Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJK7
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): Front Passenger Side Door Entry Unlock Function does not Operate; 2016 - 2020 MY Sienna [12/2015 -        ]

Front Passenger Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the front passenger door entry lock function operates normally, but its entry unlock function does not, this means that the request code from the front passenger door is being output normally. In this case, a malfunction in the touch sensor circuit (from the certification ECU (smart key ECU assembly) to the front door outside handle assembly (touch sensor)) is suspected.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The smart key system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): HOW TO PROCEED WITH TROUBLESHOOTING ). Troubleshoot the smart key system (for entry function) after confirming that the communication system is functioning properly.
  • Confirm that another key is not in the cabin.

PROCEDURE

1.

CHECK POWER DOOR LOCK OPERATION

(a) When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation (See page 2016 - 2020 MY Sienna [12/2015 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: OPERATION CHECK ).

OK:

Door locks operate normally.

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table)

OK

2.

READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU)

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

FR Door Lock Pos

Front RH side door lock position switch signal/UNLOCK or LOCK

UNLOCK: Front RH side door unlocked

LOCK: Front RH side door locked

-

OK:

On the Techstream screen, the display changes between UNLOCK and LOCK as shown in the chart above.

NG

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch)

OK

3.

READ VALUE USING TECHSTREAM (DOOR OUTSIDE HANDLE)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Key / Data List.

(e) Read the Data List according to the display on the Techstream.

Smart Key (Certification ECU (Smart Key ECU Assembly))

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

P-Door Touch Sensor

Status of touch sensor (for front passenger side) / ON or OFF

ON: Touch sensor touched

OFF: Touch sensor not touched

-

OK:

On the Techstream screen, the display changes between ON and OFF as shown in the chart above.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL )

NG

4.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - FRONT DOOR OUTSIDE HANDLE)

(a) Disconnect the certification ECU (smart key ECU assembly) connector.

(b) Disconnect the front door outside handle assembly (for front passenger side) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D88-21 (SEN2) - o1-4 (SENS)

Always

Below 1 Ω

D88-21 (SEN2) - Body ground

Always

10 kΩ or higher

o1-4 (SENS) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (TOUCH SENSOR SIGNAL INPUT)

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

(b) Reconnect the front door outside handle assembly (for front passenger side) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

D88-21 (SEN2) - D88-15 (E)

  • Engine switch off
  • All doors closed
  • Key not in detection area
  • Touch sensor (for front passenger side) not touched

Pulse generation

D88-21 (SEN2) - D88-15 (E)

  • Engine switch off
  • All doors closed
  • Key not in detection area
  • Touch sensor (for front passenger side) touched

Below 2 V

Text in Illustration

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL )

NG

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Front Passenger Side)

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; DOOR / HATCH: FRONT DOOR: DISASSEMBLY 2018 - 2020 MY Sienna [11/2017 -        ]; DOOR / HATCH: FRONT DOOR: DISASSEMBLY )