Tachometer Malfunction [07/2015 - ]: Procedure

1. Check if CAN communication DTCs are output (Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] w/ Central Gateway ECU. Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] w/o Central Gateway ECU).

   Result

   Result	Proceed to
   CAN communication DTCs are not output.	A
   CAN communication DTCs are output (w/ Central Gateway ECU).	B
   CAN communication DTCs are output (w/o Central Gateway ECU).	C

Result:  B

B 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )

Result:  C

C 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )

Result:  A

A 

See step  2

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. Perform the Active Test according to the display on the Techstream.
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Tacho Meter Operation	Tachometer	OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000	-

   OK

   Tachometer indication is normal.

Result:  NG

NG 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [07/2015 - ] )

Result:  OK

OK 

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 / Data List.
5. Read the Data List according to the display on the Techstream.
   COMBINATION METER
   
   

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

   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:  NG

NG 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [07/2015 - ] )

Result:  OK

OK 

See step  4

1. Check if SFI system DTCs are output (Refer to DTC CHECK / CLEAR [07/2015 - ] ).

   Result

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

Result:  B

B 

GO TO SFI SYSTEM 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [07/2015 - 08/2016] Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2016 - ] )

Result:  A

A 

See step  5

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 and ECT: 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.
   ENGINE AND ECT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Stored as Freeze Frame Data
   Engine Speed	Engine speed/Min.: 0 rpm, Max.: 16383 rpm	600 to 700 rpm: Idling	Yes
   	Results of real-vehicle check: Idling (engine warmed up and A/C off): 660 rpm
   	Diagnostic Note: When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.

   COMBINATION METER
   
   

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

   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

B 

REPLACE ECM 

(Refer to REMOVAL [07/2015 - ] )

Result:  A

A 

See step  6

1. Replace the combination meter assembly with a new one (Refer to REMOVAL [07/2015 - ] ).

   OK

   The operation of the tachometer returns to normal.

Result:  OK

OK 

END 

Result:  NG

NG 

REPLACE ECM 

(Refer to REMOVAL [07/2015 - ] )