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Turn Signal/Hazard Warning Lights (MICU) Input Test

NOTE: Before testing, check the No. 1 (10 A), No. 22 (7.5 A), and No. 23 (10 A) fuse in the under-dash fuse/relay box.
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the under-dash fuse/relay box connectors A, B, C, E, K, M, N, Q, and W.
    NOTE:
    • All connector views are shown from wire side of female terminals.
    • The illustration shows the RHD model and the black portion shows the lock lever. The lock lever for LHD model is shown as the dashed lines.
  1. With the connectors still disconnected, make these input tests at the appropriate connector.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    K10
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    N2
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    M16
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    Q9
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    B23
    WHT
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 3 (20 A *4 /30 A *3 ) fuse in the battery terminal fuse box
    • An open in the wire
    W1
    YEL
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 60 (50 A) fuse in the under-dash fuse/relay box
    • Faulty ignition switch
    • An open in the wire
    A28
    WHT
    Connect B23 terminal to A28 terminal with a jumper wire.
    Check the turn signal lights operation: The right front turn signal light and right side turn signal light *1 should come on.
    • Poor ground (G202, G301) [G401, G451]
    • Blown bulb
    • An open in the wire
    C41
    WHT
    Connect B23 terminal to C41 terminal with a jumper wire.
    Check the turn signal light operation: The right rear turn signal light should come on.
    • Poor ground (G602)
    • Blown bulb
    • An open in the wire
    B34
    BLU
    Connect B23 terminal to B34 terminal with a jumper wire.
    Check the turn signal lights operation: The left front turn signal light and left side turn signal light *1 should come on.
    • Poor ground (G401) [G202, G302]
    • Blown bulb
    • An open in the wire
    C13
    BLU [WHT]
    Connect B23 terminal to C13 terminal with a jumper wire.
    Check the turn signal light operation: The left rear turn signal light should come on.
    • Poor ground (G604)
    • Blown bulb
    • An open in the wire
    Q6
    WHT
    Connect B23 terminal to Q6 termanal with a jumper wire.
    Check the turn signal lights operation: The right side turn signal light *2 and/or right turn signal indicator should come on.
    • Poor ground (G501) [G502]
    • Faulty LED *2
    • Faulty gauge control module
    • Faulty indicator
    • An open in the wire
    M20
    BLU
    Connect B23 terminal to M20 terminal with a jumper wire.
    Check the turn signal lights operation: The left side turn signal light *2 and/or left turn signal indicator should come on.
    • Poor ground (G502) [G501]
    • Faulty LED *2
    • Faulty gauge control module
    • Faulty indicator
    • An open in the wire
    E11 *5
    WHT
    Connect B23 terminal to E11 terminal with a jumper wire.
    Check the turn signal light operation: The right side turn signal light *2 should come on.
    • Poor ground (G501)
    • Faulty LED *2
    • An open in the wire
    E7 *6
    BLU
    Connect B23 terminal to E7 terminal with a jumper wire.
    Check the turn signal light operation: The left side turn signal light *2 should come on.
    • Poor ground [G501]
    • Faulty LED *2
    • An open in the wire

    *1:
    Fender type
    *2:
    Mirror type
    *3:
    With trailer lighting connector
    *4:
    Without trailer lighting connector
    *5:
    RHD model
    *6:
    LHD model
    [ ]:
    LHD model

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    N5 · Q13
    YEL · PNK
    Hazard warning switch pressed
    Check for continuity between N5 and Q13 terminals:There should be continuity.
    • Faulty hazard warning switch
    • An open in the wire
    Hazard warning switch released
    Check for continuity between N5 and Q13 terminals:There should be no continuity.
    • Faulty hazard warning switch
    • A short in the wire
    M2 · M33
    LT GRN · BLK
    Turn signal switch in LEFT position
    Check for continuity between M2 and M33 terminals: There should be continuity
    • Faulty combination light switch
    • An open in the wire
    Turn signal switch in RIGHT or neutral position
    Check for continuity between M2 and M33 terminals: There should be no continuity.
    • Faulty combination light switch
    • A short in the wire
    M6 · M33
    BRN · BLK
    Turn signal switch in RIGHT position
    Check for continuity between M6 and M33 terminals: There should be continuity.
    • Faulty combination light switch
    • An open in the wire
    Turn signal switch in LEFT or neutral position
    Check for continuity between M6 and M33 terminals: There should be no continuity.
    • Faulty combination light switch
    • A short in the wire