Mitsubishi Lancer (4A9 engine). Manual - part 126

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-166

Tool

Number

Name

Use

MB990784

Ornament 
remover

Removal of rear combination lamp 
assembly and tail lamp assembly

MB990784

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-167

MB991955

a. MB991824
b. MB991827
c. MB991910
d. MB991911
e. MB991825
f. MB991826

M.U.T.-III sub-
assembly

a. Vehicle 

Communicatio
n Interface 
(V.C.I.)

b. M.U.T.-III USB 

cable

c. M.U.T.-III main 

harness A 
(Vehicles with 
CAN 
communication 
system)

d. M.U.T.-III main 

harness B 
(Vehicles 
without CAN 
communication 
system)

e. M.U.T.-III 

measure 
adapter

f. M.U.T.-III 

trigger harness

CAUTION

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send simulated 
vehicle speed. If you connect 
M.U.T.-III main harness B instead, 
the CAN communication does not 
function correctly.
Diagnosis code, service data and 
actuator test check.

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Check harness
b. LED harness
c. LED harness 

adapter

d. Probe

Continuity check and voltage 
measurement at harness wire or 
connector

a. For checking connector pin 

contact pressure

b. For checking power supply circuit
c. For checking power supply circuit
d. For connecting a locally sourced 

tester

Tool

Number

Name

Use

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991223

a

d

c

b

DO NOT USE

BA

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-168

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC 
TROUBLESHOOTING

M1541402500133

Refer to GROUP 00 

− Contents of troubleshooting .

DIAGNOSIS FUNCTION

M1541400900083

HOW TO READ DIAGNOSIS CODE

Refer to GROUP 00 

− Diagnosis function .

HOW TO ERASE DIAGNOSIS CODE

Refer to GROUP 00 

− Diagnosis function .

DIAGNOSIS CODE CHART

M1541400200192

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.

DIAGNOSIS CODE PROCEDURES

Code No.B16A7 Tail lamp (RH) circuit short <Short circuit in the position lamp (RH) circuit or the tail 
lamp (RH) circuit>

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

Tool

Number

Name

Use

MB992006

Diagnosis code No.

Diagnostic item

Reference page

B16A7

Tail lamp (RH) circuit short <Short circuit in the 
position lamp (RH) circuit or the tail lamp (RH) 
circuit>

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

A-53 (B)

Connector: A-53

AE

ACA00886

BC

Connectors: C-304, C-311 <LHD>

ETACS-ECU

C-304

C-311

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-169

DIAGNOSTIC FUNCTION
When a short circuit is detected in the position lamp 
circuit or the tail lamp circuit, the ETACS-ECU sets 
the diagnosis code No. B16A7.

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. B16A7 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-53 headlamp 
assembly (RH) connector, F-08 rear combination 
lamp (RH) connector and F-09 tail lamp (RH) 
<LANCER> connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO  : 

Repair the defective connector.

STEP 3. Resistance measurement at the A-53 
headlamp assembly (RH) connector, F-08 rear 
combination lamp (RH) connector and F-09 tail 
lamp (RH) <LANCER> 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 F-08 

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

• Measure the resistance between the F-09 tail 

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

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

ACA00901AE

F-08

F-09 (GR)

Connectors: F-08, F-09 <LANCER>

AC801775BV

Connector: F-08 <LANCER SPOTBACK>