Control Unit Input Test

NOTE: Before testing, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ), and make sure the lighting system works properly.

Driver's MICU

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
Disconnect driver's under-dash fuse/relay box connectors D, F, G, N, P, Q, and R.
NOTE: All connector views are wire side of female terminals.

Fig 1: Identifying Driver'S Under-Dash Fuse/Relay Box Connectors D, F, G, N, P, Q, And R Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.

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 6.

NOTE: Before testing, make sure the No. 25 (15 A) fuse in the driver's under-dash fuse/relay box is OK.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
F23	BLU	Under all conditions	Connect to ground with a jumper wire: The horns should sound.	Blown No. 10 (15 A) fuse in the under-hood fuse/relay box Faulty horn relay circuit Faulty horn An open or high resistance in the wire
D2	ORN	Connect battery power to terminal D2(or D9), and terminal D9(or D2) to body ground with jumper wires	Check actuator operation: The left rear door lock actuator should UNLOCK (or LOCK).	Faulty left rear door lock actuator An open or high resistance in the wire
D9	BLU
D5	PUR	Power tailgate closer unit connector B (6P) disconnected	Check for continuity between terminal D5 and power tailgate closer unit connector B (6P) terminal No. 2: There should be continuity.	An open or high resistance in the wire
N1	ORN	Connect battery power to terminal N1 (or N2), and terminal N2 (or N1) to body ground with jumper wires	Check actuator operation: The driver's door lock actuator should UNLOCK (or LOCK).	Faulty driver's door lock actuator An open or high resistance in the wire
N2	BLU
N1	ORN	Connect battery power to terminal N1 (or D9), and terminal D9 (or N1) to body ground with jumper wires	Check actuator operation: The fuel fill door lock actuator should UNLOCK (or LOCK).	Faulty fuel fill door lock actuator An open or high resistance in the wire
D9	BLU

Reconnect the connectors to the driver's under-dash fuse/relay box, and do the following input tests:

Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

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 8.

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not obtained

F18

YEL

Under all conditions

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

Blown No. 3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box
An open or high resistance in the wire

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
An open or high resistance in the wire

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(G601)
An open or high resistance in the ground wire

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(G401)
An open or high resistance in the ground wire

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(G402)
An open or high resistance in the ground wire

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(G402)
An open or high resistance in the ground wire

ORN

In all ignition switch positions or 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

LT GRN

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

D12

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

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

D15

PNK

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 (G603) 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

GRN

Hood open

Measure the voltage to ground: There should be less than 0.2 V.

Faulty security hood switch
Poor ground (G303) or an open in the ground wire
An open or high resistance in the wire

Hood closed

Measure the voltage to ground: There should be about 5 V.

Faulty security hood switch
A short to ground in the wire

Q18⁽¹⁾

PNK

Remote key inserted into the remote slot

Measure the voltage to ground: There should be less than 0.2 V.

Faulty remote slot
Faulty power control unit
Poor ground (G401) or an open in the ground wire
An open or high resistance in the wire

Remote key removed from the remote slot

Measure the voltage to ground: There should be about 5 V.

Faulty remote slot
Faulty power control unit
A short to ground in the wire

Q18⁽²⁾

PNK

Ignition key inserted into the ignition switch

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 switch LOCK (0), and the ignition key removed from the ignition switch

Measure the voltage to ground: There should be about 5 V.

Faulty ignition key switch
A short to ground in the wire

⁽¹⁾	With keyless access system

⁽²⁾	Without keyless access system

Passenger's MICU

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the passenger's kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
Disconnect passenger's under-dash fuse/relay box connectors A, E, F, and H.
NOTE: All connector views are wire side of female terminals.

Fig 2: Identifying Passenger'S Under-Dash Fuse/Relay Box Connectors A, E, F, And H Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 12.

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 13.

