Entry Lights Control System (MICU and Door Multiplex Control Unit) 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. A28 (7.5 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) fuse in the under-dash fuse/relay box is OK.

MICU

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 D (32P)

Under-dash fuse/relay box connector N (13P)

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

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

Under-dash fuse/relay box connector X (10P)

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

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

3. Inspect the connectors 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.

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
P11^*	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

*: 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 .^*1
If all the input tests prove OK, then go to step 6.^*2

*1: Without door multiplex control unit *2: With door multiplex control unit

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
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
B40	GRN	Driver's door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door switch Faulty driver's door switch ground An open or high resistance in the wire
B40	GRN	Driver's door closed	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door switch A short to ground in the wire

*1: Without power tailgate *2: With power tailgate *3: Without keyless access system *4: Without door multiplex control unit *5: Without moonroof *6: With moonroof

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B29	BRN	Front passenger's door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty front passenger's door switch Faulty front passenger's door switch ground An open or high resistance in the wire
B29	BRN	Front passenger's door closed	Measure the voltage to ground: There should be about 5 V.	Faulty front passenger's door switch A short to ground in the wire
B33	WHT	Left rear door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty left rear door switch Faulty left rear door switch ground An open or high resistance in the wire
B33	WHT	Left rear door closed	Measure the voltage to ground: There should be about 5 V.	Faulty left rear door switch A short to ground in the wire
B34	GRY	Right rear door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty right rear door switch Faulty right rear door switch ground An open or high resistance in the wire
B34	GRY	Right rear door closed	Measure the voltage to ground: There should be about 5 V.	Faulty right rear door switch A short to ground in the wire
B22	PNK	Tailgate open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate latch switch^1 Power tailgate closer unit^2 Poor ground (G603) or an open in the ground wire^1 Power tailgate control unit^2 An open or high resistance in the wire
B22	PNK	Tailgate closed	Measure the voltage to ground: There should be about 5 V.	Faulty tailgate latch switch Power tailgate closer unit^*2 A short to ground in the wire
P11^*3	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^*3	GRY	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

*1: Without power tailgate *2: With power tailgate *3: Without keyless access system *4: Without door multiplex control unit *5: Without moonroof* 6: With moonroof

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
X4^*4	WHT	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
X4^*4	WHT	Driver's door lock knob switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door lock knob switch A short to ground in the wire
X5^*4	LT GRN	Driver's door lock knob switch in LOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
X5^*4	LT GRN	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door lock knob switch A short to ground in the wire
W3 • N6	PNK • PUR	Ceiling light switch in MIDDLE position and interior light switch in DOOR position	Connect terminal W3 to ground, and terminal N6 to ground with jumper wires: The ceiling light and front individual map lights should come on.	Blown No. A28 (7.5 A) fuse in the under-hood fuse/relay box Blown bulb Faulty ceiling light Faulty front individual map lights Faulty interior light switch^5 Faulty moonroof light switch^6 Faulty interior light cut relay An open or high resistance in the wire
W3 • B39	PNK • ORN	Tailgate light switch DOOR position	Connect terminal W3 to ground, and terminal B39 to ground with jumper wires: The cargo area light should come on.	Blown No. A28 (7.5 A) fuse in the under-hood fuse/relay box Blown bulb Faulty cargo area light Faulty interior lights cut relay Faulty under-dash fuse/relay box An open or high resistance in the wire
W3^3 • P12^3	PNK • LT GRN	Under all conditions	Connect terminal W3 to ground, and terminal P12 to ground with jumper wires: The ignition key light should come on.	Blown No. A28 (7.5 A) fuse in the under-hood fuse/relay box Faulty LED Faulty interior lights cut relay Faulty under-dash fuse/relay box An open or high resistance in the wire

*1: Without power tailgate *2: With power tailgate *3: Without keyless access system *4: Without door multiplex control unit *5: Without moonroof *6: With moonroof

Door Multiplex Control Unit

6. Disconnect the following connector.

Power window master switch 37P connector

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

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

8. Inspect the connector and socket terminals to be sure they are all making good contact:

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 9.

9. Reconnect the connectors to the power window master switch; 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 10.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
26	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 Faulty under-dash fuse/relay box An open or high resistance in the wire
3	BLK	In 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
31	BLK	In all power modes, disconnect the driver's power window motor 6P connector	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
33	LT GRN	Driver's door lock knob switch in LOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
33	LT GRN	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door lock knob switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
32	WHT	Driver's door lock knob switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
32	WHT	Driver's door lock knob switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door lock knob switch A short to ground in the wire

10.If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU) . If input failures are related to a particular control unit, replace the power window master switch .