Engine Control System 1A-89
Chart 1 (2/3)
DTC
Fault
CHECK
ENGINE
lamp status
Judgment start conditions
Judgment criteria
Fail-safe
51
ECM Internal Fault
(CPU Error)
ON
(by sub CPU)
—
The sub CPU judges the CPU fail.
—
ECM Internal Fault
(CPU History Error)
—
With the battery voltage 20 V or
more and the starter switch turned
off, the CPU working signals are not
detected even after the initial status
lasts for at least 0.4 second.
Injectors supply pump are stopped.
52
ECM Internal Fault
(CPU Monitoring IC Fault)
ON
—
The post initial status lasts at least 2
seconds, the battery voltage is 22 V
or more, the starter switch is turned
off for at least 0.5 second, and the
CPU working signals are faulty for
0.7 second or more.
Injectors supply pump are stopped.
61
Intake Throttle Valve
System Fault
ON
The starter switch is turned on for at
least 3 seconds, the ITP sensor is in
normal condition, neither #3 - 5 V
Power Supply Fault nor A/D
Conversion Fault is detected, and
the battery voltage stays between
16 V and 32 V.
The valve drive voltage is
excessively high for at least 10
seconds.
—
71
(VIM)
Atmospheric Pressure
Sensor Fault
ON
—
The atmospheric pressure sensor
voltage deviates from the range
between 0.5 V and 4.5 V for 1
second.
81
(VIM)
Clutch Switch System
Fault
ON
—
On the manual transmission vehicle,
the engine is running for at least 180
seconds, the vehicle speed is at
least 80 km/h, and the clutch switch
is not toggled from off to on or on to
off.
The exhaust brake is disabled.
82
(VIM)
Neutral Switch System
Fault
ON
—
The engine is running for at least
180 seconds, the vehicle speed is at
least 80 km/h, and the neutral switch
is toggled from on to off.
The exhaust brake is disabled.
84
CAN Communication Fault
(CAN Bus Error)
ON
—
Fault occurs on communications
with VIM.
Communications with VIM are
terminated and the control mode
with predetermined values will be
dominant.
86
CAN Communication Fault
(CAN Timeout Error)
ON
—
CAN signal is not input for 1
seconds.
Communications with ECM are
terminated and the control mode
with predetermined values will be
dominant.
115
Common Rail Pressure
Sensor Fixed Output Fault
ON
—
The state where the common rail
pressure sensor is in normal
condition, there is no change in
common rail pressure sensor output
voltage, the difference between
desired and actual common rail
pressures is 10 MPa or more, the
actual common rail pressure is 10
MPa or more, and the pump is under
feedback control is continuously
observed 255 times during A/D
conversion in the ECM.
The ECM controls the desired
common rail pressure to 60 MPa or
less and the desired fuel quantity to
50 mm
3
/st or less.
118
Common Rail Pressure
Fault
(First Stage in Control
System)
ON
—
The state where the common rail
pressure is in normal condition and
the actual common rail pressure is
180 MPa or more is continuously
observed 5 times during A/D
conversion in the ECM. (The system
is restored when the common rail
pressure is at or below 130 MPa and
the idle position switch is turned on.)
The ECM controls the desired
common rail pressure to 60 MPa or
less and the desired fuel quantity to
50 mm
3
/st or less.
Common Rail Pressure
Fault
(Second Stage in Control
System)
The state where the common rail
pressure is in normal condition and
the actual common rail pressure is
200 MPa or more is continuously
observed 5 times during A/D
conversion in the ECM. (The system
is restored when the common rail
pressure is at or below 130 MPa and
the engine is stopped.)
Injectors and supply pump are
stopped.
158
Injector Power Supply
System Short (Common 1)
ON
The battery voltage is at least 16 V,
the starter switch is turned on, and
the post injection is not performed.
The short to ground or the +B short
is detected on the common 1 drive
circuits for injectors (injectors #1 and
#3).
The ECM stops injectors #1 and #3.
159
Injector Power Supply
System Short (Common 2)
ON
The battery voltage is at least 16 V,
the starter switch is turned on, and
the post injection is not performed.
The short to ground or the +B short
is detected on the common 2 drive
circuits for injectors (injectors #2 and
#4).
The ECM stops injectors #2 and #4.
211
Fuel Temperature Sensor
System Fault
—
—
The FT sensor output voltage
deviates from the range between 0.1
V and 4.8 V for at least 1 second.
The ECM controls the powertrain
using the set fuel temperature
(normal running phase: 40°C,
startup phase: –20°C).
