Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK VEHICLE TYPE

VEHICLE TYPE REFERENCE TABLE

Vehicle type	Proceed to
w/o Power back door system	A
w/ Power back door system	B

B: Go to step 4

A: Go to next step.

INSPECT BACK DOOR LOCK ASSEMBLY

Remove the back door lock assembly.

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

Standard resistance (Courtesy switch)

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Door Lock Latch Position	Specified Condition
1 - 2	Open-latch	Below 1 Ω
1 - 2	Half-latch	Below 1 Ω
1 - 2	Full-latch	10 kΩ or higher
1 - 2	Over-latch	10 kΩ or higher

Fig 1: Identifying Back Door Lock Operation

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BACK DOOR LOCK ASSEMBLY

OK: Go to next step.

CHECK WIRE HARNESS (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL J/B (BODY ECU))

Disconnect the back door lock assembly connector.
Disconnect the instrument panel J/B connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
B12-1 - B5-25 (BCTY)	Always	Below 1 Ω
B12-2 - Body ground	Always	Below 1 Ω

Fig 2: Identifying Back Door Lock Assembly & Instrument Panel J/B Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

READ VALUE OF DATA LIST

Check the DATA LIST to ensure proper function of the back door courtesy switch.

BACK DOOR:

BACK DOOR

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
COURTESY SW	Back door courtesy switch signal (built in power back door lock) /ON or OFF	ON: Driver side door is open OFF: Driver side door is closed	-

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

NG: Go to step 6

OK: Go to next step.

CHECK WIRE HARNESS (POWER BACK DOOR ECU - INSTRUMENT PANEL J/B)

Disconnect the power back door ECU connector.
Disconnect the instrument panel J/B connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
P13-19 (CTYO) - B5-25 (BCTY)	Always	Below 1 Ω

Fig 3: Identifying Power Back Door ECU & Instrument Panel J/B Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECT BACK DOOR LOCK ASSEMBLY

Remove the back door lock assembly.

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

Standard resistance (Courtesy switch)

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Door Lock Latch Position	Specified Condition
1 - 6	Open-latch	Below 1 Ω
1 - 6	Half-latch	Below 1 Ω
1 - 6	Full-latch	10 kΩ or higher
1 - 6	Over-latch	10 kΩ or higher

Fig 4: Identifying Back Door Lock Assembly Operation

NG: REPLACE BACK DOOR LOCK ASSEMBLY

OK: Go to next step.

CHECK WIRE HARNESS (BACK DOOR LOCK ASSEMBLY - POWER BACK DOOR ECU)

Disconnect the back door lock assembly connector.
Disconnect the power back door ECU connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
B11-1 - P13-7 (CTYE)	Always	Below 1 Ω
B11-6 - Body ground	Always	Below 1 Ω

Fig 5: Identifying Back Door Lock Assembly & Power Back Door ECU Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE