DTC P1625 2AD-FHV

 

The ECM reduces injector operation speed and applied voltage to the injector to reduce the sound it produces during idling. To do this, the ECM outputs applied voltage switching signals to terminal IJEN of the EDU from terminal IDLO of the ECM.

Toyota fault code list DTC P1625

DTC No.	DTC Detection Condition	Trouble Area
P1625	When either condition below is met: With the engine running at idle, voltage of the ECM IDLO terminal is 0.05 V or less for 3 seconds or more. With the engine running at speeds higher than idle, voltage of the ECM IDLO terminal is 3.4 V or more for 3 seconds or more.	Open or short in idle control circuit ECM

 

NOTICE:

After replacing the ECM, the new ECM needs registration and initialization.

1.CHECK WIRE HARNESS (EDU - ECM)

1. Disconnect the B51 EDU connector.

2. Disconnect the B32 ECM connector.

3. Measure the resistance of the wire harness connectors.

    

   Standard resistance:

   Tester Connection	Specified Condition
   B51-2 (IJEN) - B32-62 (IDLO)	Below 1 ?
   B51-2 (IJEN) - B32-62 (IDLO) - Body ground	10 k? or higher

4. Reconnect the EDU connector.

5. Reconnect the ECM connector.

 

NG	REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

2.REPLACE EDU

1. Replace the EDU.

 

NEXT

3.CHECK WHETHER DTC OUTPUT RECURS

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on (IG) and turn the tester ON.

3. Clear DTCs.

4. Start the engine and drive the vehicle for approximately 15 minutes.

5. Enter the following menus: Powertrain / Engine and ECT / DTC.

6. Read the DTCs.

    

   Result:

   Display (DTC Output)	Proceed to
   P1625	A
   No output	B

 

OK	SYSTEM IS OK

NG
REPLACE ECM