СИСТЕМА ECD, Diagnostic DTC:32 (1)

DTC Code DTC Name
32 (1) 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 (1)

  • When ignition switch is turned ON, or when ECM determines if there is error in RAM of ECM, ECM conducts single communication. If one of following conditions occurs in single communication, ECM conducts another communication. While ECM is conducting communication, ECM detects DTC 32 (1) if (a) occurs 20 times continuously, (b) occurs 20 times continuously, or (c) occurs 2 times continuously.

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

  • (b) Data sent from injection pump correction unit does not match data received in ECM.

  • (c) Data received from pump ROM is not input for 1024 msec.

    Tech Tips

    Even when determining process is completed normally, if undefined code is found while checking identification code of data received, ECM conducts communication again. If undefined code occurs 20 times continuously, ECM detects DTC 32 (1).

  • Open or short in injection pump correction unit circuit

  • Injection pump correction unit

  • ECM

WIRING DIAGRAM

A01E15DE01

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01E12ME02

      Disconnect the I13 injection pump correction unit connector.

    2. Disconnect the E22 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      I13-1 (DATA) - E22-6 (DATA) Below 1 Ω
      CLK (I13-4) - CLK (E22-14) Below 1 Ω
      E22-6 (DATA) - Body ground 10 kΩ or higher
      E22-14 (CLK) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  2. REPLACE INJECTION PUMP ASSEMBLY


    NEXT

  3. CHECK DTC OUTPUT (DTC 32 (1) 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 (1) is output again A
      No DTC output B

    B

    SYSTEM OK

    A

    REPLACE ECM