Control Unit Input Test

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before testing, do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ) to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line is OK.
Before doing the input tests, make sure the No. C11 (7.5 A) fuse in the driver's under-dash fuse/relay box is OK.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in 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, P, and Q.
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.
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 7.

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 An open or high resistance in the wire
H1	BRN	In all ignition switch positions	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
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
Q4	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 (G402) or an open in the ground wire An open or high resistance in the wire
Q4	PNK	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
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
P17 . P13	PNK . BLK	Combination light switch OFF	Check for continuity between terminals P13 and P17: There should be continuity.	Faulty combination light switch An open or high resistance in the wire
P17 . P13	PNK . BLK	Combination light switch in any other position than OFF	Check for continuity between terminals P13 and P17: There should be no continuity.	Faulty combination light switch A short to ground in the wire
P19 . P13	GRY . BLK	Combination light switch (PARKING position or headlight) ON	Check for continuity between terminals P13 and P19: There should be continuity.	Faulty combination light switch An open or high resistance in the wire
P19 . P13	GRY . BLK	Combination light switch OFF	Check for continuity between terminals P13 and P19: There should be no continuity.	Faulty combination light switch A short to ground in the wire
P15 . P13	BRN . BLK	Combination light switch (headlight) ON	Check for continuity between terminals P13 and P15: There should be continuity.	Faulty combination light switch An open or high resistance in the wire
P15 . P13	BRN . BLK	Combination light switch OFF	Check for continuity between terminals P13 and P15: There should be no continuity.	Faulty combination light 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 11.

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 12.

CONTROL UNIT INPUT TEST RESULT - REAR MICU (WITH POWER TAIL GATE)

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

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 - REAR MICU (WITHOUT POWER TAIL GATE)

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
An open or high resistance in the wire

BLK

In all ignition switch positions

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

Poor ground (G801)
An open or high resistance in the ground wire

A29

BLK

In all ignition switch positions

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

Poor ground (G801)
An open or high resistance in the ground wire

B16

BLK

In all ignition switch positions

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

Poor ground (G602)
An open or high resistance in the ground wire

B26

BLK

In all ignition switch positions

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

Poor ground (G602)
An open or high resistance in the ground 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

Check for continuity to ground:
There should be no continuity.

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

Check for continuity to ground:
There should be no continuity.

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

Check for continuity to ground:
There should be no continuity.

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: Gauge Control Module Connector Terminals Identification
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 16.

Reconnect the connector to the gauge control module, 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 the input tests prove OK, go to step 17.

CONTROL UNIT INPUT TEST RESULT - GAUGE CONTROL MODULE

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
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
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
28	YEL	Parking brake pedal pressed	Measure the voltage to ground: There should be less than 0.2 V.	Faulty parking brake switch An open or high resistance in the wire
28	YEL	Parking brake pedal released	Check for continuity to ground: There should be no continuity.	Faulty parking brake switch A short to ground in the wire

Do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ), and check the beeper and the seat belt reminder indicator.
- If the beeper sounds and the seat belt reminder indicator flashes, go to step 17.
- If the beeper does not sound or the seat belt reminder indicator does not flash, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
Substitute a known-good gauge control module, and recheck the system.
- If the symptom is gone, the gauge control module is faulty; replace it.
- If the symptom is still present, the MICU is faulty; replace the driver's under-dash fuse/relay box.
  - USA models (see DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL AND INSTALLATION )
  - Canada models (see CANADA MODELS )