Mitsubishi Lancer (4A9 engine). Manual — part 115
HEADLAMP
CHASSIS ELECTRICAL
54A-122
STEP 2. M.U.T.-III data list
Using the ETACS-ECU service data, check the sig-
nals related to the illumination of turn-signal lamp.
• Turn the ignition switch to the ON position.
• Turn the turn-signal lamp switch to the left posi-
tion.
• Turn the turn-signal lamp switch to the right posi-
tion.
OK: Normal conditions are displayed for all
the items.
Q: Is the check result normal?
Normal conditions are displayed for all the items. :
Go to Step 3.
Normal condition is not displayed for item No. 254.
:
Troubleshoot the ETACS-ECU. Refer to
Inspection Procedure 2 "The ignition switch
(IG1) signal is not received" .
Normal condition is not displayed for item No. 343
or 344. :
Troubleshoot the ETACS-ECU. Refer to
Inspection Procedure 11 "The column
switch signal is not received" .
STEP 3. Retest the system
Check that the turn-signal lamps illuminate.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Replace the ETACS-ECU.
Inspection Procedure 11: The comfort flashing function does not work normally.
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit, the earth circuit and the
communication circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If the comfort flashing function does not work nor-
mally, the turn-signal lamp switch input circuit(s) and
ETACS-ECU may have a problem.
PROBABLE CAUSES
• Malfunction of column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. ETACS-ECU customise function check
Use the ETACS-ECU customise function to check
that the "Comfort flasher" is set to "Enable."
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Use the ETACS-ECU customise function to
set the "Comfort flasher" to "Enable" (Refer
to ).
STEP 2. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.
Q: Is the diagnosis code set?
YES :
Troubleshoot the ETACS-ECU. Refer to .
NO :
Go to Step 3.
STEP 3. Check that the turn-signal lamps
operate.
Check that the turn-signal lamps work normally when
the ignition switch is in the ON position.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Refer to Inspection Procedure 10 "None of
the turn-signal lamps illuminate" .
STEP 4. Retest the system
Check that the comfort flashing function works nor-
mally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Replace the ETACS-ECU.
Item No.
Item name
Normal
condition
Item 254
IG voltage
System voltage
Item 343
Turn switch left ON
Item No.
Item name
Normal
condition
Item 344
Turn switch
right
ON
HEADLAMP
CHASSIS ELECTRICAL
54A-123
Inspection Procedure 12: The turn-signal indicator lamps do not illuminate.
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit, the earth circuit and the
communication circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If the turn-signal lamp indicator does not illuminate
normally, the harness in the CAN bus lines, connec-
tor(s), ETACS-ECU, or combination meter may have
a problem.
PROBABLE CAUSES
• Malfunction of the ETACS-ECU
• Malfunction of combination meter
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Turn-signal lamp check
Check that the turn-signal lamp flashes normally
when the turn-signal switch is operated.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure 10 "None of
the turn-signal lamps illuminate" .
STEP 2. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the CAN bus line (Refer to GROUP
54C
− Troubleshooting ).
STEP 3. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.
Q: Is the diagnosis code set?
YES :
Troubleshoot the ETACS-ECU. Refer to .
NO :
Go to Step 4.
STEP 4. M.U.T.-III actuator test
Perform the actuator test for the combination meter,
and check that the turn-signal lamp indicator illumi-
nates (Refer to Combination meter ).
Q: Is the check result normal?
YES :
Replace the ETACS-ECU.
NO :
Replace the combination meter.
Inspection Procedure 13: One of the bending lamps does not illuminate.
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit, the earth circuit and the
communication circuit are normal.
AC612144
AC801941
AF
Connector: A-28X
ACA00916
A-53 (B)
Connectors: A-35, A-53
AJ
A-35 (B)
ACA00892
Connector: C-14 <LHD>
AS
HEADLAMP
CHASSIS ELECTRICAL
54A-124
COMMENTS ON TROUBLE SYMPTOM
When one of the bending lamps is not turned ON, the
harness, connector, bulb, or headlamp automatic lev-
elling-ECU may be defective.
PROBABLE CAUSES
• Malfunction of the bending lamp bulbs
• Malfunction of the headlamp automatic levelling-
ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check a trouble spot.
Q: Which bending lamp does not illuminate?
The LH-side does not illuminate. :
Go to Step 2
The RH-side does not illuminate. :
Go to Step 11
STEP 2. Connector check: A-35 headlamp
assembly (LH) connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
STEP 3. Bulb check
Check the bulb(s) of headlamp that does not illumi-
nate.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the bulb(s) of the lamp that does
not illuminate.
STEP 4. Connector check: C-14 headlamp
automatic levelling-ECU connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
STEP 5. Voltage measurement at C-14 headlamp
automatic levelling-ECU connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the ON position.
(3) Turn the lighting switch to the HEAD position.
(4) Turn the steering wheel anticlockwise for 104
° or
more.
(5) Measure the voltage between C-14 headlamp
automatic levelling-ECU connector terminal No. 3
and the body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 6.
STEP 6. Connector check: A-28X headlamp relay
(LO) connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the defective connector.
STEP 7. Wiring harness check between C-14
headlamp automatic levelling-ECU connector
terminal No. 10 and A-28X headlamp relay (LO)
connector terminal No. 3.
• Check the power supply line for open circuit and
short circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Repair the wiring harness.
STEP 8. Resistance measurement at A-35
headlamp assembly (LH) connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between A-35 headlamp
assembly (LH) connector terminal No. 8 and the
body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 9.
ACA00895AR
Connector: C-14 <RHD>
HEADLAMP
CHASSIS ELECTRICAL
54A-125
STEP 9. Wiring harness check between A-35
headlamp assembly (LH) connector terminal No.
8 and body earth
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Repair the wiring harness.
STEP 10. Wiring harness check between C-14
headlamp automatic levelling-ECU connector
terminal No. 3 and A-35 headlamp assembly (LH)
connector terminal No. 7.
• Check the signal line for open circuit and short
circuit.
Q: Is the check result normal?
YES :
Go to Step 20.
NO :
Repair the wiring harness.
STEP 11. Connector check: A-53 headlamp
assembly (RH) connector
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Repair the defective connector.
STEP 12. Bulb check
Check the bulb(s) of headlamp that does not illumi-
nate.
Q: Is the check result normal?
YES :
Go to Step 13.
NO :
Replace the bulb(s) of the lamp that does
not illuminate.
STEP 13. Connector check: C-14 headlamp
automatic levelling-ECU connector
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Repair the defective connector.
STEP 14. Voltage measurement at C-14 headlamp
automatic levelling-ECU connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the ON position.
(3) Turn the lighting switch to the HEAD position.
(4) Turn the steering wheel clockwise for 104
° or
more.
(5) Measure the voltage between C-14 headlamp
automatic levelling-ECU connector terminal No. 1
and the body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 17.
NO :
Go to Step 15.
STEP 15. Connector check: A-28X headlamp
relay (LO) connector
Q: Is the check result normal?
YES :
Go to Step 16.
NO :
Repair the defective connector.
STEP 16. Wiring harness check between C-14
headlamp automatic levelling-ECU connector
terminal No. 11 and A-28X headlamp relay (LO)
connector terminal No. 3.
• Check the power supply line for open circuit and
short circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Repair the wiring harness.
STEP 17. Resistance measurement at A-53
headlamp assembly (RH) connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between A-53 headlamp
assembly (RH) connector terminal No. 8 and the
body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 19.
NO :
Go to Step 18.
STEP 18. Wiring harness check between A-53
headlamp assembly (RH) connector terminal No.
8 and body earth
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Repair the wiring harness.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст