Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026PN6
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): Emergency Call Switch Illumination Circuit; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

Emergency Call Switch Illumination Circuit

WIRING DIAGRAM

for TMC Made
for TMMMS Made

CAUTION / NOTICE / HINT

NOTICE:

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): PRECAUTION

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for TMC Made

A

for TMMMS Made

B

B

GO TO STEP 5

A

2.

CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH) POWER SOURCE)

(a) Disconnect the I143 DCM (telematics transceiver) connector.

(b) Disconnect the T6 map light assembly (manual (SOS) switch) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

T6-14 (RRID) - Body Ground

Engine switch on (IG)

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I143-3 (SIG-) - T6-8 (GND3)

Always

Below 1 Ω

I143-3 (SIG-) or T6-8 (GND3) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)

(a) Remove the map light assembly (manual (SOS) switch).

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

(Map Light Assembly (Manual (SOS) Switch))

(b) Apply battery voltage to the connector and check that the map light assembly comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → T6-14 (RRID)

Battery negative (-) → T6-8 (GND3)

Always

Manual (SOS) switch illumination comes on

NG

REPLACE MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)

OK

4.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) with a new one.

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

NOTICE:

  • The engine switch must be off.
  • Do not exchange the DCM (telematics transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

5.

CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH) POWER SOURCE)

(a) Disconnect the I143 DCM (telematics transceiver) connector.

(b) Disconnect the T6 map light assembly (manual (SOS) switch) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

T6-20 (RRID) - Body Ground

Engine switch on (IG)

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I143-3 (SIG-) - T6-12 (GND3)

Always

Below 1 Ω

I143-3 (SIG-) or T6-12 (GND3) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

INSPECT MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)

(a) Remove the map light assembly (manual (SOS) switch).

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

(Map Light Assembly (Manual (SOS) Switch))

(b) Apply battery voltage to the connector and check that the map light assembly comes on.

OK:

Measurement Condition

Condition

Specified Condition

Battery positive (+) → T6-20 (RRID)

Battery negative (-) → T6-12 (GND3)

Always

Manual (SOS) switch illumination comes on

OK

GO TO STEP 4

NG

REPLACE MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)