2012 Acura RLFACTORY OEM SERVICE PROCEDURE

Power Mirror Circuit Input Test: MICU: Notes

  1. Turn the ignition switch to LOCK (0).
  2. Remove the left kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
  3. Disconnect driver's under-dash fuse/relay box connector P (30P).
    Fig 1: Disconnecting Driver's Under-Dash Fuse/Relay Box Connector P (30P)
    G07363715Courtesy 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. Reconnect the connector to the driver's under-dash fuse/relay box, 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 tests prove OK, go to step 6.
    TEST CONDITION AND WIRE REFERENCE CHART

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    P9 WHT Power mirror switch in UP Measure the voltage to ground: There should be less than 0.2 V.
    • Poor ground(G501) or an open in the ground wire
    • Faulty power mirror switch
    • An open or high resistance in the wire
    Power mirror switch released Measure the voltage to ground: There should be at least 5 V.
    • Faulty power mirror switch
    • Faulty MICU
    P10 PNK Power mirror switch in DOWN Measure the voltage to ground: There should be less than 0.2 V.
    • Poor ground(G501)or an open in the ground wire
    • Faulty power mirror switch
    • An open or high resistance in the wire
    Power mirror switch released Measure the voltage to ground: There should be at least 5 V.
    • Faulty power mirror switch
    • Faulty MICU
    P25 GRN Power mirror switch in LEFT Measure the voltage to ground: There should be less than 0.2 V.
    • Poor ground(G501) or an open in the ground wire
    • Faulty power mirror switch
    • An open or high resistance in the wire
    Power mirror switch released Measure the voltage to ground: There should be at least 5 V.
    • Faulty power mirror switch
    • Faulty MICU
    P26 BLU Power mirror switch in RIGHT Measure the voltage to ground: There should be less than 0.2 V.
    • Poor ground(G501) or an open in the ground wire
    • Faulty power mirror switch
    • An open or high resistance in the wire
    Power mirror switch released Measure the voltage to ground: There should be at least 5 V.
    • Faulty power mirror switch
    • Faulty MICU
    P11 PUR Power mirror switch in L position Measure the voltage to ground: There should be less than 0.2 V.
    • Poor ground(G501) or an open in the ground wire
    • Faulty power mirror switch
    • An open or high resistance in the wire
    Power mirror switch released Measure the voltage to ground: There should be at least 5 V.
    • Faulty power mirror switch
    • Faulty MICU
    P22 GRY Power mirror switch in R position Measure the voltage to ground: There should be less than 0.2 V.
    • Poor ground(G501) or an open in the ground wire
    • Faulty power mirror switch
    • An open or high resistance in the wire
    Power mirror switch released Measure the voltage to ground: There should be at least 5 V.
    • Faulty power mirror switch
    • Faulty MICU
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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