RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0386642 IMMOBILISER SYSTEM C

THEFT DETERRENT / KEYLESS ENTRY IMMOBILISER SYSTEM B2796 No Communication in Immobiliser System B2798 Communication Malfunction No. 2

DESCRIPTION

This DTC is stored when a door control transmitter assembly is inserted into the ignition key cylinder but no communication occurs between the door control transmitter assembly and transponder key ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2796	No Communication in Immobiliser System	The key ID code cannot be transmitted to the transponder key ECU assembly (1 trip detection logic*).	· Wire harness or connector · Door control transmitter assembly	DTC Output Confirmation Operation: Insert the door control transmitter assembly into the ignition key cylinder.
B2798	Communication Malfunction No. 2	Key ID code identification cannot be completed within the specified time (1 trip detection logic*).	· Wire harness or connector · Door control transmitter assembly	DTC Output Confirmation Operation: Insert the door control transmitter assembly into the ignition key cylinder.

*: Only output while a malfunction is present.

Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected	Fail-safe Operation when Malfunction Detected
Engine cannot be started	-

Related Data List and Active Test
DTC No.	Data List and Active Test
B2796	-
B2798	-

WIRING DIAGRAM

4.052,0.969 4.667,1.167 0.615,0.198 10 false ANT1 4.063,1.885 4.677,2.083 0.615,0.198 10 false ANT2 3.802,0.969 4.417,1.167 0.615,0.198 10 false 2 3.802,1.875 4.417,2.073 0.615,0.198 10 false 3 1.49,0.969 2.104,1.167 0.615,0.198 10 false ANT1 1.469,1.885 2.083,2.083 0.615,0.198 10 false ANT2 0.667,2.479 1.281,2.677 0.615,0.198 10 false N65 0.667,2.615 2.469,2.833 1.802,0.219 10 false Transponder Key Coil 6.031,1.385 6.646,1.583 0.615,0.198 10 false IC 6.083,0.406 6.698,0.604 0.615,0.198 10 false 5 V 4.24,3.01 4.854,3.208 0.615,0.198 10 false N66 4.229,3.167 6.896,3.365 2.667,0.198 10 false Transponder Key ECU Assembly 2,0.979 2.615,1.177 0.615,0.198 10 false 1 2.01,1.906 2.625,2.104 0.615,0.198 10 false 5

CAUTION / NOTICE / HINT

NOTICE:: ·

Before replacing the door control transmitter assembly, refer to the Service Bulletin.

·

After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL)

Disconnect the N66 transponder key ECU assembly connector.

Disconnect the N65 transponder key coil connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
N66-2 (ANT1) - N65-1 (ANT1)	Always	Below 1 Ω
N66-3 (ANT2) - N65-5 (ANT2)	Always	Below 1 Ω
N66-2 (ANT1) or N65-1 (ANT1) - Other terminals and body ground	Always	10 kΩ or higher
N66-3 (ANT2) or N65-5 (ANT2) - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR