Tachometer Malfunction [12/2021 - ]: Procedure

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.: 12750 rpm	Actual engine speed	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Engine RPM

   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 error of the ECM or an internal malfunction of the combination meter assembly is suspected.

   OK

   The Data List values of the ECUs do not match.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

OK 

See step  2

1. Check if SFI system DTCs are output.

   Powertrain > Engine > Trouble Codes 

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO SFI SYSTEM 

w/ Canister Pump Module: Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 10/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2023 - ]

w/o Canister Pump Module: Refer to DIAGNOSIS SYSTEM [12/2021 - ]

Result: 

OK 

See step  3

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.: 12750 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	600 to 800 rpm: Idling (shift lever in P, engine warmed up and A/C off)	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, a signal output error of the ECM or an internal malfunction of the combination meter assembly is suspected.

   OK

   The Data List values of the ECUs do not match.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

Result: 

NG 

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