Tachometer Malfunction [10/2017 - 11/2021]: Procedure

1. Check if CAN communication DTCs are output.

   Refer to DIAGNOSIS SYSTEM [10/2017 - 09/2018] , or refer to DIAGNOSIS SYSTEM [09/2018 - 09/2020] , or refer to DIAGNOSIS SYSTEM [09/2020 - 11/2021]

   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 [10/2016 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] 

Result: 

A 

See step  2

1. Confirm the vehicle type.

   Result

   Result	Proceed to
   except F SPORT models	A
   for F SPORT models	B

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. Check the operation by referring to the table below.

   Body Electrical > Combination Meter > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   TachoMeter Operation	Tachometer	OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000	-

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   TachoMeter Operation

   OK

   Tachometer indication is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2016 - 09/2020]  , or refer to  REMOVAL [09/2020 - ] 

Result: 

OK 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
5. Check the values by referring to the table below.

   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	600 to 700 rpm: Idling	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Engine Rpm

   OK

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

   HINT: 

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2016 - 09/2020]  , or refer to  REMOVAL [09/2020 - ] 

Result: 

OK 

See step  5

1. Check if SFI system DTCs are output.

   for 2GR-FKS: Refer to DTC CHECK / CLEAR [10/2017 - ]

   for 8AR-FTS: Refer to DTC CHECK / CLEAR [08/2015 - ]

   Powertrain > Engine > Trouble Codes 

   Result

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

Result: 

B 

GO TO SFI SYSTEM 

for 2GR-FKS: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - ]

for 8AR-FTS: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ]

Result: 

A 

See step  6

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus:
   1. for Engine: Powertrain / Engine / Data List.
   2. for Combination Meter: Body Electrical / Combination Meter / Data List.
5. Check the values by referring to the table below.
   1. Engine

      Powertrain > Engine > Data List 

      Tester Display	Measurement Item	Range	Normal Condition	Reference Value	Diagnostic Note
      Engine Speed	Engine speed	Min.: 0 rpm, Max.: 16383 rpm	for 2GR-FKS: 600 to 700 rpm: Idling for 8AR-FTS: 750 to 850 rpm: Idling (shift lever in N, engine warmed up and A/C off)	for 2GR-FKS: Idling (engine warmed up and A/C off): 635 rpm for 8AR-FTS: -	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

   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	600 to 700 rpm: Idling	-

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

Result: 

B 

REPLACE ECM 

for 2GR-FKS: Refer to REMOVAL [10/2017 - ]

for 8AR-FTS: Refer to REMOVAL [08/2015 - ]

Result: 

A 

See step  7

1. Replace the combination meter assembly with a new or known good one.

   Refer to REMOVAL [10/2016 - 09/2020] , or refer to REMOVAL [09/2020 - ]

   OK

   The operation of the tachometer returns to normal.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE ECM 

for 2GR-FKS: Refer to REMOVAL [10/2017 - ]

for 8AR-FTS: Refer to REMOVAL [08/2015 - ]