| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIA5 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: MIL Circuit; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
MIL Circuit |
DESCRIPTION
The Malfunction Indicator Lamp (MIL) is used to indicate vehicle malfunctions detected by the ECM. By turning the ignition switch to ON, power is supplied to the MIL circuit, and the ECM provides the circuit ground which illuminates the MIL.
The MIL operation can be checked visually. When the ignition switch is first turned ON, the MIL should illuminate and should then turn off. If the MIL remains illuminated or does not illuminate, conduct the following troubleshooting procedure. If the ECM detects any trouble, the MIL illuminates. At this time, the ECM records a DTC in the memory.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK THAT MIL ILLUMINATES |
(a) Turn the ignition switch to ON.
(b) Check the illumination of the MIL.
Result
|
Result |
Proceed to |
|---|---|
|
MIL remains illuminated (Even after ignition switch is turned ON and several seconds have passed, MIL still remains illuminated) |
A |
|
MIL remains off (Does not illuminate at all) |
B |
| B |
|
|
|
2. |
CHECK WHETHER MIL TURNS OFF |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Check if any DTCs have been stored. Note any DTCs.
(f) Clear the DTCs (See page
![2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
).
(g) Check if the MIL goes off.
Result
|
Result |
Proceed to |
|---|---|
|
MIL goes off |
A |
|
MIL does not go off |
B |
| A |
|
REPAIR CIRCUIT INDICATED BY OUTPUT DTC |
|
|
3. |
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) |
|
(a) Disconnect the ECM connector. |
|
(b) Turn the ignition switch to ON.
(c) Check if the MIL is illuminated.
Text in Illustration
|
*a |
Front view of wire harness connector (to ECM) |
Result
|
Result |
Proceed to |
|---|---|
|
MIL is not illuminated |
A |
|
MIL is illuminated |
B |
| A |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) |
(a) Disconnect the D146 combination meter assembly connector.
(b) Disconnect the A39 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D146-12 (CHK) or A39-24 (W) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK IF ENGINE STARTS |
(a) Start the engine.
|
Result |
Proceed to |
|---|---|
|
Engine starts |
A |
|
Engine does not start* |
B |
HINT:
*: The Techstream cannot communicate with the ECM.
| B |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (ECM TERMINAL VOLTAGE) |
|
(a) Disconnect the ECM connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A39-24 (W) - Body ground |
Ignition switch to ON |
11 to 14 V |
Text in Illustration
|
*a |
Front view of wire harness connector (to ECM) |
| OK |
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) |
(a) Disconnect the D146 combination meter assembly connector.
(b) Disconnect the A39 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D146-12 (CHK) - A39-24 (W) |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|