Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
1Az-Fe Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0604, P0606, P0607 OR P0657)
DTC P0604 Internal Control Module Random Access Memory (RAM) Error |
DTC P0606 ECM / PCM Processor |
DTC P0607 Control Module 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 sets the appropriate DTC and illuminate the MIL.The ECM memory status is diagnosed by internal "mirroring" of the main CPU and the sub CPU to detect Random Access Memory (RAM) errors. The 2 CPU also perform continuous mutual monitoring. The ECM illuminates the MIL and set a DTC if: 1) outputs from the 2 CPUs are different or deviate from the standards, 2) the signals sent to the throttle actuator deviate from the standards, 3) a malfunction is found in the throttle actuator supply voltage, and 4) any other ECM malfunction is found.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0604 P0606 P0607 P0657 | ECM internal error (1 trip detection logic) | ECM |
INSPECTION PROCEDURE
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0604, P0606, P0607 OR P0657) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and turn the tester ON.
Select the following menu items: Powertrain / Engine and ECT / DTC.
Read the DTC.
- Result:
Display (DTC output) Proceed to P0604, P0606, P0607 or P0657 A P0604, P0606, P0607 or P0657 and other DTCs B
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| A | ||
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