Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N4M2
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: TELEMATICS: TELEMATICS SYSTEM (for HV Model): Remote Engine Starter does not Operate; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

Remote Engine Starter does not Operate

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the DCM (telematics transceiver), refer to Registration.

w/o Smart Key System: Click here 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

w/ Smart Key System: Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

PROCEDURE

1.

CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function)

(a) Check that the hybrid system can be started by pressing the power switch.

Result

Proceed to

Hybrid system can be started.

A

Hybrid system cannot be started.

B
B

GO TO SMART KEY SYSTEM (for Start Function)

A

2.

REGISTRATION

HINT:

If registration is not performed after replacing any of the following parts, the remote engine start and stop will not be available.

  • Certification ECU (smart key ECU assembly)
  • DCM (telematics transceiver)

(a) Perform remote engine start and stop registration.

w/o Smart Key System: Click here 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

w/ Smart Key System: Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

(b) Check if the problem symptom recurs.

Result

Proceed to

System does not return to normal.

A

System returns to normal.

B
B

END
A

3.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Smart Access > Clear DTCs

(b) Check for DTCs.

Body Electrical > Smart Access > Trouble Codes

Result

Proceed to

DTC B2285 is not output.

A

DTC B2285 is output.

B
B

GO TO DTC B2285

A

4.

CHECK DCM (TELEMATICS TRANSCEIVER)

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

*a

Front view of harness connector

(to DCM (Telematics Transceiver))

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I143-30 (SLPD) - Body ground

Steering locked

11 to 14 V

Steering unlocked

Below 1.5 V

HINT:

The steering locks when any door is opened with the shift lever in P and the power switch off. The steering unlocks when the power switch is turned on (ACC).

OK

REPLACE DCM (TELEMATICS TRANSCEIVER)

NG

5.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

(b) Disconnect the I1 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I143-30 (SLPD) - I1-12 (SLP)

Always

Below 1 Ω
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR