Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001KTJ4
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [09/2019 - 04/2020]
Title: TELEMATICS: TELEMATICS SYSTEM (for Hatchback): Remote Engine Starter does not Operate; 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]

Remote Engine Starter does not Operate

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

PROCEDURE

1.

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

(a) Check that the engine can be started by pressing the engine switch.

Result

Proceed to

Engine can be started.

A

Engine 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.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): 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

Click here THEFT DETERRENT / KEYLESS ENTRY > SMART KEY SYSTEM (for Start Function) > 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 engine switch off. The steering unlocks when the engine 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