Mitsubishi Grandis. Manual - part 78
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-309
DIAGNOSIS PROCEDURE
Step 1. Check that the headlamps operate.
Do the low-beam headlamps illuminate when the
lighting switch is turned to the HEAD position?
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
First, repair the headlamps. Refer to
Inspection Procedure M-2 "The low-beam
headlamps do not illuminate normally
Step 2. Check the power supply circuit.
When the ignition switch is turned to the LOCK
(OFF) position, check if the hazard warning lamps
illuminate.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to inspection procedure A-2 "Check
the ETACS-ECU battery power supply
circuit"
.
Step 3. Pulse check
Check the input signals below, which are related to
the daytime running lamp function.
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Refer to inspection procedure Q-2 "The
ignition switch (IG1) signal is not received
Step 4. Connector check: C-221 ETACS-ECU
connector.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
Step 5. Resistance measurement at the C-221
ETACS-ECU connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Check the resistance between the ETACS-ECU
connector and body earth.
• Resistance between C-221 ETACS-ECU
connector terminal No.64 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Replace the ETACS-ECU.
NO :
Go to Step 6.
Step 6. Check the wiring harness from C-221
ETACS-ECU connector terminal No.64 to body
earth.
NOTE: Prior to the wiring harness inspection, check
jumper connector C-101, and repair if necessary.
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
Replace the ETACS-ECU.
NO :
Repair the wiring harness.
System switch
Check condition
Ignition switch (IG1)
When turned from ACC
to ON