Tachometer Malfunction

METER: METER / GAUGE SYSTEM: Tachometer Malfunction
- Tachometer Malfunction

DESCRIPTION

The combination meter assembly controls the tachometer in accordance with engine speed signals from the ECM through the CAN communication system.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(e) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART How to Proceed With Troubleshooting
A -- Continue to next step.

2. CONFIRM DTC OUTPUT (ENGINE CONTROL SYSTEM)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(e) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART How to Proceed With Troubleshooting
A -- Continue to next step.

3. 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





OK:

Engine speed displayed on the tester is approximately the same as that of the tachometer reading.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal
OK -- Continue to next step.

4. 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





OK:

Engine speed displayed on the tester is approximately the same as that displayed on the combination meter.

NOTICE:
Determine whether the value displayed on the tester is within the acceptable range by referring to reference values described in "ON-VEHICLE INSPECTION" On-Vehicle Inspection.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK How to Proceed With Troubleshooting