Dtc P1601 Eeprom Error - Injector Correction Value, Dpnr Thermal Degradation Record

Engine. Lexus Is250, Is220D. Gse20 Ale20
2Ad-Fhv Engine Control System. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

INSPECTION PROCEDURE

CHECK IF DTC OUTPUT RECURS (IN ADDITION TO P1601)

CHECK DATA LIST (INJECTOR MEMORY ERROR AND DPNR CATALYST DETERIORATION)

CHECK INJECTOR COMPENSATION CODE

REGISTER INJECTOR COMPENSATION CODE

CHECK WHETHER DTC OUTPUT RECURS

CHECK CATALYST RECORD OF DPNR THERMAL DETERIORATION

CHECK WHETHER DTC OUTPUT RECURS

DTC P1601 EEPROM Error - Injector Correction Value, DPNR Thermal Degradation Record


DESCRIPTION

HINT:
Whether the abnormality occurs in the DPNR catalyst thermal deterioration history data or in the injector compensation code can be determined by checking the Data List.

DTC No.
DTC Detection Condition
Trouble Area
P1601
  1. Injector compensation code is not registered (1 trip detection logic)
  2. Wrong injector compensation code is registered (1 trip detection logic)
  1. Injector compensation code
  2. ECM
  1. The DPNR catalyst thermal deterioration history data in the ECM is still the initial value (1 trip detection logic)
  2. The DPNR catalyst thermal deterioration history data is not recorded correctly in the ECM (2 trip detection logic)

INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
1.CHECK IF DTC OUTPUT RECURS (IN ADDITION TO P1601)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch ON (IG) and turn the intelligent tester ON.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result:

    Display (DTC Output)
    		Proceed to
    P1601
    		A
    Other DTCs
    		B


B
GO TO DTC CHART
A


2.CHECK DATA LIST (INJECTOR MEMORY ERROR AND DPNR CATALYST DETERIORATION)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch ON (IG) and turn the intelligent tester ON.

  1. Enter the following menus: Powertrain / Engine / Catalyst Memory Error and Injector Memory Error.

    Result:

    Item
    		Proceed to
    Catalyst Memory Error: No Error
    Injector Memory Error: Error
    		A
    Catalyst Memory Error: Error
    Injector Memory Error: No Error
    		B


B
Go to step 6
A


3.CHECK INJECTOR COMPENSATION CODE

  1. Read the injector compensation codes (Click here).

    OK:
    Compensation codes stored in the ECM match compensation codes of the installed injectors.


OK
REPLACE ECM
NG


4.REGISTER INJECTOR COMPENSATION CODE

  1. Input the injector compensation codes (Click here).

    OK:
    Input of the injector compensation code is completed.


NG
REPLACE ECM
OK


5.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch ON (IG) and turn the intelligent tester ON.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result:

    Display (DTC Output)
    		Proceed to
    P1601
    		A
    No DTC output
    		B


A
REPLACE ECM
B

END

6.CHECK CATALYST RECORD OF DPNR THERMAL DETERIORATION

  1. Read the catalyst record of DPNR thermal deterioration (Click here).

  1. Set the catalyst record of DPNR thermal deterioration (Click here).

    OK:
    Both reading and setting are completed.


NG
REPLACE ECM AND EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
OK


7.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch ON (IG) and turn the intelligent tester ON.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result:

    Display (DTC Output)
    		Proceed to
    P1601
    		A
    No DTC output
    		B


A
REPLACE ECM AND EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
B

END