INSPECTION CHART FOR TROUBLE SYMPTOMS



Item
Trouble Symptom
Inspection Procedure No.
Communication with M.U.T.-III is impossible
Communication between M.U.T.-III and engine-ECU is not possible.
1
Engine warning lamp
The engine warning lamp does not illuminate right after the power supply mode of the electric motor switch is ACC.
2
The engine warning lamp remains illuminating and never goes out.
3
Starting
Starting impossible (initial combustion but no complete combustion)
Initial combustion occurs, but the engine stalls soon due to the incomplete combustion.
4
Improper starting (long time to start)
The engine starts, but it takes too long for cranking.
Driving
Knocking
Sharp sound like a hammer striking on the cylinder walls during the driving can be heard and wrongly affects the driving.
5
Ignition timing deviation
The basic ignition timing is deviated from the datum value.
6
Stopping
Run on (dieseling)
The engine continues to run after the power supply mode of the electric motor switch is OFF.
7
Exhaust gas
Odour, white smoke, black smoke and high-concentration CO/HC.
The exhaust has an abnormal odour. Either white or black exhaust gas comes out. The concentration of CO & HC is high.
8
Cooling performance
Overheating
The temperature of engine cooling water is extremely high.
9

PROBLEM SYMPTOMS TABLE


warning When touching the throttle valve, surely shut off the driving circuits of the throttle valve. In the event that the throttle valve is operated, a finger might be injured as the result of being caught by the throttle valve.
caution During troubleshooting if the power supply mode of the electric motor switch is ON with the connectors, etc. disconnected, some diagnosis code may be saved in other system. After the troubleshooting is completed, always make sure the diagnosis codes of the entire systems. If it is found that some diagnosis codes have been stored, erase them.
Inspection Procedure No.
Inspection Item
Reference Page
1
Communication with engine-ECU is not possible

2
The engine warning lamp does not illuminate right after the power supply mode of the electric motor switch is ACC

3
The engine warning lamp remains illuminating and never goes out

4
Starting impossible (initial combustion but no complete combustion)

Improper starting (long time to start)
5
Knocking

6
Ignition timing deviation

7
Run on (dieseling)

8
Odour, white smoke, black smoke and high-concentration CO/HC

9
Overheating

10
Engine-ECU power supply, engine control relay, ignition switch-IG1 system

11
Fuel pump system

12
Ignition circuit system

13
Oil pressure switch system