Tachometer Malfunction: Procedure

1. Check if a CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .
   RESULT
   
   

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

B → See step   8 

A: Go to next step 

1. Use the Active Test to check the operation of the tachometer. Refer to DATA LIST / ACTIVE TEST .
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Tacho Meter Operation	Tachometer	0, 1000, 2000, 3000, 4000, 5000, 6000, 7000 (rpm)	Confirm that the vehicle is stopped with the engine idling.

   OK

   Tachometer indication is normal.

NG → See step   6 

OK: Go to next step 

1. Use the Data List to check the engine speed. Refer to DATA LIST / ACTIVE TEST .
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Rpm	Engine speed/Min.: 0 rpm, Max.: 12750 rpm	550 to 780 rpm (When idling)	-

   OK

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

2. Record the engine speed displayed on the Techstream.

   HINT: 

   Check the engine speed when the engine is fully warmed up and the air conditioning and all electrical accessories are off.

NG → See step   6 

OK: Go to next step 

1. Use the Data List to check the engine speed. Refer to DATA LIST / ACTIVE TEST .
   ENGINE AND ECT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed/Min.: 0 rpm, Max.: 16383 rpm	550 to 780 rpm (When idling)	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 or varies greatly from the actual engine speed.

   OK

   Engine speed displayed on the Techstream is almost the same as the previously recorded Techstream value (Body Electrical / Combination Meter / Data List / Engine Rpm).

NG → See step   7 

OK: Go to next step 

1. Replace the ECM with a new or normally functioning one. Refer to REMOVAL .

   OK

   The operation of the tachometer returns to normal.

NG → See step   6 

OK → END (ECM IS DEFECTIVE)