Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZMV9
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): Engine does not Start but Initial Combustion Occurs; 2017 - 2020 MY Sienna [08/2016 -        ]

Engine does not Start but Initial Combustion Occurs

DESCRIPTION

The key ID code of the transponder chip inside the IG key is compared against the key ID code registered in the transponder key ECU assembly. While checking the code, the transponder key ECU assembly supplies electrical power to the transponder chip in the key by means of the transponder key coil. If the codes match, the immobiliser is then UNSET (released), and after the E/G start permission signal is sent to the ECM, if communication is functioning properly, E/G start can be performed.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the key and transponder key ECU assembly, refer to the Registration (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION ).
  • When replacing the ECM, refer to the INITIALIZATION (See page 2017 MY Sienna [08/2016 - 11/2017]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION 2018 - 2020 MY Sienna [11/2017 -        ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs (See page 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): DTC CHECK / CLEAR ).

HINT:

Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

Result

Result

Proceed to

No DTC output

A

DTC output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

2.

READ VALUE USING TECHSTREAM (IMMOBILISER FUEL CUT)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Data List.

Engine

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Immobiliser Fuel Cut

Status of immobiliser fuel cut / ON or OFF

-

-

OK:

The item in the Data List indicates "OFF"

Result

Result

Proceed to

NG

A

OK

B

B

GO TO SFI SYSTEM

A

3.

CHECK WHETHER ENGINE STARTS

(a) It leaves for 5 seconds by the ignition switch ON status, and the engine starting operation is done.

Result

Result

Proceed to

Engine cannot be started

A

Engine can be started

B

B

USE SIMULATION METHOD TO CHECK

(See page 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2018 - 2020 MY Sienna [11/2017 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING )

A

4.

CHECK ECM (TERMINAL IMI)

(a) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(ECM)

*b

Component with harness connected

(Transponder Key ECU Assembly)

*c

Waveform 1

*d

Waveform A

*e

Waveform B

*f

160 ms

*g

510 ms

-

-

Measurement Condition

Item

Content

Tester Connection

A69-59 (IMI) - D151-13 (EFIO)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected

HINT:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

OK:

Waveform is output normally (refer to illustration).

Result

Result

Proceed to

Normal waveform

A

Waveform (waveform A) not output, or has abnormal wavelength or shape

B

Waveform (waveform B) not output, or has abnormal wavelength or shape

C

B

GO TO STEP 11

C

GO TO STEP 12

A

5.

CHECK ECM (TERMINAL IMO)

(a) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(ECM)

*b

Component with harness connected

(Transponder Key ECU Assembly)

*c

Waveform 1

*d

Waveform C

*e

160 ms

*f

510 ms

Measurement Condition

Item

Content

Tester Connection

A69-45 (IMO) - D151-12 (EFII)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected

HINT:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

OK:

Waveform is output normally (refer to illustration).

Result

Result

Proceed to

Normal waveform

A

Waveform 1 (Waveform C) not output, or has abnormal wavelength or shape

B

B

GO TO STEP 8

A

6.

REGISTER ECU COMMUNICATION ID

(a) Register the communication ID between the transponder key ECU assembly and ECM (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION ).

NEXT

7.

CHECK WHETHER ENGINE STARTS

(a) Using a registered key, turn the ignition switch to ON.

(b) Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.

Result

Result

Proceed to

Engine can be started

A

Engine cannot be started

B

A

END (REGISTERED COMMUNICATION ID WAS DEFECTIVE)

B

GO TO STEP 12

8.

REPLACE ECM

(a) Temporarily replace the ECM with a new one (See page 2017 - 2020 MY Sienna [08/2016 -        ]; 2GR-FKS (ENGINE CONTROL): ECM: REMOVAL ).

NEXT

9.

REGISTER ECU COMMUNICATION ID

(a) Reregister the ECU communication ID (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION ).

NEXT

10.

CHECK WHETHER ENGINE STARTS

(a) Using a registered key, turn the ignition switch to ON.

(b) Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.

OK

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

NG

GO TO SFI SYSTEM

11.

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)

(a) Disconnect the D151 transponder key ECU assembly connector.

(b) Disconnect the A69 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D151-13 (EFIO) - A69-59 (IMI)

Always

Below 1 Ω

D151-13 (EFIO) or A69-59 (IMI) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12.

REPLACE TRANSPONDER KEY ECU ASSEMBLY

(a) Replace the transponder key ECU assembly with a new one (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: TRANSPONDER KEY ECU: REMOVAL ).

NOTICE:

Key ID code registration is necessary when replacing the transponder key ECU assembly, refer to Registration (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION ).

NEXT

13.

CHECK WHETHER ENGINE STARTS

(a) Using a registered key, turn the ignition switch to ON.

(b) Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.

OK

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

NG

GO TO SFI SYSTEM