Tachometer Malfunction

METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Tachometer Malfunction; 2013 MY FR-S [03/2012 -]
- Tachometer Malfunction

DESCRIPTION

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication DTCs are output Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO CAN COMMUNICATION SYSTEM Meter / Gauge System
A -- Continue to next step.

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 tester, perform the Active Test.

Combination Meter





OK:

The 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.

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 tester, read the Data List.

Combination Meter





OK:

The engine speed displayed on the tester is approximately the same as that displayed on the combination meter assembly.

NOTICE:
Determine whether the value displayed on the tester is within the acceptable range by referring to the reference values described in "On-Vehicle Inspection" Component Tests and General Diagnostics.

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

4. CHECK SFI SYSTEM

(a) Check if the SFI system outputs DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO SFI SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

5. READ VALUE USING TECHSTREAM (ENGINE SPEED)

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List.

(e) According to the display on the tester, read the Data List.

Combination Meter





OK:

The engine speed displayed on the tester is approximately the same as that displayed on the combination meter assembly.

NOTICE:
Determine whether the value displayed on the tester is within the acceptable range by referring to the reference values described in "On-Vehicle Inspection" Component Tests and General Diagnostics.

NG -- GO TO SFI SYSTEM How to Proceed With Troubleshooting
OK -- Continue to next step.

6. REPLACE COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly with a new or a normal one Removal.

OK:

The operation of the tachometer returns to normal.

NG -- REPLACE ECM Removal

OK -- END