Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001PY3X
Model Year Start: 2021 Model: Avalon HV Prod Date Range: [08/2020 -           ]
Title: TELEMATICS: TELEMATICS SYSTEM: Remote Engine Starter does not Operate; 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]

Remote Engine Starter does not Operate

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

for HV Model: Click here 2021 - 2022 MY Avalon HV [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

for Gasoline Model: Click here 2021 - 2022 MY Avalon [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

PROCEDURE

1.

CHECK SMART KEY SYSTEM (for Start Function)

(a) Check that the engine or hybrid system can be started by pressing the ignition switch.

Result

Proceed to

Engine or hybrid system can be started.

A

Engine or hybrid system cannot be started.

B
B

GO TO SMART KEY SYSTEM (for Start Function)

for HV Model: Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

for Gasoline Model: Click here 2019 - 2022 MY Avalon [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

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.

for HV Model: Click here 2021 - 2022 MY Avalon HV [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

for Gasoline Model: Click here 2021 - 2022 MY Avalon [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline 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 Key > Clear DTCs

(b) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

Result

Proceed to

DTC B2285 is not output.

A

DTC B2285 is output.

B
B

GO TO DTC B2285

for HV Model: Click here 2021 - 2022 MY Avalon HV [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): B2285; Steering Lock Position Signal Circuit Malfunction

for Gasoline Model: Click here 2021 - 2022 MY Avalon [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): B2285; Steering Lock Position Signal Circuit Malfunction

A

4.

CHECK DCM (TELEMATICS TRANSCEIVER)

(a) Disconnect the G124 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

G124-30 (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 ignition switch off. The steering unlocks when the ignition switch is turned to ON.

OK

REPLACE DCM (TELEMATICS TRANSCEIVER)

NG

5.

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

(a) Disconnect the G124 DCM (telematics transceiver) connector.

(b) Disconnect the G40 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

G124-30 (SLPD) - G40-14 (SLP)

Always

Below 1 Ω
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR