Dtc P0604 Internal Control Module Random Access Memory (Ram) Error

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fbe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

INSPECTION PROCEDURE

CHECK WHETHER DTC OUTPUT RECURS

DTC P0604 Internal Control Module Random Access Memory (RAM) Error

DTC P0606 ECM / PCM Processor

DTC P060A Internal Control Module Monitoring Processor Performance

DTC P060B Internal Control Module A/D Processing Performance

DTC P060D Internal Control Module Accelerator Pedal Position Performance

DTC P060E Internal Control Module Throttle Position Performance

DTC P0657 Actuator Supply Voltage Circuit / Open


DESCRIPTION

The ECM continuously monitors its internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check ensures that the ECM is functioning properly. If any malfunction is detected, the ECM stores the appropriate DTC and illuminates the MIL.
The ECM memory status is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect Random Access Memory (RAM) errors. The 2 CPUs also perform continuous mutual monitoring. The ECM illuminates the MIL and stores a DTC if: 1) outputs from the 2 CPUs are different or deviate from the standard, 2) the signals sent to the throttle actuator deviate from the standard, 3) a malfunction is detected in the throttle actuator supply voltage, or 4) any other ECM malfunction is detected.

DTC No.
DTC Detection Condition
Trouble Area
P0604
P0606
P060A
P060B
P060D
P060E
P0657
ECM internal error (1 trip detection logic).
ECM

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P0604, P0606, P060A, P060B, P060D, P060E and/or P0657 is output
    		A
    DTC is not output
    		B



B
CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0Q4X.html)
A

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)