RM38N0EC _59 Vehicle Exterior _111831 DOOR / HATCH _0505274 POWER BACK DOOR SYSTEM J

DOOR / HATCH  POWER BACK DOOR SYSTEM  Power Back Door does not Operate Using Cabin Switch  


DESCRIPTION

The power back door control switch signal is sent to the multiplex network door ECU via CAN communication.

If the power back door does not operate when the power back door control switch is operated, there may be a malfunction in the power back door control switch circuit.

WIRING DIAGRAM

B556243E07
1.156,1.427 1.615,1.625 0.458,0.198 10 false E14 1.156,1.583 3.292,1.771 2.135,0.188 10 false Power Back Door Control Switch 0.771,2.354 4.438,2.552 3.667,0.198 10 false : CAN Communication Line 5.063,1.979 6.896,2.344 1.833,0.365 10 false Multiplex Network Door ECU 3.104,1.906 3.563,2.104 0.458,0.198 10 false E36 3.104,2.073 4.75,2.427 1.646,0.354 10 false Main Body ECU (Multiplex Network Body ECU) 3.677,1.063 4.354,1.281 0.677,0.219 10 false PBDS 3.406,0.938 3.865,1.135 0.458,0.198 10 false 21 1.302,0.938 1.76,1.135 0.458,0.198 10 false 2 2.917,0.938 3.375,1.135 0.458,0.198 10 false 5 1.521,0.948 1.979,1.146 0.458,0.198 10 false MSE 2.427,0.948 2.885,1.146 0.458,0.198 10 false MSW

CAUTION / NOTICE / HINT

NOTICE:
·

The power back door system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power back door system after confirming that the CAN communication system is functioning properly.

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING

·

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

·

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



PROCEDURE

1.READ VALUE USING GTS
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
Back Door Operation Switch (Instrument) Power back door control switch signal OFF or ON OFF: Power back door control switch off
ON: Power back door control switch on 		-
Body Electrical > Main Body > Data List
Tester Display
Back Door Operation Switch (Instrument)
50003 449 47
OK:

The display is as specified in the normal condition column.



Result:
Proceed to
OK
NG



OK

REPLACE MULTIPLEX NETWORK DOOR ECU

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


NG

2.INSPECT POWER BACK DOOR CONTROL SWITCH
2.INSPECT POWER BACK DOOR CONTROL SWITCH

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR CONTROL SWITCH>INSPECTION

Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (POWER BACK DOOR CONTROL SWITCH - MAIN BODY ECU (MULTIPLAX NETWORK BODY ECU) AND BODY GROUND)

NG

REPLACE POWER BACK DOOR CONTROL SWITCH

Click hereVehicle Exterior>DOOR / HATCH>POWER BACK DOOR CONTROL SWITCH>REMOVAL


3.CHECK HARNESS AND CONNECTOR (POWER BACK DOOR CONTROL SWITCH - MAIN BODY ECU (MULTIPLAX NETWORK BODY ECU) AND BODY GROUND)
a.

Disconnect the E36 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(E14,E36)Location & Routing

Click Connector(E14)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Power Back Door Control Switch

Click Connector(E36)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECU

E14-5 (MSW) - E36-21 (PBDS) Always Below 1 Ω
E14-2 (MSE) - Body ground Always Below 1 Ω
E14-5 (MSW) or E36-21 (PBDS) - 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>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR