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Home >> Acura >> 2006 >> MDX Base >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Driving Position Memory Systems (DPMS) >> Driver's Power Seat Control Unit Input Test
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Driver's Power Seat Control Unit Input Test

  1. Remove the driver's power seat mounting bolts (see FRONT SEAT REMOVAL/INSTALLATION ).
    NOTE: Be careful not to scratch the interior trim.
  2. Disconnect the connectors from the driver's power seat control unit (A).
    NOTE: Turning the ignition switch ON (II) when the power seat connectors are disconnected may set SRS codes.
    Fig 1: Disconnecting Driver's Power Seat Control Connector Unit
    G03642425Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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 step 4.
  4. With the power seat control unit connectors still disconnected, make these input tests at the connector.
    • 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 5.
      DRIVER'S POWER SEAT CONTROL UNIT INPUT TEST (1 OF 2)

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A20
      B7
      D1      		 BLK Under all conditions Check for continuity to ground:
      There should be continuity.
      • Poor ground (G631)
      • An open in the wire
      A9 BLK/YEL Ignition switch ON (II) Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 9 (10 A) fuse in the driver's under-dash fuse/relay box
      • An open in the wire
      A10 WHT/YEL Under all conditions Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 54 (40 A) fuse in the under-hood fuse/relay box
      • Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box
      • An open in the wire
      B3 BLU Under all conditions Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 55 (40 A) fuse in the under-hood fuse/relay box
      • Blown No. 4 (20 A) fuse in the passenger's under-dash fuse/relay box
      • An open in the wire
      D4 RED Under all conditions Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 55 (40 A) fuse in the under-hood fuse/relay box
      • Blown No. 2 (20 A) fuse in the passenger's under-dash fuse/relay box
      • An open in the wire
      B2 RED/GRN Under all conditions Attach to ground:
      The driving position memory switch indicator 1 should come on.
      • Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box
      • Faulty LED
      • Faulty driving position memory switch
      • An open in the wire
      B6 RED Under all conditions Attach to ground:
      The driving position memory switch indicator 2 should come on.
      A3 BLU/WHT Under all conditions Check for continuity between the A3 terminal and PCM 56P connector B terminal No. 26 (disconnected)(1) :
      There should be continuity.      		 An open in the wire
      Check for continuity between the A3 terminal and body ground:
      There should be no continuity.      		 Short in the wire
      A19 BLU/YEL Push the position button 2 Check for continuity to ground:
      There should be continuity.
      There should be no continuity with the button released.
      • Faulty driving position memory switch
      • Poor ground (G401)
      • An open in the wire
      A8 BLU/GRN Push the position button 1 Check for continuity to ground:
      There should be continuity.
      There should be no continuity with the button released.
      • Faulty driving position memory switch
      • Poor ground (G401)
      • An open in the wire
      C10 YEL/WHT Push the MEMO button Check for continuity to ground:
      There should be continuity.
      There should be no continuity with the button released.
      • Faulty driving position memory switch
      • Poor ground (G401)
      • An open in the wire
      (1) For the PCM connector terminal locations (see PCM INPUTS AND OUTPUTS AT CONNECTOR A ).
  5. Reconnect the connectors to the driver's power seat control unit, turn the ignition switch ON (II) to keep the system awake, and make these input tests at the connectors.
    • 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. Substitute with a known-good control unit and recheck.
      NOTE: All connector views are from wire side of female terminals.
      Fig 2: Identifying Driver's Power Seat Control Connectors Unit
      G03642426Courtesy of AMERICAN HONDA MOTOR CO., INC.
      DRIVER'S POWER SEAT CONTROL UNIT INPUT TEST (2 OF 2)

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A18 GRN/ORN Driver's door open Check for voltage to ground:
      There should be less than 1 V.
      • Faulty driver's door switch
      • An open in the wire
      Driver's door closed Check for voltage to ground:
      There should be 5 V or more.
      • Faulty driver's door switch
      • A short in the wire
      A2 BLU/BLK With slide motor running Check for voltage to ground:
      There should be 0 V to about 5 V alternately.
      • Faulty slide position sensor
      • An open in the wire
      • A short to ground
      A12 GRN/BLK With front up-down motor running Check for voltage to ground:
      There should be 0 V to about 5 V alternately.
      • Faulty front up-down position sensor
      • An open in the wire
      • A short to ground
      C5 YEL/BLK With recline motor running Check for voltage to ground:
      There should be 0 V to about 5 V alternately.
      • Faulty recline position sensor
      • An open in the wire
      • A short to ground
      C11 RED/BLK With rear up-down motor running Check for voltage to ground:
      There should be 0 V to about 5 V alternately.
      • Faulty rear up-down position sensor
      • An open in the wire
      • A short to ground
      A7 BLK/BLU Ignition switch ON (II), shift lever in P position Check for voltage to ground:
      There should be less than 1 V.
      • Poor ground (G101, G102)
      • Faulty transmission range switch
      • An open in the wire
      A17 WHT Ignition switch ON (II), shift lever in R position Check for voltage to ground:
      There should be less than 1 V.
      • Poor ground (G101, G102)
      • Faulty transmission range switch
      • An open in the wire
      A5
      A6      		 RED/BLK
      YEL/BLK      		 Slide switch in FORWARD position Check for voltage between the A5 and A6 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Slide switch is in the neutral position. Check for voltage between the A5 and A6 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      A16      		 RED/BLK
      YEL/RED      		 Slide switch in BACKWARD position Check for voltage between the A5 and A16 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Slide switch is in the neutral position. Check for voltage between the A5 and A16 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      C1      		 RED/BLK
      RED/WHT      		 Recline switch in FORWARD position Check for voltage between the A5 and C1 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Recline switch is in the neutral position. Check for voltage between the A5 and C1 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      C7      		 RED/BLK
      RED/YEL      		 Recline switch in BACKWARD position Check for voltage between the A5 and C7 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Recline switch is in the neutral position. Check for voltage between the A5 and C7 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      C8      		 RED/BLK
      GRN/BLK      		 Front up-down switch in DOWN position Check for voltage between the A5 and C8 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Front up-down switch is in the neutral position. Check for voltage between the A5 and C8 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      C2      		 RED/BLK
      GRN/WHT      		 Front up-down switch in UP position Check for voltage between the A5 and C2 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Front up-down switch is in the neutral position. Check for voltage between the A5 and C2 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      C3      		 RED/BLK
      BLU/ORN      		 Rear up-down switch in UP position Check for voltage between the A5 and C3 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Rear up-down switch is in the neutral position. Check for voltage between the A5 and C3 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      A5
      C9      		 RED/BLK
      BLU/RED      		 Rear up-down switch in DOWN position Check for voltage between the A5 and C9 terminals:
      There should be less than 1 V.
      • Faulty adjustment switch
      • An open in the wire
      Rear up-down switch is in the neutral position. Check for voltage between the A5 and C9 terminals:
      There should be more than 5 V.      		 Faulty adjustment switch
      B1
      B5      		 BLU
      BLU/YEL      		 Jump B3 terminal to B1 terminal, and B5 terminal to B7 terminal.
      Reverse the connections to operate the motor in the other direction.      		 Check slide motor operation:
      The motor should run.
      • Faulty slide motor
      • An open in the wire
      B4
      B8      		 RED/YEL
      YEL/GRN      		 Jump B3 terminal to B4 terminal, and B8 terminal to B7 terminal.
      Reverse the connections to operate the motor in the other direction.      		 Check front up-down motor operation:
      The motor should run.
      • Faulty front up-down motor
      • An open in the wire
      D2
      D5      		 GRN/YEL
      GRN      		 Jump B3 terminal to D2 terminal, and D5 terminal to B7 terminal.
      Reverse the connections to operate the motor in the other direction.      		 Check rear up-down motor operation:
      The motor should run.
      • Faulty rear up-down motor
      • An open in the wire
      D3
      D6      		 YEL/GRN
      YEL      		 Jump B3 terminal to D3 terminal, and D6 terminal to B7 terminal.
      Reverse the connections to operate the motor in the other direction.      		 Check recline motor operation:
      The motor should run.
      • Faulty recline motor
      • An open in the wire
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