Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001D07E
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 01/2019]
Title: LIGHTING (INT): LIGHTING SYSTEM (for Gasoline Model): Door Unlock Detection Switch Circuit; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

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.

Click here 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream 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 unlock detection switch signal

OFF or ON

OFF: Rear door RH locked

ON: Rear door RH unlocked

-

RL-Door Lock Pos SW

Rear door LH unlock detection switch signal

OFF or ON

OFF: Rear door LH locked

ON: Rear door LH unlocked

-

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

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

NG ("FL Door Lock Pos" is not normal)

B

NG ("FR Door Lock Pos" is not normal)

C

NG ("RL-Door Lock Pos SW" and "RR-Door Lock Pos SW" are not normal)

D
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 5

D

GO TO STEP 8

B

2.

INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: FRONT DOOR LOCK: REMOVAL

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: FRONT DOOR LOCK: INSPECTION

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

OK

3.

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

(a) Disconnect the 4F 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

L4-8 (LSSR) - 4F-13

Always

Below 1 Ω

L4-8 (LSSR) or 4F-13 - Body ground

Always

10 kΩ or higher

L4-7 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4F-13 - MB-19 (LSFL)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

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 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: FRONT DOOR LOCK: REMOVAL

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: FRONT DOOR LOCK: INSPECTION

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH

OK

6.

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

(a) Disconnect the 4F 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

K5-7 (LSSR) - 4F-12

Always

Below 1 Ω

K5-7 (LSSR) or 4F-12 - Body ground

Always

10 kΩ or higher

K5-8 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4F-12 - MB-17 (LSFR)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

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 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: REAR DOOR LOCK: REMOVAL

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: REAR DOOR LOCK: INSPECTION

NG

REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY LH

OK

9.

INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY RH

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: REAR DOOR LOCK: REMOVAL

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: REAR DOOR LOCK: INSPECTION

NG

REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY RH

OK

10.

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

(a) Disconnect the 4F 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

N1-6 (LSSR) - 4F-14

Always

Below 1 Ω

N1-9 (E) - Body ground

Always

Below 1 Ω

M1-6 (LSSR) - 4F-14

Always

Below 1 Ω

M1-9 (E) - Body ground

Always

Below 1 Ω

N1-6 (LSSR), M1-6 (LSSR) or 4F-14 - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

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

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4F-14 - MB-5 (LSR)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY