Tachometer Malfunction [12/2021 - ]: Procedure

1. Check if meter / gauge system DTCs are output.

   Refer to DTC CHECK / CLEAR [02/2017 - ]

   Body Electrical > Combination Meter > Trouble Codes 

   Result

   Result	Proceed to
   Meter / gauge system DTCs are not output.	A
   Meter / gauge system DTCs are output.	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2021 - ] 

Result: 

A 

See step  2

1. Check if SFI system DTCs are output.

   Refer to DTC CHECK / CLEAR [02/2017 - ]

   Powertrain > Engine and ECT > Trouble Codes 

   Result

   Result	Proceed to
   SFI system DTCs are not output.	A
   SFI system DTCs are output.	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2021 - ] 

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus:
   1. for Engine: Powertrain / Engine and ECT / Data List.
   2. for Combination Meter: Body Electrical / Combination Meter / Data List.
5. Read the Data List according to the display on the Techstream.
   1. Engine and ECT

      Powertrain > Engine and ECT > Data List 

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Engine Speed	Engine speed	Min.: 0 rpm, Max.: 16383 rpm	710 to 810 rpm: Idling with warm engine	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

      Powertrain > Engine and ECT > Data List 

      Tester Display
      Engine Speed

   2. Combination Meter.

      Body Electrical > Combination Meter > Data List 

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Engine Rpm	Engine speed	Min.: 0 rpm, Max.:12750 rpm	Almost the same as actual tachometer	-

      Body Electrical > Combination Meter > Data List 

      Tester Display
      Engine Rpm

      Result

      Result	Proceed to
      The Data List values of the ECUs do not match	A
      The Data List values of the ECUs match	B

      HINT: 

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

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [12/2021 - ] 

Result: 

B 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2020 - ]