ENGINE CONTROL SYSTEM 3-41
CONDITION FOR SELF-DIAGNOSTIC SYSTEM OPERATION
FAILED ITEM CONDITION
MAP sensor 1 • No signal (With engine running)
• Receiving an out of range “37 – 860 mmHg (1.46 – 33.86 inHg)
(0.50 – 4.84 V)” signal (With engine running)
IAC valve/By-pass air screw
adjustment
• IAC valve operates at 80% duty or higher when ECM receives fully
closed position signal from throttle position sensor.
[NOTE 1]
Cylinder temp. sensor • No signal
• Receiving an out of range “– 46 to +170 °C (– 114.8 – +338 °F)
(0.10 – 4.6 V)” signal
IAT sensor • No signal
• Receiving an out of range “– 46 to +169 °C (– 114.8 – +336.2 °F)
(0.10 – 4.6 V)” signal
CKP sensor • During one crankshaft rotation, 34 signals are not input to ECM.
CMP sensor • During two crankshaft rotation, 4 signals are not input to the ECM.
Air intake system • During the ECM’s receiving input of the complete close signal from the
throttle position sensor, the engine operates at an abnormally high
speed. (Criterion: 2 500 r/min MIN)
MAP sensor 2
(Pressure detect passage)
• Receiving unchanging signal regardless engine speed change.
[NOTE 2]
Rectifier & Regulator.
(Over-charging)
• Receiving 16 volts or higher signal
Exhaust manifold temp. sensor
(PORT or STBD)
• No signal
• Receiving an out of range “– 46 to +170 °C (– 114.8 – +338 °F)
(0.10 – 4.6 V)” signal
Fuel injector • No operation signal from the ECM
Throttle position sensor • No signal
Shift position sensor • No signal
CMP sensor
(VVT PORT or STBD)
• During two crankshaft rotation, 4 signals are not input to ECM.
VVT advance
(PORT or STBD)
• There is a large difference between the target advance angle and the
actual advance angle.
Neutral switch • While the shift sensor outputs the forward or reverse signal, the ECM
receives input of the neutral signal from the neutral switch.
Model discrimination • There is discrepancy of signal between the ECM memory storage and
the model discrimination terminal.
• [No.13 terminal open. (DF200)]
• [No.13 terminal short circuit. (DF225/250)]
Oil control valve
(PORT or STBD)
• OCV not operating.