Turn Signal/Hazard Flasher (MICU) Input Test
NOTE: Before testing, check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is blown, replace the fuse.
  1. Turn the ignition switch OFF.
  1. Remove the driver's side kick panel.
  1. Disconnect the under-dash fuse/relay box connectors E, F, G, Q, R, S, and T.
    NOTE: All connector views are wire side of female terminals.
  1. 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 .
  1. With the connector still disconnected, make these input tests at the appropriate 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 6 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    E6
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G602) [G652]
    • An open in the wire
    E33
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G651)
    • An open in the wire
    F20
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G401)
    • An open in the wire
    T34
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G503)
    • An open in the wire
    G2
    WHT
    Under all conditions
    Check for voltage between G2 terminal and body ground: There should be battery voltage.
    • Blown No. 16 (15 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    G6
    BLU
    Under all conditions
    Check for voltage between G6 terminal and body ground: There should be battery voltage.
    • Blown No. 22 (10 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    E39
    BRN
    Under all conditions
    Connect G2 and E39 terminals with a jumper wire: The right rear turn signal light should come on.
    • Poor ground (G603) [G651]
    • Blown bulb
    • An open in the wire
    E40 *1
    BLU
    Under all conditions
    Connect G2 and E40 terminals with a jumper wire: The left rear turn signal light should come on.
    • Poor ground (G603)
    • Blown bulb
    • An open in the wire
    F1
    BRN
    Under all conditions
    Connect G2 and F1 terminals with a jumper wire: The right front turn signal light should come on.
    • Poor ground (G201)
    • Blown bulb
    • An open in the wire
    G1
    BLU
    Under all conditions
    Connect G2 and G1 terminals with a jumper wire: The left front turn signal light should come on.
    • Poor ground (G301)
    • Blown bulb
    • An open in the wire

    *1:
    LHD type

    [ ]:
    RHD type

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    M2
    BRN
    Under all conditions
    Connect G2 and M2 terminals with a jumper wire: The right rear turn signal light should come on.
    • Poor ground (G502) [G501]
    • Blown bulb
    • An open in the wire
    M1
    BLU
    Under all conditions
    Connect G2 and M1 terminals with a jumper wire: The left side *2 and rear turn signal light should come on.
    • Poor ground (G501) [G502, G603]
    • Blown bulb(s)
    • An open in the wire
    P1
    BRN
    Under all conditions
    Connect G2 and P1 terminals with a jumper wire: The right turn signal indicator should come on.
    • Faulty gauge control module (speedo)
    • Faulty indicator
    • An open in the wire
    P6
    BLU
    Under all conditions
    Connect G2 and P6 terminals with a jumper wire: The left turn signal indicator should come on.
    • Faulty gauge control module (speedo)
    • Faulty indicator
    • An open in the wire

    *1:
    LHD type
    *2:
    RHD type

    [ ]:
    RHD type

  1. Reconnect the connectors to under-dash fuse/relay box, 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 MICU must be faulty; replace the under-dash fuse/relay box.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    R1
    BLU
    Under all conditions
    Check for voltage to ground: There should be battery voltage.
    Faulty under-dash fuse/relay box
    Q11
    GRN
    Hazard warning switch pressed
    Check for voltage to ground: There should be battery voltage.
    • Faulty hazard warning switch
    • An open in the wire
    S18·S5
    BRN·BLK
    Turn signal switch in right position
    Check for voltage between S18 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Turn signal switch in left or neutral position
    Check for voltage between S18 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S19·S5
    LT GRN·BLK
    Turn signal switch in left position
    Check for voltage between S19 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Turn signal switch in right or neutral position
    Check for voltage between S19 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire