|DTC Code||DTC Name|
|B2784||Antenna Coil Open / Short|
When an open or short circuit is detected in the transponder key amplifier coil built into the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is also stored as a past DTC.
|DTC Code||DTC Detection Condition||Trouble Area||DTC Output Confirmation Operation|
The transponder key amplifier coil built into the engine switch is open (see below) or shorted (determined by communication with certification ECU (smart key ECU assembly)) (1 trip detection logic*1).
||With the shift lever in P, the key is held near the engine switch and an engine start operation is performed by pressing and holding the engine switch when the key battery is depleted.|
*1: Only output while a malfunction is present.
|Vehicle Condition when Malfunction Detected||Fail-safe Operation when Malfunction Detected|
|Engine cannot be started when key battery is depleted by holding key near engine switch and pressing and holding engine switch with shift lever in P||-|
|DTC Code||Data List and Active Test|
When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry & Start (CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - ENGINE SWITCH)
Disconnect the B75 and B76 certification ECU (smart key ECU assembly) connectors.
Disconnect the I32 engine switch connector.
Measure the resistance according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR
REPLACE ENGINE SWITCH
Temporarily replace the engine switch with a new or known good one Click here.
Clear the DTCs Click here.
CHECK FOR DTC
Check for DTCs Click here.
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
|DTC B2784 is not output.|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)