COMMON RAIL SYSTEM
07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1-S27
4. DIAGNOSIS BY MALFUNCTION SYMPTOM
[1] LIST OF MALFUNCTION CAUSES BY SYMPTOM
• Verify the malfunction symptom, and perform diagnosis according to the appropriate number.
• Many diagnostic procedures include check and verification of malfunction symptom while it occurs. Be sure to
perform work while verifying the malfunction symptom.
9Y3200007CRS0021US0
No. Malfunction Symptom Detail
1 Engine Warning Light Comes On. –
2 Engine Does Not Start.
Engine does not crank (starter motor does not
rotate).
Engine stops when the key switch returns to the ON
position from the ST position (engine does not rotate
under its own power).
3 Takes A Long Time Before Engine Starts.
Takes a long time before engine starts.
May accompany idle failure.
4 Idle Failure
Idle speed is lower than the standard value or
unstable.
Engine may stall.
5 Engine Noise
Abnormal noises come from inside the engine.
Engine sound is loud.
6 High Fuel Consumption Fuel consumption has increased significantly.
7 Poor Acceleration (Insufficient Output)
Acceleration is slower than before when depressing
the accelerator pedal.
Power feels insufficient compared with previously.
Large amount of rotation drop.
8 Black Smoke Emitted.
The amount of black smoke in the exhaust gas has
increased abnormally compared with previously.
9 White Smoke Emitted.
The amount of white smoke in the exhaust gas has
increased abnormally compared with previously.
10 Engine Stalls On Deceleration.
Engine speed drops when releasing the accelerator
pedal.
Engine stalls on deceleration with the accelerator
pedal fully closed.
Engine stalls immediately after the machine stops
when decelerating with the accelerator pedal fully
closed.
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