To Enter Mode 2

1. From mode 1, disconnect the special tool from the multiplex control system (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.
   Fig 1: Identifying Mode 2: Ignition Key Light

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2. Operate the switch as described in the charts below.

Fig 2: Inputs Monitored By Door Multiplex Control Unit Chart

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Fig 3: Inputs Monitored By Driver's Multiplex Control Unit Chart

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Fig 4: Inputs Monitored By Passenger's Multiplex Control Unit Chart

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^* 1. The multiplex system should flash the ignition key light and sound the beeper each time when the key is turned to the LOCK or UNLOCK position, and should not flash/beep as the key is returned to the neutral position.

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

1. YES:  The multiplex system is OK. If the symptom is still present, go to the input test for the system with the problem (see these items), or refer to multiplex input test (see Multiplex Control Unit Input Test  ).
   • Power door locks (see CONTROL UNIT INPUT TEST )
   • Security (EX models) (see CONTROL UNIT INPUT TEST )
   • Keyless (EX models) (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 UNIT INPUT TEST )
   • Windshield wiper controls (front and rear) (see REAR WINDOW INTERMITTENT WIPER CONTROL UNIT INPUT TEST )
   • Automatic lights off (EX models) (see CONTROL UNIT INPUT TEST )
   • Reminder chimes (Key-in, seat belt, lights-on) (see CONTROL UNIT INPUT TEST )
   • Dash lights brightness control (see CONTROL UNIT INPUT TEST )
   • Engine oil pressure indicator (see CONTROL UNIT INPUT TEST )
2. 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.