Exterior Lights (MICU) Input Test

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
Before testing, make sure the No. A2-4 (30 A), No. A19 (10 A), No. A24 (10 A), No. A25 (10 A), No. A26 (20 A), and No. A29 (10 A) fuses in the under-hood fuse/relay box are OK.
Before testing, make sure the No. B5 (10 A), No. B21 (7.5 A)^*1 , No. B34 (10 A), No. B37 (20 A)^*2 , No. B38 (10 A), and No. B39 (10 A) fuses in the under-dash fuse/relay box are OK.

*1: With LED daytime running light *2: With fog light

1. Turn the vehicle to the OFF (LOCK) mode

2. Disconnect the following connectors.

Under-dash fuse/relay box connector B (44P)

Under-dash fuse/relay box connector C (38P)

Under-dash fuse/relay box connector D (32P)

Under-dash fuse/relay box connector P (20P)

Under-dash fuse/relay box connector T (20P)

Under-dash fuse/relay box connector W (24P)

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

3. 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 are OK, go to step 4.

4. With the connectors still disconnected, do the following input tests:

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 desired result is not obtained
C19. C12	LT GRN. PUR	Connect terminal C19 and ground with a jumper wire	Measure the voltage between terminal C12 and ground: There should be battery voltage.	Faulty relay circuit board An open or high resistance in the wire
D16	BLU	Under all conditions	Connect terminal to ground with a jumper wire: The left headlight (low beam) should come on.	Faulty relay circuit board Blown bulb Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
D16	BLU	Under all conditions	Connect terminal to ground with a jumper wire: The right headlight (low beam) should come on.	Faulty relay circuit board Blown bulb Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
C18 • C1	WHT • ORN	Under all conditions	Connect terminals C18 and C1 with a jumper wire: The left headlight (high beam) should come on	Blown No. B38 (10 A) fuse in the under-dash fuse/relay box Blown bulb Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
C14 • C1	YEL • ORN	Under all conditions	Connect terminals C14 and C1 with a jumper wire: The right headlight (high beam) should come on	Blown No. B39 (10 A) fuse in the under-dash fuse/relay box Blown bulb Poor ground (G301) or an open in the ground wire An open or high resistance in the wire

*1: With fog light *2: With LED daytime running light *3: With keyless access system

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D25^*1	LT GRN	Connect terminal C1 and D8 with a jumper wire	Connect terminal to ground with a jumper wire: The left fog light should come on.	Blown No. B37 (20 A) fuse in the under-dash fuse/relay box Blown bulb Faulty fog light relay Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
D25^*1	LT GRN	Connect terminal C1 and D8 with a jumper wire	Connect terminal to ground with a jumper wire: The right fog light should come on.	Blown No. B37 (20 A) fuse in the under-dash fuse/relay box Blown bulb Faulty fog light relay Poor ground (G202) or an open in the ground wire An open or high resistance in the wire
C29^*2	RED	Under all conditions	Connect terminal to ground with a jumper wire: The left daytime running light should come on.	Blown No. A19 (10 A) fuse in the under-hood fuse/relay box Faulty LEDs Faulty daytime running light relay Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
C29^*2	RED	Under all conditions	Connect terminal to ground with a jumper wire: The right daytime running light should come on.	Blown No. A19 (10 A) fuse in the under-hood fuse/relay box Faulty LEDs Faulty daytime running light relay Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
P11^*3	GRY	Disconnect the keyless access control unit connector C (24P)	Check for continuity between terminal P11 and keyless access control unit connector C (24P) terminal No. 6: There should be continuity.	An open or high resistance in the wire

*1: With fog light *2: With LED daytime running light *3: With keyless access system

5. Reconnect the connectors to the under-dash fuse/relay box, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D17	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire

*1: Without keyless access system *2: With fog light

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
C1	ORN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A2-4 (30 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
W6	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
B32	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G604) An open or high resistance in the ground wire
B20	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G604) An open or high resistance in the ground wire
D10	BRN	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
P11^*1	GRY	Ignition key inserted into the ignition key cylinder	Measure the voltage to ground: There should be less than 0.2 V.	Faulty ignition key switch Poor ground (G502) or an open in the ground wire An open or high resistance in the wire
P11^*1	GRY	Vehicle OFF (LOCK) mode, and the ignition key removed from the ignition key cylinder	Measure the voltage to ground: There should be about 5 V.	Faulty ignition key switch A short to ground in the wire
T1 • T5	TAN • BLK	Combination light switch OFF	Measure the voltage between terminals T1 and T5: There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
T1 • T5	TAN • BLK	Combination light switch in any position other than OFF	Measure the voltage between terminals T1 and T5: There should be about 5 V.	Faulty combination light switch A short to ground in the wire
T3 • T5	BLU • BLK	Combination light switch (PARKING position) ON	Measure the voltage between terminals T3 and T5: There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
T3 • T5	BLU • BLK	Combination light switch OFF	Measure the voltage between terminals T3 and T5: There should be about 5 V.	Faulty combination light switch A short to ground in the wire
T2 • T5	WHT • BLK	Combination light switch (headlight) ON	Measure the voltage between terminals T2 and T5: There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
T2 • T5	WHT • BLK	Combination light switch OFF	Measure the voltage between terminals T2 and T5: There should be about 5 V.	Faulty combination light switch A short to ground in the wire
T11 • T5	RED • BLK	Combination light switch lever pulled (Passing)	Measure the voltage between terminals T11 and T5: There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
T11 • T5	RED • BLK	Combination light switch lever released (OFF)	Measure the voltage between terminals T11 and T5: There should be about 5 V.	Faulty combination light switch A short to ground in the wire

*1: Without keyless access system *2: With fog light

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
T12 • T5	LT BLU • BLK	Combination light switch (Dimmer) in high beam position	Measure the voltage between terminals T12 and T5: There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
T12 • T5	LT BLU • BLK	Combination light switch (Dimmer) in low beam position	Measure the voltage between terminals T12 and T5: There should be about 5 V.	Faulty combination light switch A short to ground in the wire
T4^2 • T5^2	PUR • BLK	Fog light switch ON	Measure the voltage between terminals T4 and T5: There should be less than 0.2 V.	Faulty combination light switch An open or high resistance in the wire
T4^2 • T5^2	PUR • BLK	Fog light switch OFF	Measure the voltage between terminals T4 and T5: There should be about 5 V.	Faulty combination light switch A short to ground in the wire

*1: Without keyless access system *2: With fog light