Mitsubishi Lancer (4A9 engine). Manual — part 107
HEADLAMP
CHASSIS ELECTRICAL
54A-90
SYMPTOM CHART
NOTE:
.
1. The numbers indicate the sequence in which the
component is checked.
2. For the troubleshooting of other than the above,
refer to Trouble Symptom Chart .
3. If ETACS-ECU fails, only the low-beam head-
lamps will illuminate as a fail-safe measure.
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING
M1540104200305
Refer to GROUP 00
− Contents of troubleshooting .
DIAGNOSIS FUNCTION
M1540104300380
HOW TO READ DIAGNOSIS CODE
Refer to GROUP 00
− Diagnosis function .
HOW TO ERASE DIAGNOSIS CODE
Refer to GROUP 00
− Diagnosis function .
AFS WARNING LAMP AND AFS WARN-
ING DISPLAY
DIAGNOSIS CODE CHART
M1540101400548
CAUTION
On troubleshooting, if the ignition switch is turned ON while disconnecting connector(s), diagnosis
code(s) associated with other system may be set. On completion, confirm all systems for diagnosis
code(s). If diagnosis code(s) are set, erase them all.
ETACS-ECU
Item to be checked
Trouble symptom
The headlamps do not
illuminate.
The headlamps flicker.
The headlamps are dim.
Fuse
1
−
−
Wiring harness and
connector
2
1
−
Column switch
3
−
−
Bulb
4
2
1
Controller
5
3
2
ETACS-ECU
6
4
−
Parts name
Functional description
Combination
meter (AFS
warning lamp)
When an AFS abnormality
occurs, the AFS warning lamp
flashes to inform the driver of the
AFS abnormality.
Combination
meter (AFS
warning display)
When an AFS abnormality
occurs, indicates the warnings
on the multi-information display
of combination meter to inform
the driver of the AFS
abnormality.
SERVICE
REQUIRED
AC809280
SERVICE
REQUIRED
AC809280
AFS warning
display
AFS warning
lamp
AC
Diagnosis code No.
Diagnostic item
Reference page
B16A2
Blown turn-signal lamp (LH) bulb
HEADLAMP
CHASSIS ELECTRICAL
54A-91
LIN <VEHICLES WITH LIGHTING CONTROL SEN-
SOR>
NOTE: *: Rain light sensor (Lighting control sensor)
HEADLAMP AUTOMATIC LEVELLING-ECU
DIAGNOSIS CODE PROCEDURES
Code No.B16A2 Blown turn-signal lamp (LH) bulb
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
B16A3
Turn-signal lamp (LH) short circuit
B16A4
Blown turn-signal lamp (RH) bulb
B16A5
Turn-signal lamp (RH) short circuit
Diagnosis code No.
Diagnostic item
Reference page
Diagnosis code No.
Diagnostic item
Reference page
L0432
RLS* RS adaptation error
L0434
RLS* light sensor error
L0436
RLS* rain sensor error
Diagnosis code No.
Diagnostic item
Reference page
B2358
AFS OFF SW short circuit
B2507
Steering wheel sensor error
B2509
Steering wheel sensor not initialized
B2511
ECU internal error (ROM)
B2512
ECU internal error (EEPROM)
U0001
Bus-off (CAN-C)
U0100
Engine CAN time-out
U0121
ASC/ABS CAN time-out
U0126
Steering wheel sensor CAN time-out
U0141
ETACS CAN time-out
U1415
Coding not completed/failed
U1417
Abnormality in coding data
ACA00916
A-09 (B)
Connectors: A-09, A-35
AH
A-35 (B)
ACA00886
BC
Connectors: C-304, C-311 <LHD>
ETACS-ECU
C-304
C-311
HEADLAMP
CHASSIS ELECTRICAL
54A-92
DIAGNOSTIC FUNCTION
When the left bulb of turn-signal lamp is blown, the
ETACS-ECU sets diagnosis code No. B16A2.
JUDGEMENT CRITERIA
The ETACS-ECU sets diagnosis code No. B16A2
under the following conditions.
i. With the diagnosis code not set, if there is a mal-
function to the left turn-signal lamp bulb, the
blown left bulb counter counts once when the illu-
mination of hazard or turn-signal lamp (left side)
is attempted.
ii. If the blown left bulb counter reaches "3," diagno-
sis code No. B16A2 is set.
PROBABLE CAUSES
• Malfunction of turn-signal lamp bulb (left)
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Bulb check
Check whether the bulb of turn-signal lamp which
does not illuminate is normal.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Replace the bulb of turn-signal lamp which
does not illuminate.
STEP 2. Connector check: A-35 headlamp
assembly (LH) connector, A-09 side turn-signal
lamp (LH) connector and F-23 <LANCER> or F-49
<LANCER SPORTBACK> rear turn-signal lamp
(LH) connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
STEP 3. Resistance measurement at the A-35
front combination lamp (LH) connector, A-09 side
turn-signal lamp (LH) connector and F-23
<LANCER> or F-49 <LANCER SPORTBACK> rear
turn-signal lamp (LH) connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between the connector
terminal of lamp which does not illuminate and
the body earth.
• Measure the resistance between the A-35
headlamp assembly (LH) connector terminal
No. 6 and the body earth.
• Measure the resistance between the A-09
side turn-signal lamp (LH) connector terminal
No. 1 and the body earth.
• Measure the resistance between the F-23
<LANCER> or F-49 <LANCER SPORT-
BACK> rear turn-signal lamp (LH) connector
terminal No. 1 and the body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
ACA00887
BD
Connectors: C-304, C-311 <RHD>
ETACS-ECU
C-304
C-311
AC612744 BJ
Connector: F-23 <LANCER>
AC801775BQ
Connector: F-49 <LANCER SPORTBACK>
HEADLAMP
CHASSIS ELECTRICAL
54A-93
STEP 4. Wiring harness check between A-35
headlamp assembly (LH) connector terminal No.
6, A-09 side turn-signal lamp (LH) connector
terminal No. 1 or F-23 <LANCER> or F-49
<LANCER SPORTBACK> rear turn-signal lamp
(LH) connector terminal No. 1 and the body earth
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
STEP 5. Connector check: C-304 and C-311
ETACS-ECU connectors
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
STEP 6. Wiring harnesses check between A-35
headlamp assembly (LH) connector terminal No.
3, A-09 side turn-signal lamp (LH) connector
terminal No. 2 or F-23 <LANCER> or F-49
<LANCER SPORTBACK> rear turn-signal lamp
(LH) connector terminal No. 2 and C-304 ETACS-
ECU connector terminal No. 9 or C-311 ETACS-
ECU connector terminal No. 18
NOTE: Before the wiring harness check, check the
intermittent connector D-16, and then repair that if
necessary.
• Check the output lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
STEP 7. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the ETACS-ECU.
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
Code No.B16A3 Turn-signal lamp (LH) short circuit
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
ACA00916
A-09 (B)
Connectors: A-09, A-35
AH
A-35 (B)
ACA00886
BC
Connectors: C-304, C-311 <LHD>
ETACS-ECU
C-304
C-311
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