( TL19E00J32173641953FCAT00 )

Turn Signal/Hazard Warning Lights (Driver's MICU) Input Test

Driver's MICU
NOTE: Before testing, check the No. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box.

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 D, F, N, 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 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 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 [P9]

   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 fuse/relay box (RHD model)
   - An open in the wire

   F32

   WHT

   Under all conditions

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

   - Blown No. 9 (15 A) fuse in the under-hood fuse/relay box
   - An open in the wire

   D7

   GRN

   Ignition switch ON (II)

   Connect F32 and D7 terminals with a jumper wire:
   The right rear turn signal light should come on.

   - Poor ground (G901)
   - Blown bulb
   - An open in the wire

   D13

   BLU

   Ignition switch ON (II)

   Connect F32 and D13 terminals with a jumper wire:
   The left rear turn signal light should come on.

   - Poor ground (G901)
   - Blown bulb
   - An open in the wire

   F1

   BLU

   Ignition switch ON (II)

   Connect F32 and F1 terminals with a jumper wire:
   The left front turn signal light should come on.

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

   P3

   GRN

   Ignition switch ON (II)

   Connect F32 and P3 terminals with a jumper wire:
   The right front turn signal light (LHD model), right side turn signal light and right turn signal indicator should come on.

   - Poor ground (G201, G501)
   - Blown bulb
   - Faulty LED
   - Faulty gauge control module
   - Faulty indicator
   - An open in the wire

   P14

   BLU

   Ignition switch ON (II)

   Connect F32 and P14 terminals with a jumper wire:
   The left front turn signal indicator, left front turn signal light (RHD model) and left side turn signal light should come on.

   - Poor ground (G505) [G302]
   - Blown bulb
   - Faulty LED
   - Faulty gauge control module
   - Faulty indicator
   - An open in the wire

   [ ]: | RHD 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, the driver's MICU must be faulty; replace the driver's under-dash fuse/relay box.

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

   N7

   WHT

   Under all conditions

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

   - Faulty driver's under-dash fuse/relay box
   - A short to ground in the wire

   Q17

   GRN

   Hazard warning switch pressed

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

   - Faulty hazard warning switch
   - An open in the wire

   R13·R3

   LT GRN·BLK

   Ignition switch ON (II), turn signal switch in left position

   Measure the voltage between R13 and R3 terminals: There should be less than 1 V.

   - Faulty combination light switch
   - An open in the wire

   Ignition switch ON (II), turn signal switch in right or neutral position

   Measure the voltage between R13 and R3 terminals: There should be 5 V or more.

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

   R14·R3

   BRN·BLK

   Ignition switch ON (II), turn signal switch in right position

   Measure the voltage between R14 and R3 terminals: There should be less than 1 V.

   - Faulty combination light switch
   - An open in the wire

   Ignition switch ON (II), turn signal switch in left or neutral position

   Measure the voltage between R14 and R3 terminals: There should be 5 V or more.

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