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Driver's MICU

WARNING: This page is about a different variant/trim than selected.
  1. Turn the ignition switch to LOCK(O).
  2. Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
  3. Disconnect driver's under-dash fuse/relay box connectors F, N, P, Q, and R.
    NOTE: All connector views are wire side of female terminals.
    Fig 1: Views Are Wire Side Of Female Terminals
    G00521852Courtesy 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.
    TEST CONDITION REFERENCE CHART

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    P5 BLU Immobilizer-keyless control unit 7P connector disconnected Check for continuity between terminal P5 and immobilizer-keyless control unit 7P connector terminal No. 3: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and immobilizer-keyless control unit 7P connector terminal No. 4: There should be continuity. An open in the B-CAN wire
    P5 BLU Gauge control module 32P connector disconnected Check for continuity between terminal P5 and gauge control module 32P connector terminal No. 18: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and gauge control module 32P connector terminal No. 19: There should be continuity. An open in the B-CAN wire
    P5 BLU Power window master switch 37P connector disconnected Check for continuity between terminal P5 and power window master switch 37P connector terminal No. 33: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and power window master switch 37P connector terminal No. 35: There should be continuity. An open in the B-CAN wire
    P5 BLU Passenger's under-dash fuse/relay box connector A (38P) disconnected Check for continuity between terminal P5 and passenger's under-dash fuse/relay box connector A (38P) terminal No. 29: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and passenger's under-dash fuse/relay box connector A (38P) terminal No. 11: There should be continuity. An open in the B-CAN wire
    P5 BLU Climate control unit connector B(12P) disconnected Check for continuity between terminal P5 and climate control unit connector B (12P) terminal No. 2: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and climate control unit connector B (12P) terminal No. 1: There should be continuity. An open in the B-CAN wire
    P5 BLU Audio unit connector B (20P)(1) disconnected Check for continuity between terminal P5 and audio unit connector B (20P) terminal No. 8: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and audio unit connector B (20P) terminal No. 18: There should be continuity. An open in the B-CAN wire
    P5 BLU HandsFreeLink control unit 28P connector(2) disconnected Check for continuity between terminal P5 and HandsFreeLink control unit 28P connector terminal No. 17: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and HandsFreeLink control unit 28P connector terminal No. 18: There should be continuity. An open in the B-CAN wire
    P5 BLU Power seat control unit connector B (40P)(3) disconnected Check for continuity between terminal P5 and power seat control unit connector B (40P) terminal No. 39: There should be continuity. An open in the B-CAN wire
    P6 PNK Check for continuity between terminal P6 and power seat control unit connector B (40P) terminal No. 40: There should be continuity. An open in the B-CAN wire
    P5 BLU Disconnect these connectors:
    • Immobilizer-keyless control unit 7P connector
    • Gauge control module 32P connector
    • Power window master switch 37P connector
    • Passenger's under-dash fuse/relay box connector A (38P)
    • Climate control unit connector B(12P)
    • Audio unit connector B (20P)(1)
    • HandsFreeLink control unit 28P connector(2)
    • Power seat control unit connector B (40P)(3)
    		 Check for continuity to ground: There should be no continuity. A short to ground in the B-CAN wire
    P6 PNK
    Q16 LT BLU Under all conditions Check for continuity between terminal Q16 and data link connector (DLC) 16P connector terminal No. 7: There should be continuity. An open in the B-CAN wire
    (1) With premium audio system
    (2) With HandsFreeLink
    (3) With DPMS
  6. Reconnect the connectors to the passenger's under-dash fuse/relay box
  7. Turn the ignition switch to ON (II), 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 test prove OK, go to step 8.
NOTE: These are power and ground tests for the multiplex integrated control unit.
TEST CONDITION REFERENCE CHART

Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
Q1 BLK In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground(G502)
  • An open or high resistance in the ground wire
Q2 BRN View Of
In all ignition switch positions		 Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground (G501)
  • An open or high resistance in the ground wire
R2 BRN In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground (G501)
  • An open or high resistance in the ground wire
R5 BLK In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground(G502)
  • An open or high resistance in the ground wire
N12 BLK In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground (G502)
  • An open or high resistance in the ground wire
P9 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.
  • Blown No. 15(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
P20 BRN Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.
  • Blown No. 5 (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
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