Mitsubishi Lancer (4A9 engine). Manual — part 108
HEADLAMP
CHASSIS ELECTRICAL
54A-94
DIAGNOSTIC FUNCTION
When the left wiring harness of turn-signal lamp is
short circuited, the ETACS-ECU sets diagnosis code
No. B16A3.
JUDGEMENT CRITERIA
With the diagnosis code not set, when the short cir-
cuit is detected three times consecutively, the
ETACS-ECU sets the diagnosis code No. B16A3.
PROBABLE CAUSES
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. 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 2.
NO :
Repair the defective connector.
STEP 2. Connector check: C-304 and C-311
ETACS-ECU connectors
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
STEP 3. 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 short circuit.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the wiring harness.
STEP 4. 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 ).
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-95
Code No.B16A4 Blown turn-signal lamp (RH) bulb
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
DIAGNOSTIC FUNCTION
When the right bulb of turn-signal lamp is blown, the
ETACS-ECU sets diagnosis code No. B16A4.
JUDGEMENT CRITERIA
The ETACS-ECU sets diagnosis code No. B16A4
under the following conditions.
i. With the diagnosis code not set, if there is a mal-
function to the right turn-signal lamp bulb, the
blown right bulb counter counts once when the
illumination of hazard or turn-signal lamp (right
side) is attempted.
ii. If the blown right bulb counter reaches "3," the
diagnosis code No. B16A4 is set.
PROBABLE CAUSES
• Malfunction of turn-signal lamp bulb (right side)
• 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-53 headlamp
assembly (RH) connector, A-02 side turn-signal
lamp (RH) connector and F-08 <LANCER> or F-45
<LANCER SPORTBACK> rear turn-signal lamp
(RH) connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
ACA00916
A-53 (B)
Connectors: A-02, A-53
AI
A-02 (B)
ACA00886
BC
Connectors: C-304, C-311 <LHD>
ETACS-ECU
C-304
C-311
ACA00887
BD
Connectors: C-304, C-311 <RHD>
ETACS-ECU
C-304
C-311
AC612744 BK
Connector: F-08 <LANCER>
AC801775BR
Connector: F-45 <LANCER SPORTBACK>
HEADLAMP
CHASSIS ELECTRICAL
54A-96
STEP 3. Resistance measurement at the A-53
headlamp assembly (RH) connector, A-02 side
turn-signal lamp (RH) connector and F-08
<LANCER> or F-45 <LANCER SPORTBACK> rear
turn-signal lamp (RH) 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-53
headlamp assembly (RH) connector terminal
No. 6 and the body earth.
• Measure the resistance between the A-02
side turn-signal lamp (RH) connector terminal
No. 1 and the body earth.
• Measure the resistance between the F-08
<LANCER> or F-45 <LANCER SPORT-
BACK> rear turn-signal lamp (RH) 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.
STEP 4. Check the wiring harness between A-53
headlamp assembly (RH) connector terminal No.
6, A-02 side turn-signal lamp (RH) connector
terminal No. 1 or F-08 <LANCER> or F-45
<LANCER SPORTBACK> rear turn-signal lamp
(RH) 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. Check the wiring harness between A-53
headlamp assembly (RH) connector terminal No.
3, A-02 side turn-signal lamp (RH) connector
terminal No. 2 or F-08 <LANCER> or F-45
<LANCER SPORTBACK> rear turn-signal lamp
(RH) connector terminal No. 2 and C-304 ETACS-
ECU connector terminal No. 16 or C-311 ETACS-
ECU connector terminal No. 19.
NOTE: Before the wiring harness check, check the
intermittent connector D-12, and repair them if nec-
essary.
• 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.B16A5 Turn-signal lamp (RH) 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-53 (B)
Connectors: A-02, A-53
AI
A-02 (B)
HEADLAMP
CHASSIS ELECTRICAL
54A-97
DIAGNOSTIC FUNCTION
When the right wiring harness of turn-signal lamp is
short circuited, the ETACS-ECU sets the diagnosis
code No. B16A5.
JUDGEMENT CRITERIA
With the diagnosis code not set, when the short cir-
cuit is detected three times consecutively, the
ETACS-ECU sets the diagnosis code No. B16A5.
PROBABLE CAUSES
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-53 headlamp
assembly (RH) connector, A-02 side turn-signal
lamp (RH) connector and F-08 <LANCER> or F-45
<LANCER SPORTBACK> rear turn-signal lamp
(RH) connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
STEP 2. Connector check: C-304 and C-311
ETACS-ECU connectors
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
STEP 3. Check the wiring harness between A-53
headlamp assembly (RH) connector terminal No.
3, A-02 side turn-signal lamp (RH) connector
terminal No. 2 or F-08 <LANCER> or F-45
<LANCER SPORTBACK> rear turn-signal lamp
(RH) connector terminal No. 2 and C-304 ETACS-
ECU connector terminal No. 16 or C-311 ETACS-
ECU connector terminal No. 19.
NOTE: Before the wiring harness check, check the
intermittent connector D-12, and repair them if nec-
essary.
• Check the output lines for short circuit.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the wiring harness.
STEP 4. 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 ).
ACA00886
BC
Connectors: C-304, C-311 <LHD>
ETACS-ECU
C-304
C-311
ACA00887
BD
Connectors: C-304, C-311 <RHD>
ETACS-ECU
C-304
C-311
AC612744 BK
Connector: F-08 <LANCER>
AC801775BR
Connector: F-45 <LANCER SPORTBACK>
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