Keyless/Power Door Locks/Security System (MICU) Input Test

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
• Before testing, make sure the No. B21 (10 A) fuse in the under-hood fuse/relay box is OK.
• Before testing, make sure the No. C4 (10 A), No. C5 (10 A), No. C6 (10 A), No. C7 (10 A), No. C12 (10 A), and No. C13 (10 A) fuses in the under-dash fuse/relay box are OK.
• Before testing, make sure the headlights, parking lights, side marker lights, taillights, turn signal/hazard warning lights, and horns are work properly.
• There are three pairs of fuses in the same circuit (No. C4 and No. C12 fuses, No. C5 and No. C13 fuses, and No. C6 and No. C7 fuses). If one fuse is blown, make sure to check the other fuse in the same circuit. If necessary, replace the blown fuse(s).

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

2. Disconnect under-dash fuse/relay box connectors A, D, F, H, N, Q, and R.

NOTE:  All connector views are shown from the wire side of the female terminals.

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.

NOTE:  These are door lock actuator operation tests for keyless entry.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
N16	PNK	Connect 12 volt battery power* with N16 (or N17), and ground terminal N17 (or N16) with jumper wires.	Check actuator operation: The driver's door lock actuator should LOCK (or UNLOCK).	Faulty driver's door lock actuator An open or high resistance in the wire
N17	GRY
F2	PNK	Connect 12 volt battery power* with F2 (or F8), and ground terminal F8 (or F2) with jumper wires.	Check actuator operation: The front passenger's door lock actuator should LOCK (or UNLOCK).	Faulty front passenger's door lock actuator An open or high resistance in the wire
F8	PUR
N7	BLU	Connect 12 volt battery power* with N7 (or N3), and ground terminal N3 (or N7) with jumper wires.	Check actuator operation: The left rear door lock actuator should LOCK (or UNLOCK).	Faulty left rear door lock actuator An open or high resistance in the wire
N3	YEL
N13	PNK	Connect 12 volt battery power* with N13 (or N14), and ground terminal N14 (or N13) with jumper wires.	Check actuator operation: The right rear door lock actuator should LOCK (or UNLOCK).	Faulty right rear door lock actuator An open or high resistance in the wire
N14	PUR
N2	GRN	Connect 12 volt battery power* and N2 with jumper wire.	Check actuator operation: The tailgate release actuator should UNLOCK.	Faulty tailgate release actuator Poor ground (G504) or an open in the ground wire An open or high resistance in the wire

*: Use a fused jumper wire with an appropriate amperage fuse.

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
Q15	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. B21 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
R2	YEL	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. D1-3 (50 A) fuse in the auxiliary under-dash fuse box A An open or high resistance in the wire
D23	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire
H1	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G401) An open or high resistance in the ground wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
N6	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G502) An open or high resistance in the ground wire
N38	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G502) An open or high resistance in the ground wire
Q35	BLU	Hood closed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty security hood switch Poor ground (G302) or an open in the ground wire An open or high resistance in the wire
		Hood open	Measure the voltage to ground: There should be about 5 V.	Faulty security hood switch A short to ground in the wire
N23	BRN	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
		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
D12	LT GRN	Driver's door lock switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door lock switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
		Driver's door lock switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door lock switch A short to ground in the wire
D17	RED	Driver's door lock switch in LOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door lock switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
		Driver's door lock switch in UNLOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door lock switch A short to ground in the wire
D10	BRN	Driver's door key cylinder switch in neutral or UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door key cylinder switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
		Driver's door key cylinder switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door key cylinder switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D11	PNK	Driver's door key cylinder switch in LOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door key cylinder switch Poor ground (G401) or an open in the ground wire An open or high resistance in the wire
		Driver's door key cylinder switch in neutral or UNLOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door key cylinder switch A short to ground in the wire
D15	TAN	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 (G401) or an open in the ground wire An open or high resistance in the wire
		Driver's door lock knob switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door key cylinder switch An open or high resistance in the wire
D3	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 (G401) or an open in the ground wire An open or high resistance in the wire
		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
N34	GRN	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
		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
A4	WHT	Front passenger's door lock knob switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty front passenger's door lock knob switch Poor ground (G403) or an open in the ground wire An open or high resistance in the wire
		Front passenger's door lock knob switch in UNLOCK	Measure the voltage to ground: There should be about 5 V.	Faulty front passenger'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
N39	GRY	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
		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
N37	WHT	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
		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
N27	GRY	Left rear door lock knob switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty left rear door lock knob switch Poor ground (G502) or an open in the ground wire An open or high resistance in the wire
		Left rear door lock knob switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty left rear door lock knob switch A short to ground in the wire
N52	TAN	Right rear door lock knob switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty right rear door lock knob switch Poor ground (G501) or an open in the ground wire An open or high resistance in the wire
		Right rear door lock knob switch in LOCK	Measure the voltage to ground: There should be about 5 V.	Faulty right rear door lock knob switch A short to ground in the wire
N26	PNK	Tailgate latch switch pressed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate latch switch Poor ground (G504) or an open in the ground wire An open or high resistance in the wire
		Tailgate latch switch released	Measure the voltage to ground: There should be about 5 V.	Faulty tailgate latch switch A short to ground in the wire
N42* 1	BLU	Tailgate outer handle switch pressed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate outer handle switch Poor ground (G504) or an open in the ground wire An open or high resistance in the wire
		Tailgate outer handle switch released	Measure the voltage to ground: There should be about 5 V.	Faulty tailgate outer handle switch A short to ground in the wire

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D4* 1	PNK	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 (G401) or an open in the ground wire An open or high resistance in the wire
		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
D4* 2	PNK	Disconnect the keyless access control unit connector A (32P)	Check for continuity between terminal D4 and keyless access control unit connector A (32P) terminal No. 2:There should be continuity.	An open or high resistance in the wire
Q22* 3	YEL	Transmission range switch in P	Measure the voltage to ground: There should be less than 0.2 V.	Faulty or improperly adjusted transmission range switch Poor ground (G101) or an open in the ground wire An open or high resistance in the wire
		Transmission range switch in any other position than P	Measure the voltage to ground: There should be about 5 V.	A short to ground in the wire Faulty or improperly adjusted transmission range switch

*1: Without keyless access system

*2: With keyless access system

*3: CVT