Tachometer Malfunction

METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Tachometer Malfunction

Tachometer Malfunction

DESCRIPTION

The combination meter receives engine speed signals from the ECM via the CAN line. The combination meter displays engine speed data that is calculated based on the data received from the ECM.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER)
(a) Operate the Techstream according to the display and select the Active Test Scan Tool Testing and Procedures.

Combination Meter





HINT: Make sure that the vehicle is stopped and the engine is idling.

OK:
Needle indication is normal.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
3. READ VALUE USING TECHSTREAM (TACHOMETER)
(a) Operate the Techstream according to the display and select the Data List Scan Tool Testing and Procedures.

Combination Meter





OK:
Engine speed displayed on the Techstream is almost the same as actual engine speed.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
4. READ VALUE USING TECHSTREAM (ENGINE SPEED)
(a) Operate the Techstream according to the display and select the Data List Data List / Active Test.

Result





B -- Go to SFI SYSTEM
A -- REPLACE COMBINATION METER ASSEMBLY