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   6 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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.
   COMBINATION METER
   
   

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

   OK

   Tachometer indication is normal.

NG → See step   7 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Rpm	Engine speed / Min.: 0 rpm, Max.: 12750 rpm	Almost same as actual engine speed (Tachometer indication)	If data received from the ECM exceeds the range that can be displayed on the meter, the meter continues to display the maximum value of the range.

   OK

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

NG → See step   4 

OK → See step   7 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
4. Enter the following menus: Powertrain / Engine and ECT / Data List.
5. Check the values by referring to the table below.
   ENGINE AND ECT (FOR 2AZ-FE)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed: Min.: 0 rpm, Max.: 16383.75 rpm	650 to 750 rpm: Idling	-

   ENGINE AND ECT (FOR 2ZR-FE)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed: Min.: 0 rpm, Max.: 16383.75 rpm	650 to 750 rpm: Idling (Automatic transaxle) 600 to 700 rpm: Idling (Manual transaxle)	-

   OK

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

   Result

   Result	Proceed to
   OK	A
   NG (for 2AZ-FE)	B
   NG (for 2ZR-FE)	C

B → See step   8 

C → See step   9 

A: Go to next step 

1. Replace the ECM with a new or known good one. Refer to REMOVAL - Step 5 for 2AZ-FE. Refer to REMOVAL - Step 4 for 2ZR-FE).

   OK

   The operation of the tachometer returns to normal.

NG → See step   7 

OK → END