DOOR LOCK POWER DOOR LOCK CONTROL SYSTEM All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

DESCRIPTION

The main body ECU (multiplex network body ECU) receives driver door key cylinder lock or unlock switch signals from the front door lock with motor assembly. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

0.5,1.719 0.958,1.917 0.458,0.198 10 false E37 0.49,1.885 3.448,2.25 2.958,0.365 10 false Main Body ECU (Multiplex Network Body ECU) 1.74,0.833 2.198,1.031 0.458,0.198 10 false L2 1.646,1.344 2.104,1.542 0.458,0.198 10 false UL3 1.979,0.729 2.438,0.927 0.458,0.198 10 false 28 1.99,1.24 2.448,1.438 0.458,0.198 10 false 4 4.875,0.74 5.656,0.917 0.781,0.177 10 false 9 4.823,1.24 5.656,1.427 0.833,0.188 10 false 10 5.094,0.74 5.552,0.938 0.458,0.198 10 false L 5.083,1.25 5.542,1.448 0.458,0.198 10 false UL 6.094,0.99 6.552,1.188 0.458,0.198 10 false E 6.292,0.99 6.885,1.208 0.594,0.219 10 false 7 4.49,1.667 4.917,1.927 0.427,0.26 10 false G12 4.49,1.833 7.094,2.052 2.604,0.219 10 false Front Door Lock with Motor Assembly LH

CAUTION / NOTICE / HINT

NOTICE:: ·

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

·

The auxiliary battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

Click hereVehicle Interior>DOOR LOCK>POWER DOOR LOCK CONTROL SYSTEM>ON-VEHICLE INSPECTION202111,999999,_58,_111830,_0505351,RM100000001ZMT7,

*: w/ Door Control Battery

PROCEDURE

1.READ VALUE USING GTS (DOOR KEY SW-LOCK, D DOOR KEY SW-UL)

a.

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Door Lock Switch Status by a Mechanical Key (D/P Door)	Driver door key-linked lock / unlock switch lock signal	OFF or ON	OFF: Driver door key cylinder not turned to lock position ON: Driver door key cylinder turned to lock position	-
Door Unlock Switch Status by a Mechanical Key (D Door)	Driver door key-linked lock / unlock switch unlock signal	OFF or ON	OFF: Driver door key cylinder not turned to unlock position ON: Driver door key cylinder turned to unlock position	-

Body Electrical > Main Body > Data List

Tester Display
Door Lock Switch Status by a Mechanical Key (D/P Door)
Door Unlock Switch Status by a Mechanical Key (D Door)

50003 449 11,14

Result:

Proceed to
OK
NG

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

NG

2.INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

Click hereVehicle Interior>DOOR LOCK>FRONT DOOR LOCK>INSPECTION202111,999999,_58,_111830,_0501507,RM100000001Z6GP,

Result:

Proceed to
OK
NG

OK

3.CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

Click hereVehicle Interior>DOOR LOCK>FRONT DOOR LOCK>REMOVAL202111,202203,_58,_111830,_0501507,RM100000001Z6GN,202203,202303,_58,_111830,_0501507,RM1000000022PBT,202303,202406,_58,_111830,_0501507,RM100000002AMDX,202406,999999,_58,_111830,_0501507,RM100000002MT7F,

3.CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

a.

Disconnect the E37 main body ECU (multiplex network body ECU) connector.

b.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(G12,E37)Location & Routingewd_type=routing;type=c,c;code=G12,E37 Click Connector(G12)Body>Front Door Wire RH / Front Door Wire LH>Front Door Lock with Motor Assembly LHewd_type=component;type=c;code=G12;pinno=9,10,7 Click Connector(E37)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E37;pinno=28,4
G12-9 (L) - E37-28 (L2)	Always	Below 1 Ω
G12-10 (UL) - E37-4 (UL3)	Always	Below 1 Ω
G12-7 (E) - Body ground	Always	Below 1 Ω
G12-9 (L) or E37-28 (L2) - Other terminals and body ground	Always	10 kΩ or higher
G12-10 (UL) or E37-4 (UL3) - Other terminals and body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR