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MICU Input Test: MICU

  1. Turn the ignition switch to LOCK (0).
  2. Remove the driver's kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
  3. Disconnect driver's under-dash fuse/relay box connectors E, F, G, H, and P.
    NOTE: All connector views are wire side of female terminals.
    Fig 1: Driver's Under-Dash Fuse/Relay Box Connectors Terminal Identification
    G06968634Courtesy of AMERICAN HONDA MOTOR CO., INC.
  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 step 5.
  5. With the connectors still disconnected, 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.
      MICU INPUT TEST RESULT

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      H10 BLU Immobilizer-keyless control unit 7P connector disconnected Check for continuity between terminal H10 and immobilizer-keyless control unit 7P connector terminal No. 5:
      There should be continuity.      		 An open in the B-CAN wire
      H5 PNK Check for continuity between terminal H5 and immobilizer-keyless control unit 7P connector terminal No. 4:
      There should be continuity.      		 An open in the B-CAN wire
      H10 BLU Gauge control module 32P connector disconnected Check for continuity between terminal H10 and gauge control module 32P connector terminal No. 30:
      There should be continuity.      		 An open in the B-CAN wire
      H5 PNK Check for continuity between terminal H5 and gauge control module 32P connector terminal No. 29:
      There should be continuity.      		 An open in the B-CAN wire
      H10 BLU Power window master switch 37P connector disconnected Check for continuity between terminal H10 and power window master switch 37P connector terminal No. 30:
      There should be continuity.      		 An open in the B-CAN wire
      H5 PNK Check for continuity between terminal H5 and power window master switch 37P connector terminal No. 28:
      There should be continuity-      		 An open in the B-CAN wire
      H10 BLU Climate control unit or HVAC control unit connector A (28P) disconnected Check for continuity between terminal H10 and climate control unit or HVAC control unit connector A (28P) terminal No. 28:
      There should be continuity.      		 An open in the B-CAN wire
      H5 PNK Check for continuity between terminal H5 and climate control unit or HVAC control unit connector A (28P) terminal No. 26:
      There should be continuity.      		 An open in the B-CAN wire
      H10(1) BLU Audio-navigation unit connector D(14P) disconnected Check for continuity between terminal H10 and audio-navigation unit connector D (14P) terminal No. 16:
      There should be continuity.      		 An open in the B-CAN wire
      H5(1) PNK Check for continuity between terminal H5 and audio-navigation unit connector D (14P) terminal No. 5:
      There should be continuity.      		 An open in the B-CAN wire
      H10(2) BLU Audio unit connector D (14P) disconnected Check for continuity between terminal H10 and audio unit connector D (14P) terminal No. 13:
      There should be continuity.      		 An open in the B-CAN wire
      H5(2) PNK Check for continuity between terminal H5 and audio unit connector D (14P) terminal No. 3:
      There should be continuity-      		 An open in the B-CAN wire
      H10(1) BLU Navigation display unit 32P connector disconnected Check for continuity between terminal H10 and navigation display unit 32P connector terminal No. 29:
      There should be continuity.      		 An open in the B-CAN wire
      H5(1) PNK Check for continuity between terminal H5 and navigation display unit 32P terminal No. 28:
      There should be continuity.      		 An open in the B-CAN wire
      H10(3) BLU Audio display-USB adapter control unit A (32P) connector disconnected Check for continuity between terminal H10 and audio display-USB adapter control unit connector A (32P) terminal No. 29:
      There should be continuity.      		 An open in the B-CAN wire
      H5(3) PNK Check for continuity between terminal H5 and audio display-USB adapter control unit connector A (32P) terminal No. 28:
      There should be continuity.      		 An open in the B-CAN wire
      H10(4) BLU Seat heater control unit 14P connector disconnected Check for continuity between terminal H10 and seat heater control unit 14P connector terminal No. 10:
      There should be continuity.      		 An open in the B-CAN wire
      H5(4) PNK Check for continuity between terminal H5 and seat heater control unit 14P connector terminal No. 11:
      There should be continuity.      		 An open in the B-CAN wire
      H10(8) BLU Right power sliding door control unit connector B (16P) disconnected Check for continuity between terminal H10 and right power sliding door unit connector B (16P) terminal No. 14:
      There should be continuity.      		 An open in the B-CAN wire
      H5(8) PNK right power sliding door control unit connector B (16P) terminal No. 12:
      There should be continuity.      		 An open in the B-CAN wire
      H10 BLU Disconnect these connectors:
      • Immobilizer-keyless control unit 7P connector
      • Gauge control module 32P connector
      • Power window master switch 37P connector
      • Climate control unit or HVAC control unit connector A (28P)
      • Audio-navigation unit connector D (14P)(1)
      • Audio unit connector D (14P)(2)
      • Right power sliding door control unit connector B (16P)(8)
      • Navigation display unit 32P connector(1)
      • Audio display-USB adapter control unit connector A (32P)(3)
      • Seat heater control unit 14P connector(4)
      		 Check for continuity to ground:
      There should be continuity.
             		 A short to ground in the B-CAN wire
       
      H5 PNK
      G2(5) BLU Parking and back-up sensor control unit 24P connector disconnected Check for continuity between terminal G2 and parking and back-up sensor control unit 24P connector terminal No. 6:
      There should be continuity.      		 An open in the B-CAN wire
      G1(6) PNK Check for continuity between terminal G1 and parking and back-up sensor control unit 24P connector terminal No. 5:
      There should be continuity.      		 An open in the B-CAN wire
      G2(6) BLU Headlight leveling control unit 16P connector disconnected Check for continuity between terminal G2 and headlight leveling control unit 16P connector terminal No. 10:
      There should be continuity.      		 An open in the B-CAN wire
      G1(6) PNK Check for continuity between terminal G1 and headlight leveling control unit 16P connector terminal No. 9:
      There should be continuity.      		 An open in the B-CAN wire
      G2 BLU Disconnect these connectors:
      • Parking and back-up sensor control unit 24P connector(5)
      • Headlight leveling control unit 16P connector(6)
      		 Check for continuity to ground:
       
      There should be no continuity.      		 A short to ground in the B-CAN wire
       
      G1 PNK
      E32(7) BLU Power seat control unit connector B (40P) disconnected
             		 Check for continuity between terminal E32 and power seat control unit connector B (40P) terminal No. 22:
      There should be continuity.      		 An open in the B-CAN wire
      E31(7) PNK Check for continuity between terminal E31 and power seat control unit connector B (40P) terminal No. 21:
      There should be continuity.      		 An open in the B-CAN wire
      Check for continuity to ground:
      There should be no continuity.      		 A short to ground in the B-CAN wire
      E44(8) BLU Left power sliding door control unit connector B(16P) disconnected Check for continuity between terminal E44 and left power sliding door control unit connector B (16P) terminal No. 14:
      There should be continuity.      		 An open in the B-CAN wire
      E43(8) PNK Check for continuity between terminal E43 and left power sliding door control unit connector B (16P) terminal No. 12:
      There should be continuity.      		 An open in the B-CAN wire
      E44 BLU Rear fuse box connector B (38P) disconnected Check for continuity between terminal E44 and rear fuse box connector B (36P) terminal No. 17:
      There should be continuity.      		 An open in the B-CAN wire
      E43 PNK Check for continuity between terminal E43 and rear fuse box connector B (36P) terminal No. 10:
      There should be continuity.      		 An open in the B-CAN wire
      E44(9) BLU Power tailgate control unit connector C (14P) disconnected Check for continuity between terminal E44 and power tailgate control unit connector C (14P) terminal No. 2:
      There should be continuity.      		 An open in the B-CAN wire
      E43(9) PNK Check for continuity between terminal E43 and power tailgate control unit connector C (14P) terminal No. 1:
      There should be continuity.      		 An open in the B-CAN wire
      E44(10) BLU BSI control unit 16P connector disconnected Check for continuity between terminal E44 and BSI control unit 16P connector terminal No. 4:
      There should be continuity.      		 An open in the B-CAN wire
      E43(10) PNK Check for continuity between terminal E43 and BSI control unit 16P connector terminal No. 3:
      There should be continuity.      		 An open in the B-CAN wire
      G2 BLU Disconnect these connectors:
      • Left power sliding door control unit connector B (16P)(8)
      • Rear fuse box connector B (38P)
      • Power tailgate control unit connector C (14P)(9)
      • BSI control unit 16P connector(10)
      		 Check for continuity to ground:
       
      There should be no continuity.      		 A short to ground in the B-CAN wire
       
      E43 PNK
      G15 LT BLU Under all conditions Check for continuity between terminal G15 and data link connector 16P connector terminal No. 7:
      There should be continuity.      		 An open in the K-LINE wire
      Check for continuity to ground:
      There should be no continuity.      		 A short to ground in the K-LINE wire
      (1) With navigation
      (2) With 3 line type
      (3) With USB adapter
      (4) With seat heater
      (5) With parking and back-up sensor system
      (6) With HID
      (7) With DPMS
      (8) With power sliding door
      (9) With power tailgate
      (10) With BSI
  6. Reconnect the connectors to the driver's under-dash fuse/relay box, 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 7.
      NOTE: These are power tests for the multiplex integrated control unit.
      MICU INPUT TEST RESULT

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      E23 WHT Under all conditions Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. B16 (10 A) fuse in the under-hood fuse/relay box
      • Faulty driver's under-dash fuse/relay box
      • An open or high resistance in the wire
      F24 WHT Under all conditions Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. B16 (10 A) fuse in the under-hood fuse/relay box
      • An open or high resistance in the wire
      H7 GRN Ignition switch ON (II) Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. C11 (7.5 A) fuse in the driver's under-dash fuse/relay box
      • Faulty driver's under-dash fuse/relay box
      • An open or high resistance in the wire
      G7 GRN Under all conditions Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. B16 (7.5 A) fuse in the under-hood fuse/relay box
      • Faulty driver's under-dash fuse/relay box
      • An open or high resistance in the wire
      E34(1) GRN Ignition switch ON (II) Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. C11 (7.5 A) fuse in the driver's under-dash fuse/relay box
      • Faulty driver's under-dash fuse/relay box
      • An open or high resistance in the wire
      G14 RED Ignition switch ON (II) Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. C22 (15 A) fuse in the driver's under-dash fuse/relay box
      • Faulty driver's under-dash fuse/relay box
      • An open or high resistance in the wire
      H1 BRN 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
      P2 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
      G5 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
      (1) With DPMS
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