Chapter 13 Troubleshooting Procedures; Individual Troubleshooting Procedures - Mitsubishi MOTORS M.U.T.-III Owner's Manual

Chapter 13 Troubleshooting Procedures

13-1. Individual Troubleshooting Procedures

This chapter describes troubleshooting guidelines for the causes of main error messages as well
as error symptoms.
Note:
The messages described herein sometimes appear simultaneously with other screens.
For details regarding circuit inspection, see the electrical wiring diagrams of the applicable
vehicle.
Communications lines are determined by the system and communication method.
For details regarding the diagnosis connector terminal configuration, see the electrical
wiring diagrams of the applicable vehicle.
Message/Symptom
No.
The V.C.I. does not
power up when
1 connected correctly to
the vehicle. Be sure
the IG switch is ON.
The V.C.I. does not
power up from the PC
connection with the
2
USB cable. V.C.I. is
not connected to
vehicle at this time.
The screen
"Maintenance Mode"
3
appears as soon as
the V.C.I. is powered
up.
Individual Troubleshooting Procedures
Cause
Vehicle power supply
failure due to:
V.C.I. switch turned
OFF
Low battery
Vehicle harness not
connected or a short
exists
Hardware error
PC power supply
failure due to:
PC power not
activated
USB cable not
connected or a short
exists
Hardware error
(PC or V.C.I.)
V.C.I. was powered on
with pressing "Esc" key.
121
1. Verify that the V.C.I. switch is ON.
2. Verify the vehicle battery is sufficiently charged
(12V).
3. Disconnect and reconnect the connector.
4. Check if there is a short in the harness. (Try using a
different harness.)
5. If the problem is not resolved by remedies 1-4,
there may be a hardware error. Request inspection
with the harness.
1. Verify that PC is ON.
2. Verify that appropriate USB cable is firmly
connected between the PC and V.C.I. (Do not use a
USB hub.)
3. Disconnect and reconnect the connector.
4. Check if there is a short in the cable. (Try using a
different harness.)
5. If the problem is not resolved by remedies 1-4,
there may be a hardware error. Request inspection
with the PC.
1. Turn the V.C.I. OFF.
2. Disconnect USB cable and connector.
3. Turn the V.C.I. power ON.
(Do not touch "Esc" key.)
4. If the "Main Menu" or "PC Communication" display
does not appear, the V.C.I. may be at fault.
Request inspection.
Remedy