| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Meter/Gauge/Display | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002ZM7006X |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Tachometer Malfunction |
DESCRIPTION
The combination meter receives engine revolution signals from the ECM via the CAN line. The combination meter displays engine revolution data that is calculated based on the data received from the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK DTC |
(a) Use the Techstream to check if the CAN communication system is functioning normally
.
Result
|
Result |
Proceed to |
|---|---|
|
CAN communication system DTC is not output |
A |
|
CAN communication system DTC is output |
B |
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER) |
(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 |
|---|---|---|---|
|
Tacho Meter Operation |
Tachometer |
0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000 |
- |
OK:
Needle indication is normal.
HINT:
Confirm that the vehicle is stopped and engine idling.
|
|
3. |
READ VALUE USING TECHSTREAM (TACHOMETER) |
(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 / 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, Max.: 12750 |
Idling: 650 to 750 |
Unit: rpm |
OK:
Engine speed displayed on the Techstream is almost the same as that of the tachometer reading.
|
|
4. |
READ VALUE USING TECHSTREAM (ENGINE SPEED) |
(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 / Data List.
(e) According to the display on the Techstream, read the Data List.
Engine
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Engine Speed |
Engine speed/Min.: 0, Max.: 16838 |
Idling: 650 to 750 |
Unit: rpm |
OK:
Engine speed displayed on the Techstream is almost the same as that of the tachometer reading.
Result
|
Result |
Proceed to |
|---|---|
|
Engine speed displayed on the Techstream is almost same as actual engine speed |
A |
|
Engine speed displayed on the Techstream is not same as actual engine speed (for 2UZ-FE) |
B |
|
Engine speed displayed on the Techstream is not same as actual engine speed (for 3UR-FE) |
C |
|
|
|