Mode 2

WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

Description:

Mode 2 is an easy way to identify a problem circuit with out having to test the circuit with a DVOM. Mode 2 will confirm a switch/circuit is working by flashing the ignition key light and sounding the beeper as the circuit is used. The multiplex control system will confirm inputs as they are grounded except for the following circuits:

Turning the intermittent wiper ring (several confirmations as ring is turned).
Turning the dash light illumination dimmer (several confirmations as the knob is turned).
The Audio unit, Navigation display, RES display, DVD player (confirmation as any one component is disconnected).

To Enter Mode 2:

From Mode 1, disconnect the special tool from the multiplex control (MPCS) inspection connector for between 5 and 10 seconds, then reconnect it. The ignition key light should come on and the beeper should beep for 2 seconds, then blink/beep twice more at 0.2 second intervals. This indicates the system has entered Mode 2.
Mode 2: Ignition Key Light and Beeper

Fig 1: Blinking Pattern - Ignition Key Light And Beeper
Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE: To cancel Mode 2, disconnect the special tool from the multiplex control inspection connector for more than 10 seconds or turn the ignition switch OFF.

Operate the switches as described in the charts below.

NOTE:

A second key is necessary to test the key cylinder switches. If only one key is available, cut a second key from a non-immobilizer type key blank for the test.
When testing the door lock knob switches, make sure all three passenger doors are locked. After unlocking the door, make sure to return the door lock knob switch to the lock position, otherwise the test results will be inaccurate.

REFERENCE CHART

Passenger's Multiplex Control Unit
First start with the front passenger's door lock knob switch in the lock position Right rear door lock knob switch (UNLOCK) Front Passenger's key cylinder switch (UNLOCK) Front Passenger's door lock switch (LOCK/UNLOCK) Front Passenger's door switch (OPEN) Right rear door switch (OPEN) Rear window wiper switch (WASHER/WIPER/INT) Tailgate key cylinder (LOCK/UNLOCK) Security input for the radio, navigation system or, DVD player, or rear controller and screen. Test by disconnecting and reconnecting the radio, navigation system or, DVD player, or rear controller and screen connector.

Passenger's Multiplex Control Unit

First start with the front passenger's door lock knob switch in the lock position
Right rear door lock knob switch (UNLOCK)
Front Passenger's key cylinder switch (UNLOCK)
Front Passenger's door lock switch (LOCK/UNLOCK)
Front Passenger's door switch (OPEN)
Right rear door switch (OPEN)
Rear window wiper switch (WASHER/WIPER/INT)
Tailgate key cylinder (LOCK/UNLOCK)
Security input for the radio, navigation system or, DVD player, or rear controller and screen.
Test by disconnecting and reconnecting the radio, navigation system or, DVD player, or rear controller and screen connector.

REFERENCE CHART (DRIVER'S MULTIPLEX CONTROL UNIT)

Driver's Multiplex Control Unit
Dash lights brightness controller (ROTATE) Driver's door switch (OPEN) Left rear door switch (OPEN) Left rear door lock knob switch (UNLOCK) Tailgate latch switch (OPEN) Driver's seat belt switch (UNBUCKLED) Windshield wiper/washer switch (except MIST switch) Brake pedal position switch (Brake switch) (PRESSED) Parking brake switch (ON) Hood switch (OPEN) Headlight or combination switch (ON)

REFERENCE CHART (DOOR MULTIPLEX CONTROL UNIT)

Door Multiplex Control Unit
Driver's door lock knob switch (LOCK/UNLOCK) Driver's key cylinder switch (LOCK/UNLOCK) Driver's door lock switch (LOCK/UNLOCK) Driver's key cylinder switch (UNLOCK) Power window master switch (the passenger's switches) (UP/DOWN)

Did the multiplex control system confirm all the circuits by flashing the ignition key light and sounding the beeper?

YES - The multiplex system is OK, if the symptom is still present, go to the input test for the system with the problem (see chart below), or refer to Multiplex Control Unit Input Test (see MULTIPLEX CONTROL UNIT INPUT TEST ).

SYSTEM REFERENCE CHART

System
Power door locks (see CONTROL UNIT INPUT TEST )
Security (see CONTROL UNIT INPUT TEST )
Keyless (see CONTROL UNIT INPUT TEST )
Power windows (Includes key-off timer operation) (see CONTROL UNIT INPUT TEST )
Entry light control, Key light timer (see CONTROL CIRCUIT INPUT TEST )
Wiper controls (front and rear) (see CONTROL UNIT INPUT TEST )
Automatic lights off (see AUTO-OFF HEADLIGHTS CONTROL UNIT INPUT TEST )
Reminder chimes (Key-in, seat belt, lights-on) (see CONTROL UNIT INPUT TEST )
Low oil pressure indicator (see CONTROL UNIT INPUT TEST )

NO - Find the open or short in the circuit that was not confirmed by the multiplex control system. If the circuit is OK, replace the multiplex control unit that monitors the circuit.