Tachometer Malfunction

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

DESCRIPTION

In this circuit, the meter ECU receives engine speed signals from the ECM using the CAN communication system. The meter ECU displays the engine speed calculated based on the data received from the ECM.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication DTC is output Diagnosis System.

Result:





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

2. PERFORM ACTIVE TEST USING TECHSTREAM (TACHO METER 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) Check the operation by referring to the table below.

Combination Meter





OK:

Tachometer indication is normal.

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

3. CHECK SFI SYSTEM

(a) Check if the SFI system output the DTC Reading and Clearing Diagnostic Trouble Codes for 2AR-FE, Reading and Clearing Diagnostic Trouble Codes for 2GR-FE).

Result:





B -- GO TO SFI SYSTEM How to Proceed with Troubleshooting

C -- GO TO SFI SYSTEM How to Proceed with Troubleshooting
A -- Continue to next step.

4. READ VALUE USING TECHSTREAM (ENGINE RPM, 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:

(1) for Engine and ECT: Powertrain / Engine and ECT / Data List.

(2) for Combination Meter: Body Electrical / Combination Meter / Data List.

(e) Check the values by referring to the table below.

Combination Meter





Engine and ECT





Result:





HINT
* When the Data List values of the ECUs match, an internal malfunction of the combination meter assembly is suspected.
* When the Data List values of the ECUs do not match, a signal output error of the ECM or an internal malfunction of the combination meter assembly is suspected

B -- GO TO SFI SYSTEM How to Proceed with Troubleshooting

C -- GO TO SFI SYSTEM How to Proceed with Troubleshooting

A -- REPLACE COMBINATION METER ASSEMBLY Removal