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 ).

MICU

Turn the ignition switch to LOCK (0).
Remove the driver's kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
Disconnect driver's under dash fuse/relay box connectors E, F, G, H, and P.
NOTE: All connector views are wire side of female terminals.

Fig 1: Identifying Driver's Under Dash Fuse/Relay Box Connectors
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 6.

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.

CONTROL UNIT INPUT TEST RESULT

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
H1	BRN	Under all conditions	Check for continuity to ground: There should be continuity.	Poor ground (G402) An open or high resistance in the ground wire

Reconnect the connectors to the driver's under-dash fuse/relay box.

Turn the ignition switch to ON (II), 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 8.

CONTROL UNIT INPUT TEST RESULT

Cavity	Wire	Test condition	Test: Desired result	Possible cause if result is not obtained
F24	WHT	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. B16 (10 A) fuse in the under hood fuse/relay box Faulty under hood fuse/relay box An open or high resistance in the wire
G5	BLK	In all ignition switch positions	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
P2	BLK	In all ignition switch positions	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
E22	LT BLU	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
E22	LT BLU	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
G3	LT 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
G3	LT GRN	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

Rear MICU

Turn the ignition switch to LOCK (0).
Remove the left rear side trim panel (see TRIM REMOVAL/INSTALLATION - REAR SIDE AREA ).
Disconnect rear fuse box connectors A and B.
NOTE: All connector views are wire side of female terminals.

Fig 2: Identifying Rear Fuse Box Connectors
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.

CONTROL UNIT INPUT TEST RESULT

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not obtained

A9⁽¹⁾

PNK

Power tailgate closer unit connector B (6P) disconnected

Check for continuity between terminal A9 and power tailgate closer unit connector B (6P) terminal No. 5: There should be continuity.

An open or high resistance in the wire

⁽¹⁾	With power tailgate

Reconnect the connectors to the rear fuse 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.

CONTROL UNIT INPUT TEST RESULT

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result is not obtained

WHT

Ignition switch ON (II)

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

Blown No. B16 (10 A) fuse in the under hood fuse/relay box
Faulty under hood fuse/relay box
An open or high resistance in the wire

B29

GRY

Ignition switch ON (II)

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

Blown No. C10 (15 A) fuse in the driver's under dash fuse/relay box
Faulty under hood fuse/relay box
An open or high resistance in the wire

A9⁽¹⁾

PNK

Tailgate open

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

Faulty full latch switch
Poor ground (G801) or an open in the ground wire
An open or high resistance in the wire

Tailgate closed

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

Faulty full latch switch
A short to ground in the wire

B11

GRN

Right sliding door open

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

Faulty right sliding door switch
Faulty right sliding door switch ground
An open or high resistance in the wire

Right sliding door closed

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

Faulty right sliding door switch
A short to ground in the wire

B12

ORN

Left sliding door open

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

Faulty left sliding door switch
Faulty left sliding door switch ground
An open or high resistance in the wire

Left sliding door closed

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

Faulty left sliding door switch
A short to ground in the wire

⁽¹⁾	Without power tailgate

Gauge Control Module

Turn the ignition switch to LOCK (0).
Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), and disconnect the 32P connector from it.

Fig 3: Identifying Gauge Control Module 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 17.

Reconnect the 32P connector to the gauge control module, 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 18.

CONTROL UNIT INPUT TEST RESULT

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
4	BLK	In all ignition switch positions	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
1	GRN	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. B16 (10 A) fuse in the under hood fuse/relay box An open or high resistance in the wire
17	GRN	Ignition switch ON (II)	Measure the voltage to ground: There should be battery voltage.	Blown No. C11 (7.5 A) fuse in the driver's under dash fuse/relay box An open or high resistance in the wire

If the multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the MICU).
- USA models (see USA MODELS ).
- Canada models (see CANADA MODELS ).