Exterior Lights (MICU) Input Test
  1. Check the No. 1 (7.5 A), No. 12 (10 A), No. 13 (10 A), No. 15 (7.5 A), No. 16 (15 A) [(10 A)], No. 17 (15 A) [(10 A)], No. 18 (20 A), No. 19 (15 A), and No. 21 (30 A) [(20 A)] fuses in the under-dash fuse/relay box. If any fuse is blown, replace it and go to Step 2 .
    [ ]:
    Without HID

  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 4 .
  1. With the connectors still disconnected, 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, go to Step 5 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    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-dash fuse/relay box
    • An open in the wire
    G18
    WHT
    Under all conditions
    Check for voltage between G18 terminal and body ground: There should be battery voltage.
    • Blown No. 2 (H/L) (60 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    G19
    WHT
    Under all conditions
    Check for voltage between G19 terminal and body ground: There should be battery voltage.
    • Blown No. 4 (OP) (80 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    F4
    GRN
    Under all conditions
    Connect battery power to the F4 terminal. The right headlight (low beam) should come on.
    • Poor ground (G201)
    • Blown bulb
    • An open in the wire
    F22
    WHT
    Under all conditions
    Connect battery power to the F22 terminal: The right headlight (high beam) should come on.
    • Poor ground (G201)
    • Blown bulb
    • An open in the wire
    G15
    RED
    Under all conditions
    Connect battery power to the G15 terminal: The left headlight (high beam) should come on.
    • Poor ground (G301)
    • Blown bulb
    • An open in the wire
    G17
    YEL
    Under all conditions
    Connect battery power to the G17 terminal: The left headlight (low beam) should come on.
    • Poor ground (G301)
    • Blown bulb
    • An open in the wire
    E19 *1
    RED
    Under all conditions
    Connect battery power to the E19 terminal: The taillights and license plate lights should come on.
    • Poor ground (G603, G651, G652)
    • Blown bulb
    • An open in the wire
    F3 *1
    RED
    Under all conditions
    Connect battery power to the F3 terminal: The right front position light should come on.
    • Poor ground (G201)
    • Blown bulb
    • An open in the wire
    G5 *1
    RED
    Under all conditions
    Connect battery power to the G5 terminal: The left front position light should come on.
    • Poor ground (G301)
    • Blown bulb
    • An open in the wire
    M3 *2
    RED
    Under all conditions
    Connect battery power to the M3 terminal: The front position lights, taillights and license plate lights should come on.
    • Poor ground (G201, G301, G603, G652)
    • Faulty daytime running lights relay
    • Blown bulb
    • An open in the wire
    R17 *2
    BLU
    Under all conditions
    Check for continuity between the R17 terminal and T8 terminal: There should be continuity.
    • Faulty daytime running lights relay
    • An open in the wire
    T8 *2
    GRN
    R16
    WHT
    Under all conditions
    Check for continuity between the R16 terminal and the No. 2 terminal of the automatic lighting/rain sensor 5P connector: There should be continuity.
    • Automatic lighting/rain sensor
    • An open in the wire
    Q10 *2
    ORN
    Under all conditions
    Connect battery power to the T8 terminal and ground the R17 terminal, then connect battery power to the Q10 terminal: The front position lights, taillights and license plate lights should come on.
    • Poor ground (G201, G301, G603, G652)
    • Faulty daytime running lights relay
    • Blown bulb
    • An open in the wire
    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


    *1:
    Except KS model
    *2:
    KS model
    [ ]:
    RHD Type

  1. Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the connectors.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    S1·S5
    RED·BLK
    Combination light switch OFF
    Check for voltage between S1 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch in any other position than OFF
    Check for voltage between S1 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S11·S5
    BRN·BLK
    Combination light switch (Headlight position) ON
    Check for voltage between S11 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch OFF
    Check for voltage between S11 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S12·S5
    RED·BLK
    Combination light switch lever pulled (Passing)
    Check for voltage between S12 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch lever released from passing position
    Check for voltage between S12 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S13·S5
    GRY·BLK
    Combination light switch (SMALL position) ON
    Check for voltage between S13 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch OFF
    Check for voltage between S13 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S16·S5
    LT BLU·BLK
    Combination light switch (Dimmer) in high beam position
    Check for voltage between S16 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch (Dimmer) in low beam position
    Check for voltage between S16 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S7·S5
    BLU·BLK
    Combination light switch in front/rear fog or rear fog position
    Check for voltage between S7 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch OFF
    Check for voltage between S7 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire
    S14·S5
    PUR·BLK
    Combination light switch in rear fog or rear fog position
    Check for voltage between S14 and S5 terminals: There should be less than 1 V.
    • Faulty combination light switch
    • An open in the wire
    Combination light switch OFF
    Check for voltage between S14 and S5 terminals: There should be 5 V or more.
    • Faulty combination light switch
    • A short to ground in the wire