Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJG9
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: TERMINALS OF ECU; 2016 - 2020 MY Sienna [12/2015 -        ]

TERMINALS OF ECU

1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU

(a) Remove the main body ECU.

(b) Disconnect the D12, D13 and D14 main body ECU connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2I-2 (FLCY) - Body ground

-

Front door courtesy light switch LH input

Driver door Close (off) → Open (on)

10 kΩ or higher → Below 1 Ω

2I-4 (FRCY) - Body ground

-

Front door courtesy light switch RH input

Front passenger door Close (off) → Open (on)

10 kΩ or higher → Below 1 Ω

2I-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

2I-29 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Ignition switch ACC → off

11 to 14 V → Below 1 V

2I-30 (BECU) - Body ground

-

+B (power system signal system) power supply

Always

11 to 14 V

2I-31 (ALTB) - Body ground

-

+B (power system alternator system) power supply

Always

11 to 14 V

2I-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Ignition switch ON → off

11 to 14 V → Below 1 V

D12-3 (LCTY) - Body ground

GR - Body ground

Rear door courtesy light LH switch input

Rear door Close (off) → Open (on)

10 kΩ or higher → Below 1 Ω

D13-6 (RCTY) - Body ground

L - Body ground

Rear door courtesy light RH switch input

Rear door Close (off) → Open (on)

10 kΩ or higher → Below 1 Ω

D13-17 (KSW) - Body ground*1

R - Body ground

Unlock warning switch input

NO key in ignition key cylinder (off) → Key inserted (on)

10 kΩ or higher → Below 1 Ω

D13-19 (BCTY) - Body ground

GR - Body ground

Back door courtesy light switch input

Back door Close (off) → Open (on)

10 kΩ or higher → Below 1 Ω

D14-3 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω
  • *1: w/o Smart Key System

If the result is not as specified, there may be a malfunction in the wire harness.

(d) Reinstall the main body ECU.

(e) Reconnect the D12, D13 and D14 main body ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

2D-1 (ACT-) - Body ground

SB - Body ground

Door lock motor unlock drive output (except driver side)

Multiplex network master switch (door control switch) or driver side door key cylinder off

Below 1 V

Multiplex network master switch (door control switch) or driver side door key cylinder unlocked

11 to 14 V

2D-2 (ACTD) - Body ground

R - Body ground

Driver side door lock motor unlock drive output

Multiplex network master switch (door control switch) or driver side door key cylinder off

Below 1 V

Multiplex network master switch (door control switch) or driver side door key cylinder unlocked

11 to 14 V

2D-4 (ACT+) - Body ground

B - Body ground

Door lock motor lock drive output (all doors)

Multiplex network master switch (door control switch) or driver side door key cylinder off

Below 1 V

Multiplex network master switch (door control switch) or driver side door key cylinder locked

11 to 14 V

2H-36 (FRCY) - Body ground

GR - Body ground

Front door courtesy light switch RH input

Front passenger door open

Below 1 V

Front passenger door closed

11 to 14 V

2H-34 (FLCY) - Body ground

P - Body ground

Front door courtesy light switch LH input

Driver door open

Below 1 V

Driver door closed

11 to 14 V

2H-33 (LSWL) - Body ground

LG - Body ground

Rear door LH side door lock position switch input

Rear door LH side door unlocked

Below 1 V

Ignition switch off, all doors closed and rear door LH side door locked

Pulse generation

D12-3 (LCTY) - Body ground

GR - Body ground

Rear door courtesy light switch LH input

Rear door LH open

Below 1 V

Rear door LH closed

11 to 14 V

D13-6 (RCTY) - Body ground

L - Body ground

Rear door courtesy light switch RH input

Rear door RH open

Below 1 V

Rear door RH closed

11 to 14 V

D13-7 (LSFL) - Body ground

V - Body ground

Driver side door lock position switch input

Driver side door unlocked

Below 1 V

Ignition switch off, all doors closed and driver side door locked

Pulse generation

D13-9 (L1) - Body ground

B - Body ground

Front passenger side door control switch input

Front passenger side door control switch locked

Below 1 V

Front passenger side door control switch off

Pulse generation

D13-10 (UL1) - Body ground

G - Body ground

Front passenger side door control switch input

Front passenger side door control switch unlocked

Below 1 V

Front passenger side door control switch off

Pulse generation

D13-11 (L2) - Body ground

LG - Body ground

Driver side door key-linked lock input

Driver side door key cylinder turned to locked

Below 1 V

Driver side door key cylinder off

11 to 14 V

D13-18 (LSFR) - Body ground

Y - Body ground

Front passenger side door lock position switch input

Front passenger side door unlocked

Below 1 V

Ignition switch off, all doors closed and front passenger side door locked

Pulse generation

D13-19 (BCTY) - Body ground

GR - Body ground

Back door courtesy light switch input

Back door open

Below 1 V

Back door closed

11 to 14 V

D13-24 (UL3) - Body ground

L - Body ground

Driver side door key-linked unlock input

Driver side door key cylinder turned to unlocked

Below 1 V

Driver side door key cylinder locked

11 to 14 V

D14-2 (LSWR) - Body ground

L - Body ground

Rear door RH side door lock position switch input

Rear door RH side door unlocked

Below 1 V

Ignition switch off, all doors closed and rear door RH side door locked

Pulse generation

If the result is not as specified, the main body ECU or instrument panel junction block assembly may have a malfunction.

2. CHECK POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) (w/ Power Back Door System)

(a) Disconnect the K14 power back door ECU (power back door motor unit) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

K14-8 (IG) - Body ground

L - Body ground

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

K14-10 (ECUB) - Body ground

SB - Body ground

Battery power supply

Always

11 to 14 V

K14-11 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

K14-12 (B) - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

If the result is not as specified, there may be a malfunction in the wire harness.

(c) Reconnect the K14 power back door ECU (power back door motor unit) connector.

(d) Initialize the power back door ECU (power back door motor unit) (See page 2016 - 2020 MY Sienna [12/2015 -        ]; DOOR / HATCH: POWER BACK DOOR SYSTEM: INITIALIZATION ).

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

K14-20 (FUL) - Body ground

GR - Body ground

Back door courtesy switch circuit

Back door closed

11 to 14 V

Back door open

Below 1 V

If the result is not as specified, the power back door ECU (power back door motor unit) may have a malfunction.