RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0586355 THEFT DETERRENT SYSTEM(for NR Series Engine) J

THEFT DETERRENT / KEYLESS ENTRY  THEFT DETERRENT SYSTEM(for NR Series Engine)  Power Source Circuit  


DESCRIPTION

Based on changes in the power source voltage, the main body ECU (multiplex network body ECU) can detect if the battery has been disconnected and reconnected.

WIRING DIAGRAM

B518828E10
1.313,0.875 3.146,1.073 1.833,0.198 10 false from Battery 4.156,1.01 5.99,1.208 1.833,0.198 10 false ECU-DCC NO. 2 3.771,1.667 5.417,2.135 1.646,0.469 10 false Driver Side Junction Block Assembly 3.76,1.51 5.594,1.708 1.833,0.198 10 false 4B 3.469,0.75 5.302,0.948 1.833,0.198 10 false 1 5.469,2 7.104,2.458 1.635,0.458 10 false Main Body ECU (Multiplex Network Body ECU) 5.469,1.833 5.948,2.01 0.479,0.177 10 false MB 5.385,0.74 5.698,0.938 0.313,0.198 10 false 31 5.646,0.854 6.26,1.052 0.615,0.198 10 false BECU

CAUTION / NOTICE / HINT

NOTICE:
·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

·

Inspect the fuses for circuits related to this system before performing the following procedure.



PROCEDURE

1.CHECK HARNESS AND CONNECTOR (POWER SUPPLY)
a.

Disconnect the 4B driver side junction block assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4B-1 - Body ground Always 8.5 V or higher



Result:
Proceed to
OK
NG



OK

2.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
a.

Remove the main body ECU (multiplex network body ECU).

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL

B438179C06
1.531,0.688 1.948,0.948 0.417,0.26 4.896,0.771 5.313,1.031 0.417,0.26 6.458,2.073 6.646,2.073 6.646,2.073 6.646,1.604 false 1.656,0.719 1.969,0.917 0.313,0.198 10 false 4B 5,0.802 5.313,1 0.313,0.198 10 false MB 6.042,1.99 6.615,2.208 0.573,0.219 10 false BECU 0.188,0.177 0.531,0.469 0.344,0.292 10 false *a
*a Component without harness connected
(Driver Side Junction Block Assembly) 		- -



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4B-1 - MB-31 (BECU) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL