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

Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM

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 ConditionTrouble Area
P1601
Injector compensation code is not registered (1 trip detection logic)
Wrong injector compensation code is registered (1 trip detection logic)
Injector compensation code
ECM
The DPNR catalyst thermal deterioration history data in the ECM is still the initial value (1 trip detection logic)
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 and initialization .
1.CHECK IF DTC OUTPUT RECURS (IN ADDITION TO P1601)

Connect the intelligent tester to the DLC3.

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

Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs.

  • Result:
  • Display (DTC Output)Proceed to
    P1601A
    Other DTCsB
B
Go to step 6
A
3.CHECK INJECTOR COMPENSATION CODE

Read the injector compensation codes .

  • OK:
  • Compensation codes stored in the ECM match compensation codes of the installed injectors.
OK
REPLACE ECM
NG
4.REGISTER INJECTOR COMPENSATION CODE

Input the injector compensation codes .

  • OK:
  • Input of the injector compensation code is completed.
NG
REPLACE ECM
OK
5.CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.

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

Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs.

  • Result:
  • Display (DTC Output)Proceed to
    P1601A
    No DTC outputB
A
REPLACE ECM
B
END
6.CHECK CATALYST RECORD OF DPNR THERMAL DETERIORATION

Read the catalyst record of DPNR thermal deterioration .

Set the catalyst record of DPNR thermal deterioration .

  • OK:
  • Both reading and setting are completed.
NG
REPLACE ECM AND EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
OK
7.CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.

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

Enter the following menus: Powertrain / Engine / DTC.

Read the DTCs.

  • Result:
  • Display (DTC Output)Proceed to
    P1601A
    No DTC outputB
A
REPLACE ECM AND EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
B
END