Mitsubishi Lancer (4A9 engine). Manual — part 127

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-170

STEP 4. Wiring harness check between the A-53
headlamp assembly (RH) connector terminal No.
6, F-08 rear combination lamp (RH) connector
terminal No. 1 or F-09 tail lamp (RH) <LANCER>
connector terminal No. 1 and the body earth
NOTE: Prior to the wiring harness inspection, check
intermediate connector F-28, and repair if necessary.

• 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 connector

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the defective connector.

STEP 6. Wiring harness check between the A-53
headlamp assembly (RH) connector terminal No.
4, F-08 rear combination lamp (RH) connector
terminal No. 3 or F-09 tail lamp (RH) <LANCER>
connector terminal No. 2 and C-304 ETACS-ECU
connector terminal No. 7 or C-311 ETACS-ECU
connector terminal No. 13
NOTE: Prior to the wiring harness inspection, check
intermediate connector D-12, D-16 and F-28, and
repair if necessary.

• Check the power supply lines for open circuit and

short 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 diagnosis is complete.

Code No.B16A8 Tail lamp (LH) circuit short <Short circuit in the position lamp (LH) circuit, tail lamp
(LH) circuit or the licence plate lamp circuit>

ACA00916

AF

Connector: A-35

A-35 (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

ACA00901AF

F-23

F-22 (GR)

F-15 (GR)

F-13 (GR)

Connectors: F-13, F-15, F-22, F-23 <LANCER>

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-171

DIAGNOSTIC FUNCTION
When a short circuit is detected in the position lamp
circuit, the tail lamp circuit or the licence plate lamp
circuit, the ETACS-ECU sets the diagnosis code No.
B16A8.

JUDGEMENT CRITERIA
The problem detection of tail lamp is made based on
the digital feed back signal (input signal to ETACS-
ECU) which operates the tail lamp. When the ignition
switch is ON, the ETACS-ECU determines the tail
lamp circuit state from the load placed on the line.
After 100 ms has elapsed since the start of the
check, the ETACS-ECU performs a sampling with
each 10 ms. If an abnormality is detected, it
increases the counter by 2, and when no abnormality
is detected, it decreases the counter by 1. Once the
counter reaches "10," the ETACS-ECU sets the diag-
nosis code No. B16A8 if no load is detected.

PROBABLE CAUSES

• Malfunction of bulbs

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Bulb check
Check the bulb(s) of the lamp that does not illumi-
nate.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Replace the bulb(s) of the lamp that does
not illuminate.

STEP 2. Connector check: A-35 headlamp
assembly (LH) connector, F-23 rear combination
lamp (LH) connector, F-22 tail lamp (LH)
<LANCER> connector, F-15 licence plate lamp
(LH) connector and F-13 licence plate lamp (RH)
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
headlamp assembly (LH) connector, F-23 rear
combination lamp (LH) connector, F-22
<LANCER> tail lamp (LH) connector, F-15 licence
plate lamp (LH) connector and F-13 licence plate
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-35

headlamp assembly (LH) connector terminal
No. 6 and the body earth.

• Measure the resistance between the F-23

rear combination lamp (LH) connector termi-
nal No. 1 and the body earth.

• Measure the resistance between the F-22 tail

lamp (LH) connector terminal No. 1 and the
body earth. <LANCER>

• Measure the resistance between the F-15

licence plate lamp (LH) connector terminal
No. 1 and the body earth.

• Measure the resistance between the F-13

licence plate 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. Wiring harness check between the A-35
headlamp assembly (LH) connector terminal No.
6, F-23 rear combination lamp (LH) connector
terminal No. 1, F-22 tail lamp (LH) <LANCER>
connector terminal No. 1, F-15 licence plate lamp
(LH) connector terminal No. 1 or F-13 licence
plate lamp (RH) connector terminal No. 1 and the
body earth
NOTE: Prior to the wiring harness inspection, check
intermediate connector F-19 and F-28, and repair if
necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair the wiring harness.

AC801775BW

F-13

F-15

F-23

Connectors: F-13, F-15, F-23
<LANCER SPORTBACK>

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-172

STEP 5. Connector check: C-304 and C-311
ETACS-ECU connector

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the defective connector.

STEP 6. Wiring harness check between the A-35
headlamp assembly (LH) connector terminal No.
4, F-23 rear combination lamp (LH) connector
terminal No. 3, F-22 tail lamp (LH) <LANCER>
connector terminal No. 2, F-15 licence plate lamp
(LH) connector terminal No. 2 or F-13 licence
plate lamp (RH) connector terminal No. 2 and C-
304 ETACS-ECU connector terminal No. 3 or C-
311 ETACS-ECU connector terminal No. 10
NOTE: Prior to the wiring harness inspection, check
intermediate connector D-16, F-19, F-28 and F-39,
and repair if necessary.

• Check the power supply lines for open circuit and

short 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 diagnosis is complete.

TROUBLE SYMPTOM CHART

M1541401000254

SYMPTOM PROCEDURES

Inspection Procedure 1: None of the tail lamps illuminate.

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If all the tail lamps do not illuminate normally, the tail
lamp switch input circuit or 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. 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 2.

STEP 2. M.U.T.-III data list
Use the ETACS-ECU service data to check the sig-
nals related to the tail lamp illumination.

• Turn the lighting switch to the "TAIL" position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Troubleshoot the ETACS-ECU. Refer to
Inspection Procedure 11 "The column
switch signal is not received" .

Trouble symptom

Inspection
Procedure No.

Reference page

None of the tail lamps illuminate.

1

Item No.

Item name

Normal
condition

Item 340

Head lamp
switch (tail)

ON

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-173

STEP 3. Retest the system
Check that the tail lamp illuminates normally.

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.

ON-VEHICLE SERVICE

REPLACE THE BULB <LANCER
SPORTBACK>

M1541402100050

STOP/TAIL LAMP BULB REPLACEMENT

1. Remove the rear combination lamp lid.

2.

Remove the connector. Turn and remove the stop/tail

lamp connector.

3. Remove the bulb from the stop/tail lamp connec-

tor.

REAR TURN-SIGNAL LAMP BULB
REPLACEMENT

1. Remove the rear combination lamp lid.

2.

Remove the connector. Turn and remove the rear

turn-signal lamp connector.

3. Remove the bulb from the rear turn-signal lamp

connector.

BACK-UP LAMP BULB REPLACEMENT

1. Remove the tailgate lower trim lid. (Refer to

GROUP 52A

− Tailgate Trim .)

2.

Remove the connector. Turn and remove the back-

up lamp connector.

3. Remove the bulb from the back-up lamp connec-

tor.

AC802163

AB

Stop/tail lamp connector

AC802163

AC

Rear turn-signal lamp connector

AC802162

AB

Back-up lamp
connector