Mitsubishi Grandis. Manual - part 11
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-41
COMMENTS ON TROUBLE SYMPTOM
The front-ECU, the ETACS-ECU, connector(s), or
wiring harness between the two may be defective.
POSSIBLE CAUSES
• Malfunction of the front-ECU
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
Step 2. MUT-III diagnosis code
(1) Ignition switch: ON
(2) On completion, check that diagnosis code No.03
is not reset.
Q: Is diagnosis code No.03 set?
YES :
Go to Step 6.
NO :
Go to Step 3.
Step 3. Connector check: A-14X front-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
Step 4. Voltage measurement at A-14X front-ECU
connector.
(1) Remove the front-ECU, and measure at the relay
box side.
(2) Voltage between A-14X front-ECU connector
terminal No.7 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Replace the front-ECU.
NO :
Go to Step 5.
Step 5. Check the wiring harness between A-14X
front-ECU connector terminal No.7 and the
fusible link (26).
• Check the power supply line for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
AC311521AB
Connector: A-14X
Relay box side
AC311521AB
Connector: A-14X
Relay box side
AC301541
AC301541IF
Connector A-11X
(Relay box side)
AC311521AB
Connector: A-14X
Relay box side