Communication Diagnosis Procedure

COMMUNICATION DIAGNOSIS

Check the communication between BCM and each local control unit (LCU).




Operation Procedure

Diagnosis Result Display
- The indicator lamps (the map lamp and step lamp) turn ON (illuminate) for 2 seconds and OFF (go off) for 2 seconds to indicate that the diagnosis has started, then indicate the diagnosis trouble code.
- To indicate the diagnosis trouble code, the indicator lamps illuminate or flash.
- At first, the lamps indicate the second place by ON/OFF with 0.5 second-interval, then OFF for 1.5 seconds. Next, they indicate the first place by ON/OFF with 0.5 second interval.
- If there are multiple malfunctioning parts, the lamps indicate them in sequence from the smallest diagnosis trouble code.
- The diagnosis results repeat until the diagnosis is cancelled.
- If a malfunction is indicated, carry out the communication diagnosis again to check that the same diagnosis trouble code is indicated.




Diagnosis Trouble Code Indication Example

Cancel Of Communication Diagnosis
If one of the following conditions is satisfied, the communication diagnosis is cancelled.
- When the ignition switch is turned OFF.
- The vehicle speed becomes 7 km/h (4 MPH) or higher.
- Ten minutes have passed since the diagnostic result indication start without no diagnosis cancel operation.