СИСТЕМА ECD, Diagnostic DTC:32

DTC Code DTC Name
32 Injection Pump System Malfunction

DESCRIPTION

To compensate for the change in injection volume and injection timing caused by the variance in the injection pump itself, a correction is made by using the data that is stored in the ROM in the fuel pump correction unit.

DTC No. DTC Detection Condition Trouble Area
32

When the ignition switch was turned on, or when ECM determines whether it is an error of RAM in ECM or not, ECM conducts a single communication. And if any one of the following status occurs in the communication, ECM conducts one more communication. While ECM is conducting the communication, if (a) is duplicated 20 times continuously, or if (b) is duplicated 20 times continuously, or if (c) is duplicated 2 times continuously, ECM detects the DTC code 32.

(a) There was a communication error when receiving data.

(b) Sending data from the injection pump correction unit does not match to the receiving data from ECM.

(c) Receiving data from the pump ROM does not be input in the period of 1024 ms.

Although the determining process is completed without a problem, ECM conducts the communication again if an undefined code is found while checking an identification code of the receiving data. If the undefined code was duplicated 20 times in a row, ECM can detect the DTC code.

  • Open or short injection pump correction unit circuit

  • Injection pump correction unit

  • ECM

WIRING DIAGRAM

A01BBXKE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECM - INJECTION PUMP CORRECTION UNIT)


    1. A01BBDBE01

      Disconnect the injection pump correction unit connector.

    2. Disconnect the ECM D4 connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      DATA (D60-1) - DATA (D4-6) Below 1 Ω
      CLK (D60-4) - CLK (D4-14) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      DATA (D4-6) - Body ground 10 kΩ or higher
      CLK (D4-14) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. REPLACE INJECTION PUMP ASSEMBLY


    NEXT

  3. READ OUTPUT DTC (DTC 32 IS OUTPUT AGAIN)


    1. Clear the DTC Click here.

    2. Turn the ignition switch ON.

    3. Check the DTC Click here.

      Result
      Display (DTC output) Proceed to
      DTC 32 is output again A
      No DTC output B

    B

    SYSTEM OK

    A

    REPLACE ECM