Tachometer Malfunction [02/2024 - ]: Procedure

1. Check if CAN communication DTCs are output.

   Refer to DIAGNOSIS SYSTEM [02/2024 - ]

   Result

   Result	Proceed to
   CAN communication DTCs are not output.	A
   CAN communication DTCs are output.	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ] 

Result: 

A 

See step  2

1. Check for SFI system DTCs are output.

   Powertrain > Engine > Trouble Codes 

   Result

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

Result: 

B 

GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [02/2024 - ] 

Result: 

A 

See step  3

1. Using the GTS, read the Data List.

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed	Min.: 0 rpm, Max.: 16383 rpm	875 to 975 rpm: Idling (shift lever in P, engine warmed up)	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

   Powertrain > Engine > Data List 

   Tester Display
   Engine Speed

   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.

   OK

   Engine speed value displayed on the GTS is almost the same as the tachometer indication.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2024 - ] 

Result: 

NG 

See step  4

1. Using the GTS, read the Data List.

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Engine RPM	Engine speed	Min.: 0 rpm, Max.: 12700 rpm	Actual engine speed	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Engine RPM

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed	Min.: 0 mph, Max.: 16383 rpm	875 to 975 rpm: Idling (shift lever in P, engine warmed up)	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

   Powertrain > Engine > Data List 

   Tester Display
   Engine Speed

   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, an internal malfunction of the combination meter assembly is suspected.

   OK

   The Data List values of the ECUs do match.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [02/2024 - ] 

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2024 - ]