CHECK FOR ANY OTHER DTCS OUTPUT
DTC P0604 Random Access Memory (RAM) |
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 |
DTC P1607 Cruise Control Input Processor |
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 found in the throttle actuator supply voltage, and 4) any other ECM malfunction is found.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0604 P0606 P060A P060B P060D P060E P0657 P1607 | ECM internal error (1 trip detection logic) | ECM |
INSPECTION PROCEDURE
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 FOR ANY OTHER DTCS OUTPUT |
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Clear the DTCs.
Turn the engine switch off and turn the GTS off.
Disconnect the GTS.
Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
Connect the cable to the negative (-) battery terminal.
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
| Result | Proceed to |
| DTC P0604, P0606, P060A, P060B, P060D, P060E, P0657 and/or P1607 are output | A |
| DTC P0604, P0606, P060A, P060B, P060D, P060E, P0657, P1607 and other DTCs are output | B |
| No DTC is output | C |
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| A | ||
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