( TL19E00J32127141953FCAT00 )

Fog 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. 26 (10 A) fuse in the driver's under-dash fuse/relay box and the No. 3 (10 A) and No. 17 (7.5 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 F, G, 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 [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 under-dash fuse/relay box (RHD model)
   - An open in the wire

   F17 (LHD model)

   GRN

   Under all conditions

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

   - Blown No. 3-3 (AS 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

   R3 | BLK | Under all conditions | Check for continuity between the R3 terminal and the combination light switch 12P connector No. 12 (or No. 7) * terminal: There should be continuity. | An open in the wire
   R6 | RED | Combination light switch OFF | Check for continuity between the R6 and R3 terminals:There should be continuity. | An open in the wire
   R9 | ORN | Rear fog light switch ON | Check for continuity between R9 and R3 terminals: There should be continuity. | An open in the wire
   Rear fog light switch OFF | Check for continuity between R9 and R3 terminals: There should be no continuity. | A short to ground in the wire
   R10 | PUR | Front fog light switch ON | Check for continuity between R10 and R3 terminals: There should be continuity. | An open in the wire
   Front fog light switch OFF | Check for continuity between R10 and R3 terminals: There should be no continuity. | A short to ground in the wire

   G12

   BLU/YEL [LT BLU]

   Under all conditions

   Connect the F19 and G12 terminals with a jumper wire: The left [right] front fog light should come on.

   - Blown bulb
   - Poor ground (G302) [G201]
   - 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

   [ ]: | RHD model

   *: | KQ model

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. 26 (10 A) fuse in the driver's under-dash fuse/relay box and the No. 3 (10 A) and No. 17 (7.5 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 F, G, 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 [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 under-dash fuse/relay box (RHD model)
   - An open in the wire

   F17 (LHD model)

   GRN

   Under all conditions

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

   - Blown No. 3-3 (AS 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

   R3 | BLK | Under all conditions | Check for continuity between the R3 terminal and the combination light switch 12P connector No. 12 (or No. 7) * terminal: There should be continuity. | An open in the wire
   R6 | RED | Combination light switch OFF | Check for continuity between the R6 and R3 terminals:There should be continuity. | An open in the wire
   R9 | ORN | Rear fog light switch ON | Check for continuity between R9 and R3 terminals: There should be continuity. | An open in the wire
   Rear fog light switch OFF | Check for continuity between R9 and R3 terminals: There should be no continuity. | A short to ground in the wire
   R10 | PUR | Front fog light switch ON | Check for continuity between R10 and R3 terminals: There should be continuity. | An open in the wire
   Front fog light switch OFF | Check for continuity between R10 and R3 terminals: There should be no continuity. | A short to ground in the wire

   G12

   BLU/YEL [LT BLU]

   Under all conditions

   Connect the F19 and G12 terminals with a jumper wire: The left [right] front fog light should come on.

   - Blown bulb
   - Poor ground (G302) [G201]
   - 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

   [ ]: | RHD model

   *: | KQ model

Passenger's MICU

1. Turn the ignition switch to LOCK (0), and remove the passenger's side kick panel.

1. Disconnect passenger's under-dash fuse/relay box connectors A, B, E, and F.
   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 9

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 10 .

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

   A36

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G505)
   - An open in the wire

   A37

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G505)
   - An open in the wire

   E15

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

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

   E16

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

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

   A8 [F1]

   WHT [GRN]

   Under all conditions

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

   - Blown No. 3-3 (AS LT MAIN) (50 A) fuse in the under-hood fuse/relay box
   - Faulty driver's under-dash fuse/relay box (LHD model)
   - An open in the wire

   B1

   GRN

   Under all conditions

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

   - Blown No. 2-2 (AS F/B OP) (40 A) fuse in the under-hood fuse/relay box
   - An open in the wire

   A17 | GRN | Under all conditions | Check for continuity between the A17 terminal and driver's under-dash fuse/relay box connector Q (20P) No. 8 terminal: There should be continuity. | An open in the wire

   A23

   WHT

   Under all conditions

   Connect the B1 and A23 terminals with a jumper wire: The rear fog light should come on.

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

   E13

   LT BLU [BLU/YEL]

   Under all conditions

   Connect the A8 [F1] and E13 terminals with a jumper wire: The right [left] front fog light should come on.

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

   [ ]: | RHD model

1. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the driver's MICU). If input failures are related to a particular control unit, replace the control unit.

Passenger's MICU

1. Turn the ignition switch to LOCK (0), and remove the passenger's side kick panel.

1. Disconnect passenger's under-dash fuse/relay box connectors A, B, E, and F.
   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 9

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 10 .

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

   A36

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G505)
   - An open in the wire

   A37

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G505)
   - An open in the wire

   E15

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

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

   E16

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

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

   A8 [F1]

   WHT [GRN]

   Under all conditions

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

   - Blown No. 3-3 (AS LT MAIN) (50 A) fuse in the under-hood fuse/relay box
   - Faulty driver's under-dash fuse/relay box (LHD model)
   - An open in the wire

   B1

   GRN

   Under all conditions

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

   - Blown No. 2-2 (AS F/B OP) (40 A) fuse in the under-hood fuse/relay box
   - An open in the wire

   A17 | GRN | Under all conditions | Check for continuity between the A17 terminal and driver's under-dash fuse/relay box connector Q (20P) No. 8 terminal: There should be continuity. | An open in the wire

   A23

   WHT

   Under all conditions

   Connect the B1 and A23 terminals with a jumper wire: The rear fog light should come on.

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

   E13

   LT BLU [BLU/YEL]

   Under all conditions

   Connect the A8 [F1] and E13 terminals with a jumper wire: The right [left] front fog light should come on.

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

   [ ]: | RHD model

1. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the driver's MICU). If input failures are related to a particular control unit, replace the control unit.