| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000ZMUY |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): TERMINALS OF ECU; 2017 - 2020 MY Sienna [08/2016 - ] | ||
TERMINALS OF ECU
1. CHECK TRANSPONDER KEY ECU ASSEMBLY
(a) Disconnect the D151 transponder key ECU assembly 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 |
|---|---|---|---|---|
|
D151-5 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
D151-1 (+B) - D151-5 (GND) |
B - W-B |
Battery |
Always |
11 to 14 V |
|
D151-2 (IG) - D151-5 (GND) |
B - W-B |
Ignition switch signal |
Ignition switch off |
Below 1 V |
|
Ignition switch ON |
11 to 14 V |
|||
|
D151-3 (KSW) - D151-5 (GND) |
R - W-B |
Unlock warning switch signal |
No key in ignition key cylinder |
10 kΩ or higher |
|
Key in ignition key cylinder |
Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the D151 transponder key ECU assembly connector.
(d) Measure the resistance, voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
D151-3 (KSW) - D151-5 (GND) |
R - W-B |
Unlock warning switch signal |
No key in ignition key cylinder |
11 to 14 V |
|
Key in ignition key cylinder |
Below 1 V |
|||
|
D151-4 (ANT1) - D151-5 (GND) |
B - W-B |
Transponder key coil power source |
No key in ignition key cylinder |
4 to 6 V |
|
Within 3 seconds of inserting key into ignition cylinder |
Pulse generation (See waveform 1) |
|||
|
D151-15 (ANT2) - D151-5 (GND) |
Y - W-B |
Transponder key coil communication |
No key in ignition key cylinder |
4 to 6 V |
|
Within 3 seconds of inserting key into ignition cylinder |
Pulse generation (See waveform 2) |
|||
|
D151-13 (EFIO) - D151-5 (GND) |
V - W-B |
ECM output signal |
Ignition switch off |
Below 1 V |
|
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
Pulse generation (See waveform 3) |
|||
|
D151-12 (EFII) - D151-5 (GND) |
G - W-B |
ECM input signal |
Ignition switch off |
11 to 14 V |
|
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
Pulse generation (See waveform 4) |
|||
|
D151-9 (D) - D151-5 (GND) |
W - W-B |
Diagnostic tester communication |
Without communication |
Below 1 V |
|
During communication |
Pulse generation |
|||
|
D151-7 (CTY) - D151-5 (GND) |
P - W-B |
Door courtesy signal |
Switch pushed |
11 to 14 V |
|
Switch free |
Below 1 V |
|||
|
D151-8 (IND) - D151-5 (GND) |
B - W-B |
Security indicator signal |
Ignition switch off, security indicator light blinks |
Alternating between 11 to 14 V and below 1 V |
|
Ignition switch ON, security indicator light off |
Below 1 V |
If the result is not as specified, the transponder key ECU may have a malfunction.
(e) Inspect using an oscilloscope.
(1) Waveform 1 (Reference)
Measurement Condition
|
Item |
Content |
|---|---|
|
Tester Connection |
D151-4 (ANT1) - D151-5 (GND) |
|
Tool Setting |
20 V/DIV., 2 s./DIV. |
|
Condition |
Within 3 seconds of inserting key into ignition cylinder |
(2) Waveform 2 (Reference)
Measurement Condition
|
Item |
Content |
|---|---|
|
Tester Connection |
D151-15 (ANT2) - D151-5 (GND) |
|
Tool Setting |
20 V/DIV., 2 s./DIV. |
|
Condition |
Within 3 seconds of inserting key into ignition cylinder |
(3) Waveform 3 (Reference)
Text in Illustration
|
*a |
Approximately 160 ms |
*b |
Approximately 510 ms |
Measurement Condition
|
Item |
Content |
|---|---|
|
Tester Connection |
D151-13 (EFIO) - D151-5 (GND) |
|
Tool Setting |
2 V/DIV., 500 ms./DIV. |
|
Condition |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
(4) Waveform 4 (Reference)
Text in Illustration
|
*a |
Approximately 160 ms |
*b |
Approximately 510 ms |
Measurement Condition
|
Item |
Content |
|---|---|
|
Tester Connection |
D151-12 (EFII) - D151-5 (GND) |
|
Tool Setting |
2 V/DIV., 500 ms./DIV. |
|
Condition |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
2. 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 |
Transponder key ECU output signal |
Ignition switch off |
11 to 14 V |
|
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
Pulse generation (See waveform 1) |
|||
|
A69-59 (IMI) - B67-53 (E1) |
V - BR |
Transponder key ECU input signal |
Ignition switch off |
Below 1 V |
|
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
Pulse generation (See waveform 2) |
(b) Inspect using an oscilloscope.
(1) Waveform 1 (Reference)
Text in Illustration
|
*a |
Approximately 160 ms |
*b |
Approximately 510 ms |
|
Tester Connection |
A69-45 (IMO) - B67-53 (E1) |
|
Tool Setting |
2 V/DIV., 500 ms./DIV. |
|
Condition |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
(2) Waveform 2 (Reference)
Text in Illustration
|
*a |
Approximately 160 ms |
*b |
Approximately 510 ms |
|
Tester Connection |
A69-59 (IMI) - B67-53 (E1) |
|
Tool Setting |
2 V/DIV., 500 ms./DIV. |
|
Condition |
Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal |
3. 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 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 |
Ignition switch ON, security indicator light off |
11 to 14 V |
|
Ignition switch off, security indicator light blinks |
Alternating between 11 to 14 V and below 1 V |
If the result is not as specified, the accessory meter assembly may have a malfunction.
|
|