POWER BACK DOOR SYSTEM - Door Control Switch Circuit

DESCRIPTION

The back door control switch only turns on while the switch is being pressed, and turns off when the back door control switch is released.

When the back door control switch is on, a power back door close request signal is input to the power back door unit assembly (power back door ECU) to close the back door.

WIRING DIAGRAM

Power Back Door System - Door Control Switch Circuit. DOOR / HATCH. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (PBD CLOSE SW)

Check the Data List for proper functioning of the back door control switch ().

Back Door
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
PBD Close SW	Back door control switch signal / ON or OFF	ON: Back door control switch on OFF: Back door control switch off	-

OK:
The display is as specified in the normal condition.

Go to step 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()

2.INSPECT BACK DOOR CONTROL SWITCH

Remove the back door control switch ().

Inspect the back door control switch ().

REPLACE BACK DOOR CONTROL SWITCH ()

OK

3.CHECK HARNESS AND CONNECTOR (BACK DOOR CONTROL SWITCH - POWER BACK DOOR UNIT ASSEMBLY [POWER BACK DOOR ECU] AND BODY GROUND)

Disconnect the S25 back door control switch connector.

Disconnect the L52 power back door unit assembly (power back door ECU) connector.

Measure the resistance of the wire harness side connectors.

Standard Resistance:
Tester Connection Condition Specified Condition
S25-3 (MSW) - L52-4 (DS1) Always Below 1 Ω
S25-4 (E) - Body ground Always Below 1 Ω
S25-3 (MSW) - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU) ()

Tester Connection	Condition	Specified Condition
S25-3 (MSW) - L52-4 (DS1)	Always	Below 1 Ω
S25-4 (E) - Body ground	Always	Below 1 Ω
S25-3 (MSW) - Body ground	Always	10 kΩ or higher