( TL19E00J32100041953FCAT00 )

Exterior Lights (Driver's and Passenger's MICU) Input Test

NOTE:

- Before testing, make sure that there is no DTC and the B-CAN line is OK with the HDS.
- Before testing, check the No. 27 (10 A), No. 28 (10 A), and No. 30 (15 A) fuses in the driver's under-dash fuse/relay box and the No. 1 (10 A), No. 2 (10 A), and No. 4 (15 A) fuses in the passenger's under-dash fuse/relay box.

Driver's MICU

1. Turn the ignition switch to LOCK (0).

1. Remove the driver's dashboard undercover, then remove the dashboard lower cover.

1. Disconnect driver's under-dash fuse/relay box connectors B, D, F, P, Q, and R.
   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 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 6 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   Q1

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G502)
   - An open in the wire

   Q2

   BRN

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G501)
   - An open in the wire

   R2

   BRN

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G501)
   - An open in the wire

   R5

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G502)
   - An open in the wire

   F11 (LHD model)

   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
   - An open in the wire

   P9 (RHD model)

   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 passenger's under-dash fuse/relay box
   - An open in the wire

   F17

   BLU

   Under all conditions

   Measure the voltage to ground: There should be battery voltage.

   - Blown No. 3-3 (DR LT MAIN) (50 A) fuse in the under-hood fuse/relay box
   - An open in the wire

   F19

   BLK/RED

   Under all conditions

   Measure the voltage to ground: There should be battery voltage.

   - Blown No. 3-5 (DR LT MAIN) (40 A) fuse in the under-hood fuse/relay box
   - An open in the wire

   D11

   RED

   Under all conditions

   Connect the F19 and D11 terminals with a jumper wire: The taillights and the license plate lights should come on.(With daytime running lights, the front position lights also should come on.)

   - Blown bulb
   - Poor ground (G201 *3 , G302 *3 , G901)
   - An open in the wire

   *: | With daytime running lights

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   F10

   RED [GRY]

   Under all conditions

   Connect the F19 and F10 terminals with a jumper wire: The left [right] front position light should come on.

   - Blown bulb
   - Poor ground (G302) [G201]
   - An open in the wire

   F13

   WHT/RED [WHT]

   Under all conditions

   Connect the F19 and F13 terminals with a jumper wire: The left [right] headlight (high beam) should come on.

   - Blown bulb
   - Poor ground (G302) [G201]
   - An open in the wire

   F21

   RED/YEL [BRN]

   Under all conditions

   Connect the F19 and F21 terminals with a jumper wire: The left [right] headlight (low beam) should come on.

   - Blown bulb
   - Poor ground (G302) [G201]
   - Faulty HID unit
   - An open in the wire

   Q8 | GRN | Under all conditions | Check for continuity between the Q8 terminal and passenger's under-dash fuse/relay box connector A (38P) No. 17 terminal: There should be continuity. | An open in the wire
   Check for continuity between the Q8 terminal and the automatic lighting/rain sensor *1 6P connector No. 1 terminal: There should be continuity. | An open in the wire
   R3 | BLK | Under all conditions | Check for continuity between the R3 terminal and the combination light switch 12P connector No. 12 (or No. 7) *2 terminal: There should be continuity. | An open in the wire

   [ ]: | RHD model

   *1: | With automatic lighting system
   *2: | KQ model

1. Reconnect the connectors to the driver's 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, go to Step 7 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---
   B1 | BLU | Under all conditions | Measure the voltage to ground: There should be battery voltage. | Faulty driver's under-dash fuse/relay box

   P9 (LHD model)

   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 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

   D12

   BRN

   Driver's door open

   Measure the voltage to ground: There should be less than 1 V.

   - Faulty driver's door switch
   - An open in the wire

   Driver's door closed

   Measure the voltage to ground: There should be more than 5 V.

   - Faulty driver's door switch
   - A short to ground in the wire

   Q18

   WHT

   Ignition key inserted into the ignition switch

   Measure the voltage to ground: There should be less than 1 V.

   - Faulty ignition key switch
   - Poor ground (G503)
   - An open in the wire

   Ignition switch LOCK (0), and the ignition key removed from the ignition switch

   Measure the voltage to ground: There should be more than 5 V.

   - Faulty ignition key switch
   - A short to ground in the wire

   R6

   RED

   Combination light switch OFF

   Measure the voltage between R6 and R3 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

   Measure the voltage between R6 and R3 terminals: There should be 5 V or more.

   - Faulty combination light switch
   - A short to ground in the wire

   R7

   GRY

   Combination light switch (SMALL position) ON

   Measure the voltage between R7 and R3 terminals: There should be less than 1 V.

   - Faulty combination light switch
   - An open in the wire

   Combination light switch OFF

   Measure the voltage between R7 and R3 terminals: There should be 5 V or more.

   - Faulty combination light switch
   - A short to ground in the wire

   R8

   BRN

   Combination light switch (headlight) ON

   Measure the voltage between R8 and R3 terminals: There should be less than 1 V.

   - Faulty combination light switch
   - An open in the wire

   Combination light switch OFF

   Measure the voltage between R8 and R3 terminals: There should be 5 V or more.

   - Faulty combination light switch
   - A short to ground in the wire

   R21

   GRN

   Combination light switch lever pulled (Passing)

   Measure the voltage between R21 and R3 terminals: There should be less than 1 V.

   - Faulty combination light switch
   - An open in the wire

   Combination light switch OFF

   Measure the voltage between R21 and R3 terminals: There should be 5 V or more.

   - Faulty combination light switch
   - A short to ground in the wire

   R22

   LT BLU

   Combination light switch (Dimmer) in high beam position

   Measure the voltage between R22 and R3 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

   Measure the voltage between R22 and R3 terminals: There should be 5 V or more.

   - Faulty combination light switch
   - A short to ground in the wire