mirror down switch pressed Measure the voltage to ground: There should be battery voltage. Blown No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty power mirror switch An open or high resistance in the wire 5 . 4 RED . WHT Ignition switch ON (II), and mirror select switch in RIGHT, then mirror down switch pressed Measure the voltage to ground: There should be battery voltage. Blown No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty power mirror switch An open or high resistance in the wire 3 GRY Ignition switch ON (II), and mirror select switch in LEFT or RIGHT, then mirror up switch pressed Measure the voltage to ground: There should be battery voltage. Blown No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty power mirror switch An open or high resistance in the wire 6 YEL Move left or right mirrors Measure the voltage to ground: There should be about 5 V. Faulty mirror position sensor A short to ground in the wire 9 . 7 GRN . BRN Swing the left mirror from full left to full right Measure the voltage between terminals No. 9 and No. 7: There should be about 0.5 V to 4.5 V (average about 2.5 V when the mirror moves). Faulty left mirror position sensor An open or high resistance in the wire A short to ground in the wire 8 . 7 LT GRN . BRN Move the left mirror from full up to full down Measure the voltage between terminals No. 8 and No. 7: There should be about 0.5 V to 4.5 V (average about 2.5 V when the mirror moves). Faulty left mirror position sensor An open or high resistance in the wire A short to ground in the wire 17 . 7 PUR . BRN Swing the right mirror from full left to full right Measure the voltage between terminals No. 17 and No. 7: There should be about 0.5 V to 4.5 V (average about 2.5 V when the mirror moves). Faulty right mirror position sensor An open or high resistance in the wire A short to ground in the wire 18 . 7 ORN . BRN Move the right mirror from full up to full down Measure the voltage between terminals No. 18 and No. 7: There should be about 0.5 V to 4.5 V (average about 2.5 V when the mirror moves). Faulty right mirror position sensor An open or high resistance in the wire A short to ground in the wire
  6. Turn the ignition switch to LOCK (0), then disconnect the connectors from the power mirror control unit, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit must be faulty; replace it. CONNECTOR INPUT TESTS REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 24 LT GRN Disconnect power seat control unit B (40P) connector Check for continuity between terminal No. 24 (LT GRN) and power seat control unit B (40P) connector terminal No. 23 (BLK): There should be continuity. An open in the UART wire 23 . 22 PUR . ORN Under all conditions Connect terminals No. 23 and No. 13, and terminals No. 22 and No. 15: The left mirror should move up. Faulty left mirror actuator An open or high resistance in the wire Connect terminals No. 22 and No. 13, and terminals No. 23 and No. 15: The left mirror should move down. 21 . 22 LT BLU . ORN Under all conditions Connect terminals No. 22 and No. 13, and terminals No. 21 and No. 15: The left mirror should swing left. Faulty left mirror actuator An open or high resistance in the wire Connect terminals No. 21 and No. 13, and terminals No. 22 and No. 15: The left mirror should swing right. 10 . 20 YEL . RED Under all conditions Connect terminals No. 10 and No. 13, and terminals No. 20 and No. 15: The right mirror should move up. Faulty right mirror actuator An open or high resistance in the wire Connect terminals No. 20 and No. 13, and terminals No. 10 and No. 15: The right mirror should move down. 19 . 20 WHT . RED Under all conditions Connect terminals No. 20 and No. 13, and terminals No. 19 and No. 15: The right mirror should swing left. Faulty right mirror actuator An open or high resistance in the wire Connect terminals No. 19 and No. 13, and terminals No. 20 and No. 15: The right mirror should swing right.

Door Multiplex Control Unit Input Test

Note. Before troubleshooting the DPMS, troubleshooting the multiplex integrated control system first using B-CAN System DiagosisTest Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Scheme 12

Scheme 12: Door Multiplex Control Unit Input Test
Scheme 12: Door Multiplex Control Unit Input Test
  1. Turn the ignition switch to LOCK (0).
  2. Open and close the driver's door, then remove the power window master switch (see «POWER WINDOW MASTER SWITCH REPLACEMENT»(ref-360115-S00779746282010042600000) ).
  3. Disconnect the 37P connector (A) from the power window master switch (B).
  4. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to next step.
  5. Reconnect the connector to the power window master switch, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to next step. CONNECTOR INPUT TESTS REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 26 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. A15 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire 25 LT GRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire 4 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. A3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box Blown No. B24 (20 A) fuse in the driver's under-dash fuse/relay box An open or high resistance in the wire 31 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G401) An open or high resistance in the ground wire 3 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G402) An open or high resistance in the ground wire 23 RED Ignition switch ON (II), position 2 switch pressed Measure the voltage to ground: There should be less than 0.2 V. Faulty driving position memory switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire Ignition switch ON (II), position 2 switch released Measure the voltage to ground: There should be about 5 V. Faulty driving position memory switch A short to ground in the wire 22 GRY Ignition switch ON (II), position 1 switch pressed Measure the voltage to ground: There should be less than 0.2 V. Faulty driving position memory switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire Ignition switch ON (II), position 1 switch released Measure the voltage to ground: There should be about 5 V. Faulty driving position memory switch A short to ground in the wire 20 YEL Ignition switch ON (II), SET switch pressed Measure the voltage to ground: There should be less than 0.2 V. Faulty driving position memory switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire Ignition switch ON (II), SET switch released Measure the voltage to ground: There should be about 5 V. Faulty driving position memory switch A short to ground in the wire
  6. Turn the ignition switch to LOCK (0), then disconnect the connector from the power window master switch, and do the following input tests: If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the door multiplex control unit must be faulty; replace the power window master switch. NOTE: After replacing the power window master switch, reset the power window control unit (see «RESETTING THE POWER WINDOW CONTROL UNIT»(ref-360115-S36729123722010042600000) ). CONNECTOR INPUT TESTS REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 12 GRN Under all conditions Connect terminals No. 26 and No. 12: The driving position memory switch indicator 2 should come on. Faulty LED Faulty driving position memory switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire 10 PUR Under all conditions Connect terminals No. 26 and No. 10: The driving position memory switch indicator 1 should come on. Faulty LED Faulty driving position memory switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire 37 PNK Under all conditions Connect terminals No. 26 and No. 37: The driving position memory switch lights should come on. Faulty LED Faulty driving position memory switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire 30 BLU Under all conditions (disconnect the power seat control unit connector B (40P)) Check for continuity between terminal No. 30 and power seat control unit connector B (40P) terminal No. 21: There should be continuity. An open in the B-CAN wire 28 PNK Under all conditions (disconnect the power seat control unit connector B (40P)) Check for continuity between terminal No. 28 and power seat control unit connector B (40P) terminal No. 22: There should be continuity. An open in the B-CAN wire 36 BLU Disconnect the front passenger's power window switch 37P and the moonroof control unit/motor 14P connectors Check for continuity between terminal No. 36 and the front passenger's power window switch 37P connector terminal No. 34; There should be continuity. Check for continuity to ground: There should be no continuity. An open in UART wire A short in the UART wire

Scheme 13

Scheme 13: Driving Position Memory Switch Test/Replacement
Scheme 13: Driving Position Memory Switch Test/Replacement

Scheme 14

Scheme 14
Scheme 14
  1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-360114-S16109316092010042600000) ).
  2. Disconnect the 7P connector (A) from the driver's position memory switch (B).
  3. Remove the four screws, then remove the switch from the door panel.
  4. Check for continuity between the terminals in each switch position according to the table. NOTE: Make sure the correct test lead (+ or -) is placed on the terminal. When checking for continuity across the diode, use the diode setting (-->(symbol)) on the digital volt/ohm meter to check the diode bias. Note this important operating characteristic: diode to fully conduct electricity in one direction (forward), while not at all in the opposite direction (reverse).
  5. If the continuity is not as specified, replace the switch.
  6. Install the switch in the reverse order of removal.

Driver's Power Seat Motor Test

Note. SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.

Scheme 15

Scheme 15: Driver's Power Seat Motor Test
Scheme 15: Driver's Power Seat Motor Test

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

Scheme 18

Scheme 18
Scheme 18

Scheme 19

Scheme 19
Scheme 19

Scheme 20

Scheme 20
Scheme 20
  1. Remove the driver's seat (see «FRONT SEAT REMOVAL/INSTALLATION»(ref-360101-S33805544852010042600000) ).
  2. Disconnect the 6P or 5P connector from each power seat motor. NOTE: For the recline motor, remove the seat-back cover (see «REAR SEAT-BACK COVER REPLACEMENT»(ref-360101-S10750283452010042600000) ).
  3. Test each motor by connecting power and ground according to the table. When the motor stops running, disconnect battery power immediately.
  4. If the motor does not run or fails to run smoothly, replace: Slide motor (see «FRONT SEAT SLIDE MOTOR REPLACEMENT»(ref-360101-S01871276412010042600000) ) Front up-down motor/seat frame (see «FRONT SEAT FRAME REPLACEMENT»(ref-360101-S09441611592010042600000) ) Rear up-down motor/seat frame (see «FRONT SEAT FRAME REPLACEMENT»(ref-360101-S09441611592010042600000) ) Recline motor (see «FRONT SEAT RECLINE MOTOR REPLACEMENT»(ref-360101-S34982436662010042600000) ) NOTE: The front and rear up-down motors are part of the seat frame.

More articles — Driving Position Memory System (Dpms)