RM38T0EC _59 Vehicle Exterior _113746 DOOR / HATCH _0504731 POWER BACK DOOR SYSTEM J

DOOR / HATCH  POWER BACK DOOR SYSTEM  Power Back Door Warning System does not Operate  


DESCRIPTION

When the power back door warning system does not operate, one of the following may be malfunctioning:

1) wireless door lock control system, 2) power back door warning buzzer circuit, 3) multiplex networkdoor ECU.

WIRING DIAGRAM

E410647E10
0.073,2.583 2.365,2.781 2.292,0.198 10 false Combination Meter Assembly 0.896,3.406 3.188,3.604 2.292,0.198 10 false : CAN Communication Line 4.333,0.594 4.646,0.792 0.313,0.198 10 false 16 4.583,0.604 4.979,0.802 0.396,0.198 10 false BZR+ 5.354,1.354 5.75,1.552 0.396,0.198 10 false CPU 2.583,0.583 2.979,0.781 0.396,0.198 10 false BZR+ 1.688,0.604 2.083,0.802 0.396,0.198 10 false BZR- 1.469,1.25 1.865,1.448 0.396,0.198 10 false U23 1.469,1.406 3.917,1.604 2.448,0.198 10 false Power Back Door Warning Buzzer 2.323,2.604 3.938,2.979 1.615,0.375 10 false Main Body ECU (Multiplex Network Body ECU) 4.563,3.073 6.344,3.385 1.781,0.313 10 false Multiplex Network Door ECU 4.573,2.896 4.969,3.094 0.396,0.198 10 false U22 3.052,0.583 3.208,0.781 0.156,0.198 10 false 1 1.427,0.583 1.583,0.781 0.156,0.198 10 false 2

CAUTION / NOTICE / HINT

NOTICE:
·

If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>INITIALIZATION

·

The power back door warning function can be customized. Make sure the function is ON.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>CUSTOMIZE PARAMETERS

·

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.



PROCEDURE

1.CHECK OPERATION
a.

Check power back door system operation.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>OPERATION CHECK


Result:
Result Proceed to
Hazard warning light does not come on A
Power back door warning buzzer does not operate B



A

2.CHECK WIRELESS DOOR LOCK CONTROL SYSTEM (HAZARD ANSWER-BACK FUNCTION)

B

6.PERFORM ACTIVE TEST USING GTS
3.REPLACE MULTIPLEX NETWORK DOOR ECU
a.

Temporarily replace the multiplex network door ECU with a new or normally functioning one.

Click hereVehicle Exterior>DOOR / HATCH>BACK DOOR CLOSER ECU>REMOVAL


Result:
Proceed to
NEXT



NEXT

4.INITIALIZE MULTIPLEX NETWORK DOOR ECU
4.INITIALIZE MULTIPLEX NETWORK DOOR ECU
a.

Perform the initialization for the multiplex network door ECU.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>INITIALIZATION


Result:
Proceed to
NEXT



NEXT

5.CHECK POWER BACK DOOR SYSTEM
5.CHECK POWER BACK DOOR SYSTEM
a.

Check that the power back door hazard warning lights operate normally.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>OPERATION CHECK

OK:

The power back door hazard warning lights operate normally.



Result:
Proceed to
OK
NG



OK

END (MULTIPLEX NETWORK DOOR ECU WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


6.PERFORM ACTIVE TEST USING GTS
a.

Perform the Active Test according to the display on the GTS.

Body Electrical > Back Door > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
PBD Buzzer (Small Volume) Power back door warning buzzer sound (small volume) Start -
PBD Buzzer (Middle Volume) Power back door warning buzzer sound (Middle volume) Start -
PBD Buzzer (Large Volume) Power back door warning buzzer sound (Large volume) Start -
Body Electrical > Back Door > Active Test
Tester Display
PBD Buzzer (Small Volume)
50004 489 42003
Body Electrical > Back Door > Active Test
Tester Display
PBD Buzzer (Middle Volume)
50004 489 42007
Body Electrical > Back Door > Active Test
Tester Display
PBD Buzzer (Large Volume)
50004 489 42008
OK:

Power back door warning buzzer sounds.



Result:
Proceed to
OK
NG



OK

REPLACE MULTIPLEX NETWORK DOOR ECU

Click hereVehicle Exterior>DOOR / HATCH>BACK DOOR CLOSER ECU>REMOVAL


NG

7.CHECK HARNESS AND CONNECTOR (POWER BACK DOOR WARNING BUZZER - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)
7.CHECK HARNESS AND CONNECTOR (POWER BACK DOOR WARNING BUZZER - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)
a.

Disconnect the U23 power back door warning buzzer connector.


b.

Disconnect the U22 multiplex network door ECU connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
U23-1 (BZR+) - U22-16 (BZR+) Always Below 1 Ω
U23-2 (BZR-) - Body ground Always Below 1 Ω
U23-1 (BZR+) or U22-16 (BZR+) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

8.REPLACE POWER BACK DOOR WARNING BUZZER

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.REPLACE POWER BACK DOOR WARNING BUZZER
a.

Temporarily replace the power back door warning buzzer with a new or normally functioning one.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR WARNING BUZZER>REMOVAL


Result:
Proceed to
NEXT



NEXT

9.CHECK POWER BACK DOOR SYSTEM
9.CHECK POWER BACK DOOR SYSTEM
a.

Check that the power back door warning buzzer operates normally.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>OPERATION CHECK

OK:

Power back door warning buzzer sounds.



Result:
Proceed to
OK
NG



OK

END (POWER BACK DOOR WARNING BUZZER WAS DEFECTIVE)

NG

REPLACE MULTIPLEX NETWORK DOOR ECU

Click hereVehicle Exterior>DOOR / HATCH>BACK DOOR CLOSER ECU>REMOVAL