| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000ZP1E |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Tachometer Malfunction; 2017 - 2020 MY Sienna [08/2016 - ] | ||
|
Tachometer Malfunction |
DESCRIPTION
In this circuit, the meter CPU receives engine speed signals from the ECM using the CAN communication system (CAN V1 Bus). The meter CPU displays the engine speed calculated based on the data received from the ECM.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if a CAN communication DTC is output (See page
![2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM](/t3Portal/stylegraphics/info.gif)
).
Result
|
Result |
Proceed to |
|---|---|
|
CAN communication DTC is not output |
A |
|
CAN communication DTC is output |
B |
| B |
|
GO TO CAN COMMUNICATION SYSTEM
|
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER OPERATION) |
(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 / Combination Meter / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
Combination Meter
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
TachoMeter Operation |
Tachometer |
OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000 |
Operate with IG ON and the vehicle is stopped. |
OK:
Tachometer indication is normal.
| NG |
|
|
|
3. |
READ VALUE USING TECHSTREAM (ENGINE RPM) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) According to the display on the Techstream, read the Data List.
Combination Meter
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Engine Rpm |
Engine speed/ Min.: 0 rpm, Max.: 12750 rpm |
600 to 700 rpm: Idling |
- |
OK:
Engine speed displayed on the Techstream is almost the same as the tachometer indication.
HINT:
Check the engine speed when the engine is fully warmed up, and the air conditioning and all electrical accessories are off.
| NG |
|
|
|
4. |
CHECK ENGINE CONTROL SYSTEM |
(a) Check if a engine control DTC is output (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
Engine control DTC is not output |
A |
|
Engine control DTC is output |
B |
| A |
|
| B |
|
|
|