Control Unit Input Test

Remove the driver's pocket (see DASHBOARD REMOVAL/INSTALLATION ).
Disconnect the 18P connector (B) from the keyless door lock control unit (A).

Fig 1: Disconnecting 18P Connector From Keyless Door Lock Control Unit
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Inspect the connector and socket terminals to be sure they are 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.

With the connector still disconnected, make these input tests at the 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 5.

CONNECTOR INPUT TEST REFERENCE

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
2	GRN/RED	Under all conditions	Attach to ground: Ceiling light should come on.	Blown No. 19 (7.5 A) fuse in the under-dash fuse/relay box Blown ceiling light bulb An open in the wire
3	ORN	Under all conditions	Attach to ground: The horn should sound.	Faulty horn Faulty horn relay An open in the wire
4	RED/WHT	Combination light switch ON	Check for voltage to ground: There should be battery voltage.	Blown No. 16 (30 A) fuse in the under-hood fuse/relay box Faulty taillight relay An open in the wire
6	YEL/BLK	Connect No. 8 terminal to the No. 6 terminal, and No. 7 and No. 18 terminals to the No. 17 terminal momentarily.	Check door lock operation: Both doors and hatch should lock.	Faulty actuator An open in the wire
7	YEL/GRN	Connect No. 8 terminal to the No. 7 terminal, and No. 6 terminal to the No. 17 terminal momentarily.	Check door lock operation: Driver's door should unlock.	Faulty driver's door lock actuator An open in the wire
18	YEL	Connect No. 8 terminal to the No. 18 terminal, and No. 6terminal to the No. 17 terminal momentarily.	Check door lock operation: Passenger's door and hatch should unlock.	Faulty passenger's door lock actuator Faulty hatch lock actuator An open in the wire

Fig 2: Identifying Keyless Door Lock 18P Connector Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Reconnect the 18P connector to the keyless door lock control unit, and make these input tests at the connector.

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the control unit must be faulty; replace the keyless door lock control unit.

CONNECTOR INPUT TEST REFERENCE

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
17	BLK	Under all conditions	Check for voltage to ground: There should be less than 1 V.	Poor ground (G401, G402) An open in the wire
8	WHT	Under all conditions	Check for voltage to ground: There should be battery voltage.	Blown No. 16 (30 A) fuse in the under-hood fuse/relay box Blown No. 22 (20 A) fuse in the under-dash fuse/relay box An open in the wire
16	YEL	Ignition switch ON (II)	Check for voltage to ground: There should be battery voltage.	Blown No. 6 (7.5 A) fuse in the under-dash fuse/relay box An open in the wire
1	BLU	Combination switch OFF	Check for voltage to ground: There should be battery voltage.	Blown No. 16 (30 A) fuse in the under-hood fuse/relay box Faulty taillight relay An open in the wire
10	YEL/RED	Driver's door lock knob in LOCK	Check for voltage to ground: There should be less than 1 V.	Poor ground (G401, G402) Faulty driver's door lock actuator (knob switch) An open in the wire
10	YEL/RED	Driver's door lock knob in UNLOCK	Check for voltage to ground: There should be about 5 V or more.	Faulty driver's door lock actuator (knob switch) Short to ground in the wire
11	WHT/GRN	Driver's door lock switch in UNLOCK	Check for voltage to ground: There should be less than 1 V.	Poor ground (G401, G402, G601) Faulty driver's door lock switch Faulty hatch key cylinder switch An open in the wire
		Hatch key cylinder switch in UNLOCK	Check for voltage to ground: There should be less than 1 V.
		Driver's door lock switch in neutral	Check for voltage to ground: There should be about 5 V or more.	Faulty driver's door lock switch Faulty hatch key cylinder switch Short to ground in the wire
		Hatch key cylinder switch in LOCK
12	WHT/BLU	Driver's door lock switch in LOCK	Check for voltage to ground: There should be less than 1 V.	Poor ground (G401, G402, G601) Faulty driver's door lock switch Faulty hatch key cylinder switch An open in the wire
		Hatch key cylinder switch in LOCK	Check for voltage to ground: There should be less than 1 V.
		Driver's door lock switch in neutral	Check for voltage to ground: There should be about 5 V or more.	Faulty driver's door lock switch Faulty hatch key cylinder switch Short to ground in the wire
		Hatch key cylinder switch in UNLOCK
13	BLU/RED	Ignition key is in the ignition switch	Check for voltage to ground: There should be less than 1 V.	Poor ground (G401,G402) Faulty ignition key switch An open in the wire
13	BLU/RED	Ignition key removed from the ignition switch	Check for voltage to ground: There should be about 5 V or more.	Faulty ignition key switch Short to ground in the wire
14	LTGRN/RED	Door(s) or hatch open	Check for voltage to ground: There should be less than 1 V.	Poor ground (G601) Faulty door switch Faulty hatch latch switch An open in the wire
14	LTGRN/RED	Door(s) or hatch closed	Check for voltage to ground: There should be about 5 V or more.	Faulty door switch Faulty hatch latch switch Short to ground in the wire