Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)

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.

Test Mode 1

Check the PCM for DTCs and troubleshoot PCM (see GENERAL TROUBLESHOOTING INFORMATION ) or F-CAN loss of communication errors first, then do this diagnosis if the HDS is not available.

Check the No. B16 (10 A) fuse in the under-hood fuse/relay box and the No. C11 (7.5 A) fuse in the driver's under-dash fuse/relay box.
Are the fuses OK?

YES -Go to step 2.

NO -Find and repair the cause of the blown fuse(s).
Move the interior light switch to the DOOR position.
NOTE: Do steps 3 to 7 within 10 seconds.
Turn the ignition switch to ON (II).
Pull and hold the combination switch in its Passing position.

Fig 1: Timing Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.
While holding the switch, turn on the headlights, then release, pull, and hold the switch in its Passing position.
Turn off the headlights, then turn the headlights ON and OFF two times.
Release the combination switch.
Wait 5 seconds, and watch the individual map lights and ignition key light. When the lights flash quickly once and then go off, the system is in Test Mode 1.
Check for B-CAN DTCs indicated by the gauge control odo/trip display or multi-information display (MID) on the gauge control module while still in Test Mode 1. Press the SEL/RESET button to display the next code. After you get to the last code, the display shows END. If no DTCs are stored, the display reads NO (see HOW TO DISPLAY DTCS ON THE GAUGE CONTROL MODULE ).
NOTE: If the test times out, turn the ignition switch to LOCK (0), and repeat steps 3 to 7.

Are any DTCs indicated?

YES -Go to step 10.

NO -Go to step 13.
Record all DTCs and sort them by DTC type.
Troubleshoot the DTC(s) in this order:
- Battery voltage DTCs
- Internal error DTCs
- Loss of communication DTCs
- Signal error DTCs
Clear the DTCs by pressing and holding the SEL/RESET button for about 10 seconds.
You will hear a beep to confirm the codes have been cleared. Operate the devices that failed, and recheck for codes.
Test Mode 2
Pull and hold the combination switch in its Passing position.
NOTE: Do steps 14 to 18 within 10 seconds.

Fig 2: Timing Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.
While holding the switch, turn on the headlights, then release, pull, and hold the switch in its Passing position.
Turn off the headlights, then turn the headlights ON and OFF two times.
Release the combination switch.
Wait 5 seconds, and watch the individual map lights and ignition key light. When the lights flashes two times quickly and then goes off, the system is in Test Mode 2.
NOTE: If you repeat this procedure, the system automatically returns to Test Mode 1.

The following tables list the circuits that can be checked in Test Mode 2. Operate the switch that is most closely related to the problem. If the circuit is OK, the individual map lights, ceiling light, and ignition key light blink once. If the circuit is faulty, there is no indication.

MICU

MICU CIRCUITS

Brake pedal position switch (ON)	Turn signal switch (RIGHT)
Driver's door switch	Hazard warning switch (ON)
Front passenger's door switch	Headlight switch (ON)
Audio unit	Headlight switch (OFF)
Wiper switch (HI/LO)	Lighting switch (ON)
Wiper switch (INT/LO)	Dimmer switch (ON)
Wiper switch (MIST)	Passing switch (ON)
Washer switch	Fog light switch
Wiper intermittent dwell time controller	Transmission range switch (P)
Rear window wiper switch	Ignition key switch
Rear washer switch	Automatic lighting sensor/sunlight sensor
Turn signal switch (LEFT)

Relay Control Module

RELAY CONTROL MODULE CIRCUITS

Windshield washer switch

Security hood switch

A/C pressure switch

Door Multiplex Control Unit

DOOR MULTIPLEX CONTROL UNIT CIRCUITS

Driver's door lock switch (UNLOCK)

Driver's door lock switch (LOCK)

Driver's door lock knob switch (UNLOCK)

Driver's door lock knob switch (LOCK)

Driver's door key cylinder switch (UNLOCK)⁽¹⁾

Driver's door key cylinder switch (LOCK)⁽¹⁾

⁽¹⁾	A second key is necessary to check the key cylinder inputs. Be sure to rotate the key cylinder switch two times to each position (lock and lock, unlock and unlock) to ensure the door lock knob switch is in the appropriate position.

Front Passenger's Power Window Switch

FRONT PASSENGER'S POWER WINDOW SWITCH CIRCUITS

Front passenger's door lock switch (UNLOCK)

Front passenger's door lock switch (LOCK)

Front passenger's door lock knob switch (UNLOCK)

Rear MICU

REAR MICU CIRCUITS

Tailgate latch switch	Right sliding door lock knob switch (UNLOCK)
Left sliding door switch	Tailgate outer handle switch
Right sliding door switch	Fuel fill door switch
Left sliding door lock knob switch (LOCK/UNLOCK)	Rear window wiper motor park position (Auto stop)

Power Seat Control Unit

POWER SEAT CONTROL UNIT CIRCUITS

Transmission range switch (P)	Front UP-DOWN switch (Up)
Slide switch (Forward)	Front UP-DOWN switch (Down)
Slide switch (Backward)	Rear UP-DOWN switch (Up)
Recline switch (Forward)	Rear UP-DOWN switch (Down)
Recline switch (Backward)

Does the ceiling light work properly in all switch positions?

YES -Go to function and input test for the system related to the failure.

NO -Repair the open or short, or replace the faulty switch.