Toyota CH-R Service Manual: Door Unlock Detection Switch Circuit

Toyota CH-R Service Manual / Lighting (int) / Lighting System / Door Unlock Detection Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration*1.

Click here

*1: w/ Smart Key System

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Door Lock Pos	Front door RH unlock detection switch signal	LOCK or UNLOCK	LOCK: Front door RH locked UNLOCK: Front door RH unlocked	-
FL Door Lock Pos	Front door LH unlock detection switch signal	LOCK or UNLOCK	LOCK: Front door LH locked UNLOCK: Front door LH unlocked	-
RR-Door Lock Pos SW	Rear door RH and LH unlock detection switch signal	ON or OFF	ON: Rear door RH or LH unlocked OFF: Rear door RH and LH locked	-
RL-Door Lock Pos SW	Rear door RH and LH unlock detection switch signal	ON or OFF	ON: Rear door RH or LH unlocked OFF: Rear door RH and LH locked	-

Body Electrical > Main Body > Data List

Tester Display
FR Door Lock Pos
FL Door Lock Pos
RR-Door Lock Pos SW
RL-Door Lock Pos SW

Result	Proceed to
OK	A
"FL Door Lock Pos" is not normal	B
"FR Door Lock Pos" is not normal	C
Both "RL-Door Lock Pos SW" and "RR-Door Lock Pos SW" are not normal	D

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

GO TO STEP 5

GO TO STEP 8

2.	INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

(a) Remove the front door lock with motor assembly LH.

Click here

(b) Inspect the front door lock with motor assembly LH.

Click here

OK:

Front door lock with motor assembly LH is normal.

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

3.	CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

(a) Disconnect the 3D instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J4-8 (LSSR) - 3D-13	Always	Below 1 Ω
J4-8 (LSSR) or 3D-13 - Body ground	Always	10 kΩ or higher
J4-7 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

Component without harness connected

(Instrument Panel Junction Block Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
3D-13 - MB-19 (LSFL)	Always	Below 1 Ω

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

5.	INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH

(a) Remove the front door lock with motor assembly RH.

Click here

(b) Inspect the front door lock with motor assembly RH.

Click here

OK:

Front door lock with motor assembly RH is normal.

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH

6.	CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

(a) Disconnect the 3D instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I4-7 (LSSR) - 3D-12	Always	Below 1 Ω
I4-7 (LSSR) or 3D-12 - Body ground	Always	10 kΩ or higher
I4-8 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

Component without harness connected

(Instrument Panel Junction Block Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
3D-12 - MB-17 (LSFR)	Always	Below 1 Ω

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

8.	INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY LH

(a) Remove the rear door lock with motor assembly LH.

Click here

(b) Inspect the rear door lock with motor assembly LH.

Click here

OK:

Rear door lock with motor assembly LH is normal.

REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY LH

9.	CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK WITH MOTOR ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

(a) Disconnect the 3D instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
L1-5 (LSSR) - 3D-14	Always	Below 1 Ω
L1-5 (LSSR) or 3D-14 - Body ground	Always	10 kΩ or higher
L1-6 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY RH

(a) Remove the rear door lock with motor assembly RH.

Click here

(b) Inspect the rear door lock with motor assembly RH.

Click here

OK:

Rear door lock with motor assembly RH is normal.

REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY RH

11.	CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K1-9 (LSSR) - 3D-14	Always	Below 1 Ω
K1-9 (LSSR) or 3D-14 - Body ground	Always	10 kΩ or higher
K1-10 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

Component without harness connected

(Instrument Panel Junction Block Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
3D-14 - MB-5 (LSR)	Always	Below 1 Ω

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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