Toyota Celica 2005, Руководство по ремонту

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− DIAGNOSTICS ENGINE (2ZZ − GE)
DI − 569
2005 CELICA (RM1131U)
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
MONITOR DESCRIPTION
The ECM continuously monitors its internal memory status, internal circuits, and output signals to the throttle
actuator. This self
− check ensures that the ECM is functioning properly. If any malfunction is 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
RAM (Random Access Memory) errors. The two CPUs also perform continuous mutual monitoring.
The ECM sets a DTC if: 1) outputs from the 2 CPUs are different and deviate from the standards, 2) the sig-
nals to the throttle actuator deviate from the standards, 3) a malfunction is found in the throttle actuator sup-
ply voltage, and 4) any other ECM malfunction is found.
DTC No. DTC Detecting Condition Trouble Area
P0604
P0606
P0607
P0657
ECM malfunction S ECM
MONITOR STRATEGY
Related DTCs
P0604
RAM (Random Access Memory) error range
check
P0606
TP (Throttle position) and APP (Accel pedal posi-
tion) sensor circuit in ECM
P0607 ECM range check
P0657
ETCS (Electrical throttle control) power supply
circuit in ECM
Required sensors/components ECM
Frequency of operation Continuous
Duration 1 sec.
MIL operation Immediate
Sequence of operation None
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these
DTCs are not present
See page DI − 295
The typical enabling condition is not avail-
able
−
DI3IK − 11
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