| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000YS0K |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: LIGHTING (INT): LIGHTING SYSTEM: IG Signal Circuit; 2017 - 2020 MY Sienna [08/2016 - ] | ||
|
IG Signal Circuit |
DESCRIPTION
This circuit detects the ignition switch ON or off condition, and sends it to the main body ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (IG SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on the Techstream, read the Data List.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
IG SW |
Ignition switch or engine switch IG signal/ON or OFF |
ON: Ignition switch ON OFF: Ignition switch off |
- |
OK:
Normal conditions listed above are displayed.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
|
2. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND) |
|
(a) Disconnect the instrument panel junction block assembly connectors. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2K-1 - Body ground |
Always |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2D-5 - Body ground |
Always |
Below 1 Ω |
(d) Reconnect the instrument panel junction block assembly connectors.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK VEHICLE CONDITION |
(a) Check the vehicle condition.
Result
|
Condition |
Proceed to |
|---|---|
|
w/o Smart Key System |
A |
|
w/ Smart Key System |
B |
| B |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - IGNITION SWITCH) |
(a) Disconnect the 2A instrument panel junction block assembly connector.
(b) Disconnect the D27 ignition switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2A-16 - D27-4 (IG1) |
Always |
Below 1 Ω |
|
2A-38 - D27-2 (AM1) |
Always |
Below 1 Ω |
|
2A-16 - Body ground |
Always |
10 kΩ or higher |
|
2A-38 - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the ignition switch connector.
(e) Reconnect the instrument panel junction block assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT IGNITION SWITCH |
|
(a) Remove the ignition switch. Click here
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (AM1) - 4 (IG1) |
Ignition switch off |
10 kΩ or higher |
|
Ignition switch ON |
Below 1 Ω |
(c) Reinstall the ignition switch.
| NG |
|
|
|
6. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
(a) Remove the main body ECU from the instrument panel junction block assembly. Click here
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2I-32 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
(c) Reinstall the main body ECU to the instrument panel junction block assembly.
Click here
![2016 - 2020 MY Sienna [12/2015 - ]; POWER DISTRIBUTION: MAIN BODY ECU: INSTALLATION](/t3Portal/stylegraphics/info.gif)
| OK |
|
| NG |
|
|
7. |
CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT) |
|
(a) Disconnect the instrument panel junction block assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2A-16 - Body ground |
Engine switch on (IG) |
11 to 14 V |
(c) Reconnect the instrument panel junction block assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
(a) Remove the main body ECU from the instrument panel junction block assembly. Click here
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2I-32 (IG) - Body ground |
Engine switch on (IG) |
11 to 14 V |
(c) Reinstall the main body ECU to the instrument panel junction block assembly.
| OK |
|
| NG |
|
|
|