Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026PP1
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): Emergency Call Switch Illumination Circuit; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

Emergency Call Switch Illumination Circuit

WIRING DIAGRAM

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 HV [09/2022 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): PRECAUTION

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

PROCEDURE

1.

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

Power 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

2.

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 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

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

(b) Apply auxiliary 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) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

OK

3.

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 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

NOTICE:

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

PERFORM DCM ACTIVATION