Immediate None; 0.3 V Or More - Toyota 2GR-FE Manual

ES–310
DTC
DTC
DTC
DTC
DESCRIPTION
The ECM continuously monitors its internal memory status, internal circuits, and output signals sent to the
throttle actuator. This self-check ensures that the ECM is functioning properly. If any malfunction is
ES
detected, the ECM will set 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 CPUs also perform continuous mutual monitoring. The
ECM illuminates the MIL and sets a DTC if: 1) outputs from the 2 CPUs are different and 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.
P0604
P0606
P0607
P0657
MONITOR STRATEGY
Related DTCs
Required Sensors/Components (Main)
Required Sensors/Components (Sub)
Frequency of Operation
Duration
MIL Operation
Sequence of Operation
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs are not present
TYPICAL MALFUNCTION THRESHOLDS
ECM RAM errors (P0604):
RAM mirror check
ECM CPU range check (P0606):
Either of following conditions is met:
Difference between throttle valve position of main CPU and throttle
valve position of sub CPU
Difference between accelerator pedal position of main CPU and
accelerator pedal position of sub CPU
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
Internal Control Module Random Access Mem-
P0604
ory (RAM) Error
P0606 ECM / PCM Processor
P0607 Control Module Performance
P0657 Actuator Supply Voltage Circuit / Open
DTC Detection Condition
ECM internal error (1 trip detection logic) ECM
P0604: ECM RAM error
P0606: ECM range check
P0607: ECM CPU malfunction
P0657: ETCS power supply
ECM
-
Continuous
Within 1 second
Immediate
None
None
Fail
-

0.3 V or more

0.3 V or more
Trouble Area