Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZL6I
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): TERMINALS OF ECU; 2017 - 2020 MY Sienna [08/2016 -        ]

TERMINALS OF ECU

1. CHECK ENGINE SWITCH

(a) Disconnect the D33 engine switch connector.

(b) Measure the 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

D33-8 (AGND) - Body ground

R - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the D33 engine switch connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D33-9 (TXCT) - D33-8 (AGND)

V - R

Key code output signal
  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D33-9 (TXCT) - D33-8 (AGND)

V - R

Key code output signal
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 1)

D33-10 (CODE) - D33-8 (AGND)

L - R

Demodulated signal of key code data
  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D33-10 (CODE) - D33-8 (AGND)

L - R

Demodulated signal of key code data
  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

Pulse generation

(See waveform 2)

D33-14 (VC5) - D33-8 (AGND)

G - R

Power supply
  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D33-14 (VC5) - D33-8 (AGND)

G - R

Power supply
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 3)

If the result is not as specified, the engine switch may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1

Item

Content

Tester Connection

D33-9 (TXCT) - D33-8 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

(2) Waveform 2

Item

Content

Tester Connection

D33-10 (CODE) - D33-8 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition
  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

(3) Waveform 3

Item

Content

Tester Connection

D33-14 (VC5) - D33-8 (AGND)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

2. CHECK CERTIFICATION ECU

(a) Disconnect the D88 certification ECU connector.

(b) Measure the resistance and voltage 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

D88-1 (+B) - D88-15 (E)

G - W-B

+B power supply

Always

11 to 14 V

D88-15 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the D88 certification ECU connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D88-2 (INDS) - Body ground

B - Body ground

Security indicator light signal

Engine switch on (IG), security indicator light off

Below 2 V

D88-2 (INDS) - Body ground

B - Body ground

Security indicator light signal

Engine switch off, security indicator light blinks

Pulse generation

D88-12 (TXCT) - D88-36 (AGND)

V - R

Engine switch TXCT output
  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D88-12 (TXCT) - D88-36 (AGND)

V - R

Engine switch TXCT output
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 1)

D88-13 (CODE) - D88-36 (AGND)

L - R

Engine switch CODE input
  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D88-13 (CODE) - D88-36 (AGND)

L - R

Engine switch CODE input
  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

Pulse generation

(See waveform 2)

D88-16 (IG) - D88-15 (E)

B - W-B

Ignition power supply

Engine switch off

Below 1 V

D88-16 (IG) - D88-15 (E)

B - W-B

Ignition power supply

Engine switch on (IG)

11 to 14 V

D88-28 (VC5) - D88-36 (AGND)

G - R

Engine switch power supply
  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D88-28 (VC5) - D88-36 (AGND)

G - R

Engine switch power supply
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 3)

D88-34 (EFII) - D88-15 (E)

G - W-B

ECM input signal

Engine switch off

11 to 14 V

D88-34 (EFII) - D88-15 (E)

G - W-B

ECM input signal

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

Pulse generation

(See waveform 4)

D88-35 (EFIO) - D88-15 (E)

V - W-B

ECM output signal

Engine switch off

11 to 14 V

D88-35 (EFIO) - D88-15 (E)

V - W-B

ECM output signal

Engine switch on (IG)

Pulse generation

(See waveform 5)

D88-36 (AGND) - Body ground

R - Body ground

Engine switch ground

Always

Below 1 Ω

If the result is not as specified, the certification ECU may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1

Item

Content

Tester Connection

D88-12 (TXCT) - D88-36 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

(2) Waveform 2

Item

Content

Tester Connection

D88-13 (CODE) - D88-36 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition
  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

(3) Waveform 3

Item

Content

Tester Connection

D88-28 (VC5) - D88-36 (AGND)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition
  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

(4) Waveform 4

Item

Content

Tester Connection

D88-34 (EFII) - D88-15 (E)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(5) Waveform 5

Item

Content

Tester Connection

D88-35 (EFIO) - D88-15 (E)

Tool Setting

5 V/DIV., 50 ms./DIV.

Condition

Engine switch on (IG)

3. CHECK STEERING LOCK ECU

(a) Disconnect the D29 steering lock ECU connector.

(b) Measure the resistance and voltage 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

D29-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

D29-6 (IG2) - Body ground

B - Body ground

Ignition power supply

Engine switch off

Below 1 V

D29-6 (IG2) - Body ground

B - Body ground

Ignition power supply

Engine switch on (IG)

11 to 14 V

D29-7 (B) - Body ground

R - Body ground

+B power supply

Always

11 to 14 V

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

4. CHECK ECM

(a) The values listed under "Specified Condition" are reference values. Because waterproof connectors are used for ECM, inspections cannot be performed with the connectors connected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

B67-53 (E1) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

A69-45 (IMO) - B67-53 (E1)

G - BR

Certification ECU output signal

Engine switch off

11 to 14 V

A69-45 (IMO) - B67-53 (E1)

G - BR

Certification ECU output signal

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

Pulse generation

(See waveform 1)

A69-59 (IMI) - B67-53 (E1)

V - BR

Certification ECU input signal

Engine switch off

11 to 14 V

A69-59 (IMI) - B67-53 (E1)

V - BR

Certification ECU input signal

Engine switch on (IG)

Pulse generation

(See waveform 2)

(b) Waveform:

(1) Waveform 1

Item

Content

Tester Connection

A69-45 (IMO) - B67-53 (E1)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(2) Waveform 2

Item

Content

Tester Connection

A69-59 (IMI) - B67-53 (E1)

Tool Setting

5 V/DIV., 50 ms./DIV.

Condition

Engine switch on (IG)

5. CHECK POWER MANAGEMENT CONTROL ECU

(a) Disconnect the D89 power management control ECU connector.

(b) Measure the resistance and voltage 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

D89-1 (AM22) - Body ground

R - Body ground

Battery

Always

11 to 14 V

D89-2 (AM21) - Body ground

R - Body ground

Battery

Always

11 to 14 V

D89-5 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

D89-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

6. COMBINATION METER ASSEMBLY

(a) Disconnect the D145 combination meter assembly 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

D145-1 (B) - Body ground

W - Body ground

Battery

Always

11 to 14 V

D145-20 (ES) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the D145 combination meter assembly connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D146-3 (LP) - Body ground

B - Body ground

Security indicator light signal

Engine switch on (IG), security indicator light off

Below 2 V

D146-3 (LP) - Body ground

B - Body ground

Security indicator light signal

Engine switch off, security indicator light blinks

Pulse generation

If the result is not as specified, the combination meter assembly may have a malfunction.