Tachometer Malfunction [09/2015 - ]: Procedure

1. Check for DTC (Refer to DIAGNOSIS SYSTEM [09/2015 - ] ).
   RESULT
   
   

   Result	Proceed to
   CAN communication system DTC is not output	A
   CAN communication system DTC is output	B

Result:  B

B 

Go to CAN COMMUNICATION SYSTEM 

(Refer to PRECAUTION [09/2015 - ] )

Result:  A

A 

See step  2

1. Operate the Techstream according to the display and select "Active Test".

   OK

   Needle indication is normal.

   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range
   Tachometer operation	Tachometer	0, 1000, 2000, 3000, 4000, 5000, 6000, 7000

   HINT: 

   Confirm that the vehicle is stopped and engine is idling.

Result:  NG

NG 

REPLACE NO. 1 METER ECU 

(Refer to DISASSEMBLY [09/2015 - ] )

Result:  OK

OK 

See step  3

1. Operate the Techstream according to the display and select "Data List".

   OK

   Engine speed displayed on Techstream is almost the same as actual engine speed.

   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Rpm	Engine speed / Min.: 0, Max.: 12750	Idling: 700 to 800	Unit: rpm

Result:  OK

OK 

REPLACE NO. 1 METER ECU 

(Refer to DISASSEMBLY [09/2015 - ] )

Result:  NG

NG 

See step  4

1. Operate the Techstream according to the display and select "Data List".

   OK

   Engine speed displayed on the Techstream is almost the same as the actual engine speed.

   ENGINE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed / Min.: 0, Max.: 16383.75	Idling: 700 to 800	Unit: rpm

Result:  NG

NG 

Go to SFI SYSTEM 

(Refer to PRECAUTION [09/2015 - ] )

Result:  OK

OK 

See step  5

1. Temporarily replace the No. 1 meter ECU with a new one (Refer to DISASSEMBLY [09/2015 - ] ).

Result:  NEXT

NEXT 

See step  6

1. Check the operation of the tachometer returns to normal (Refer to OPERATION CHECK [09/2015 - ] ).

   OK

   Operation of tachometer returns to normal.

Result:  OK

OK 

END (NO. 1 METER ECU IS DEFECTIVE) 

Result:  NG

NG 

REPLACE ECM 

(Refer to REMOVAL [09/2015 - ] )