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

Special Tools Required

MPCS (MCIS) Service Connector 07WAZ-001010A

Test Mode 1

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

Check the No. 7 (10 A) and the No. 21 (7.5 A) fuses in the under-dash fuse/relay box.
Are the fuses OK?

YES -Go to step 2.

NO -Find and repair the cause of the blown fuse.
Remove the left kick panel TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
Turn the ignition switch to ON (II), and press the interior light control button (DOOR).
Connect the MPCS service connector (A) to the MICU service check connector socket (B) in the under-dash fuse/relay box.

Fig 1: Connecting MPCS Service Connector (A) To MICU Service Check Connector Socket (B)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Wait 5 seconds, and watch the individual map lights and ignition key light When they flash once quickly and then go off, the system is in Test Mode 1.
Check for B-CAN DTCs indicated by the 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 will read NO.
NOTE: If the test times out, remove the MPCS service connector, turn the ignition switch to LOCK (0), and repeat steps 3 and 4.

Are any DTCs indicated?

YES -Go to step 7.

NO -Go to step 11.
Record all DTCs and sort them into these categories:
- Battery voltage DTCs
- Internal error DTCs
- Loss of communication DTCs
- Signal error DTCs
Troubleshoot the DTCs in the order listed above.
Clear the DTCs by pressing and holding the SEL/RESET button for at least 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

Remove the MPCS service connector from the under-dash fuse/relay box MICU service check connector socket for 5-10 seconds, then re-insert it to enter Mode 2. When the system enters Mode 2, the individual map lights and ignition key light flash two times quickly and then go off.

NOTE: If the MPCS service connector is disconnected for too short or too long of a time, or the ignition switch is turned to LOCK (0), the system returns to Test Mode 1.

MICU

Item
Driver's door switch (ON; door opened)
Front passenger's door switch (ON; door opened)
Left rear door switch (ON; door opened)
Right rear door switch (ON; door opened) Automatic lighting sensor
Headlight washer switch (ON; switch pressed) Ignition key switch (ON; key inserted)
Brake pedal position switch (ON; pedal pressed)
Transmission range switch (P, R)
Audio security ground (when connected)
Power mirror selector switch (LEFT, RIGHT) Power mirror adjustment switch (LEFT, RIGHT, UP, DOWN)

RELAY CONTROL MODULE

Item
Windshield wiper switch (AUTO STOP/PARK)
Security hood switch (ON; hood opened)

COMBINATION SWITCH CONTROL UNIT

Item
Turn signal switch (LEFT)
Turn signal switch (RIGHT)
Combination light switch (ON; each position)
Dimmer switch (ON)
Passing switch (ON)
Windshield wiper switch (ON)
Intermittent wiper dwell timer
Windshield washer switch (ON)
Fog light switch (ON)
Rear window wiper switch (ON)
Rear window washer switch (ON)

REAR MICU

Item
Full latch switch (Built into the tailgate closer unit) (ON)

DRIVER'S MPCS UNIT

Item

Power window master switch (Driver's window UP)

Power window master switch (Driver's window DOWN)

Power window master switch (Driver's window AUTO UP)

Power window master switch (Driver's window AUTO DOWN)

Power window master switch (Front passenger's window UP)

Power window master switch (Front passenger's window DOWN)

Power window master switch (Front passenger's window AUTO UP)

Power window master switch (Front passenger's window AUTO DOWN)

Power window master switch (Left rear window UP)

Power window master switch (Left rear window DOWN)

Power window master switch (Right rear window UP)

Power window master switch (Right rear window DOWN)

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

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

Driver's door lock switch (LOCK)

Driver's door lock switch (UNLOCK)

Driver's door lock knob switch (LOCK)

Driving position memory switches (1, 2, memo)

Left rear power window switch (UP)

Left rear power window switch (DOWN)

Fuel fill door opener switch (ON)

⁽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.

GAUGE CONTROL MODULE

Item
Parking brake switch (ON; parking brake applied)
Distance switch (ON; switch pressed)
VSA OFF switch (ON; switch pressed)
CMBS OFF switch (ON; switch pressed)
Active damper system switch (ON; switch pressed)
Cruise control main SET/RESUME/CANCEL switch (ON; switch pressed)
Transmission range switch (P, R, N, D, S)
Dashlights brightness controller (+, -)
Multi - information switch (SEL/RESET, PREVIOUS, NEXT)

POWER SEAT CONTROL UNIT

Item
Transmission range switch (P)
Power seat slide switch (FORWARD, BACKWARD)
Power seat front up-down switch (UP, DOWN)
Power seat rear up-down switch (UP, DOWN)
Power seat recline switch (FORWARD, RECLINE)
Power tilt/telescopic steering switch (UP, DOWN, PUSH, PULL)

FRONT PASSENGER'S MPCS UNIT

Item
Front passenger's door lock switch (LOCK)
Front passenger's door lock switch (UNLOCK)
Front passenger's power window switch (UP, DOWN, AUTO)
Right rear power window switch (UP, DOWN)

Do the individual map lights and ignition key light indicate proper switch operation?

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

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