NOTE: Before testing, make sure the No. 10 (10 A) fuse in the passenger's under-dash fuse/relay box is OK.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A20	BLU	Connect battery power to terminal A20 (or A38), and terminal A38(or A20) to body ground with jumper wires	Check actuator operation: The front passenger's door lock actuator should UNLOCK (or LOCK).	Faulty front passenger's door lock actuator An open or high resistance in the wire
A38	YEL
H27	YEL	Connect battery power to terminal H27(or H1), and terminal H1 (or H27) to body ground 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
H1	BLU

Reconnect the connectors to the passenger's under-dash fuse/relay box, and 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 14.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
F2	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 1-2 (AS F/B STD) (40 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
A14	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 An open or high resistance in the wire
A35	BRN	Ignition switch ON (II), or power mode ON	Measure the voltage to ground: There should be battery voltage.	Blown No. 12 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open or high resistance in the wire
A36	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 (G405) An open or high resistance in the ground wire
A37	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
E15	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(G203) An open or high resistance in the ground wire
E16	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(G203) An open or high resistance in the ground wire
H7	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(G652) An open or high resistance in the ground wire
H25	ORN	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
H25	ORN	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
H3	LT BLU	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
H3	LT BLU	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
H22	PNK	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 (G652) or an open in the ground wire An open or high resistance in the wire
H22	PNK	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

Door Multiplex Control Unit

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the driver's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
Disconnect the 37P connector from the power window master switch.

Fig 3: Identifying Power Window Master Switch 37P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 all the terminals look OK, go to step 18.
Reconnect the driver's door harness to driver's door subharness.

With the connector 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 test proves OK, go to step 20.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
27	GRY	Disconnect the front passenger's power window switch 37P connector and the panoramic glass roof control unit/motor 10P connector	Check for continuity between terminal No. 27 and front passenger's power window switch 37P connector terminal No. 29: There should be continuity.	An open in the UART wire
			Check for continuity between terminal No. 27 and panoramic glass roof control unit/motor 10P connector terminal No. 7: There should be continuity.	An open in the UART wire
			Check for continuity to ground: There should be no continuity.	A short to ground in the UART wire

Reconnect the 37P connector to the power window master switch, and 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 21.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
13	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 An open or high resistance in the wire
14	LT GRN	Ignition switch ON (II), or power mode ON	Measure the voltage to ground: There should be battery voltage.	Blown No. 16 (7.5 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open or high resistance in the wire
25	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 24 (20 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open or high resistance in the wire
32	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(G402) An open or high resistance in the ground wire
37	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 (G401) An open or high resistance in the ground wire
28	PNK	Driver's door key cylinder switch in LOCK	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) or an open in the ground wire Faulty driver's door key cylinder switch An open or high resistance in the wire
28	PNK	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
29	BRN	Driver's door key cylinder switch in UNLOCK	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door key cylinder switch Poor ground (G402) or an open in the ground wire An open or high resistance in the wire
29	BRN	Driver's door key cylinder switch in neutral or 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
30	YEL	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 (G402) or an open in the ground wire An open or high resistance in the wire
30	YEL	Driver's door lock knob switch in neutral or 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
31	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 (G402) or an open in the ground wire An open or high resistance in the wire
31	WHT	Driver's door lock knob switch in neutral or 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

Front Passenger's Power Window Switch

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the front passenger's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
Disconnect the 37P connector from the front passenger's power window switch.

Fig 4: Identifying Front Passenger'S Power Window Switch 37P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 25.

With the connector 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 test proves OK, go to step 26.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
29	GRY	Disconnect the power window master switch 37P connector and the panoramic glass roof control unit/motor 10P connector	Check for continuity between terminal No. 29 and power window master switch 37P connector terminal No. 27: There should be continuity.	An open in the UART wire
			Check for continuity between terminal No. 29 and panoramic glass roof control unit/motor 10P connector terminal No. 7: There should be continuity.	An open in the UART wire
			Check for continuity to ground: There should be no continuity.	A short to ground in the UART wire

Reconnect the front passenger's door harness to front passenger's door subharness.

Reconnect the 37P connector to the front passenger's power window switch, and 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 28.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
25	GRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. 13 (20 A) fuse in the passenger's under-dash fuse/relay box Faulty passenger's under-dash fuse/relay box An open or high resistance in the wire
37	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 (G405) An open or high resistance in the ground wire
34	PUR	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 (G405) or an open in the ground wire An open or high resistance in the wire
34	PUR	Front passenger's door lock knob switch in LOCK	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

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) (see DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL AND INSTALLATION ). If input failures are related to a particular control unit, replace the control unit.