Mitsubishi Lancer (4A9 engine). Manual — part 140

REVERSING SENSOR SYSTEM

CHASSIS ELECTRICAL

54A-222

REVERSING SENSOR SYSTEM

SPECIAL TOOLS

M1540701900147

REVERSING SENSOR SYSTEM

CHASSIS ELECTRICAL

54A-223

Tool

Number

Name

Use

MB991955

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

M.U.T.-III sub-
assembly

a. Vehicle

communication
interface
(V.C.I.)

b. M.U.T.-III USB

cable

c. M.U.T.-III main

harness A (for
vehicles with
CAN
communication
)

d. M.U.T.-III main

harness B (for
vehicles
without CAN
communication
)

e. Measuring

adapter
harness

f. M.U.T.-III

trigger harness

CAUTION

For vehicles with CAN
communication, use M.U.T.-III
main harness A to send the
simulated vehicle speed. If you
connect M.U.T.-III main harness B
instead, CAN communication
does not function correctly.
M.U.T.-III diagnosis code display

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

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

REVERSING SENSOR SYSTEM

CHASSIS ELECTRICAL

54A-224

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING

M1540700600079

Refer to GROUP 00

− Contents of troubleshooting .

DIAGNOSIS FUNCTION

M1540700500038

FAIL-SAFE FUNCTION

1. When the ultrasonic noise is received, the bass

toned buzzer sound continuously. When the ultra-
sonic noise stops, the normal operation will be
resumed immediately.

2. When the abnormality such as the open circuit of

a sensor occurs, the sensor turns OFF and the
high toned buzzer sounds for 5 seconds. When
the normal signal is received, the normal state
will be resumed.

3. When an abnormality occurs in the sensor, the

reversing sensor indicator keeps flashing with
0.8-second interval until the system returns to the
normal condition. However, if the system is
turned OFF by using the switch, the indicator
stops its flashing.

DIAGNOSIS CODE CHART

M1544300700014

CAUTION

During diagnosis, a diagnosis code associated
with other system may be set when the ignition
switch is turned on with connector(s) discon-
nected. On completion, confirm all systems for
diagnosis code(s). If diagnosis code(s) are set,
erase them all.

NOTE: With the troubleshooting indicated with "

*

",

the ON/OFF switch indicator or buzzer sound will not
be activated.

MB992006

Extra fine probe

Continuity check and voltage
measurement at harness wire or
connector

Tool

Number

Name

Use

MB992006

Diagnosis code No.

Diagnosis item

Reference page

B252E

Rear corner sensor (RH) wire disconnection

B2530

Rear corner sensor (LH) wire disconnection

B2532

Back sensor (RH) wire disconnection

B2534

Back sensor (LH) wire disconnection

B252F

Rear corner sensor (RH) error

B2531

Rear corner sensor (LH) error

B2533

Back sensor (RH) error

B2535

Back sensor (LH) error

U0001

Bus off (CAN-C)

U0100

*

Engine-ECU CAN timeout

U0121

*

ASC/ABS-ECU CAN timeout

U0141

*

ETACS-ECU CAN timeout

REVERSING SENSOR SYSTEM

CHASSIS ELECTRICAL

54A-225

DIAGNOSIS CODE PROCEDURES

Code No. B252E Rear corner sensor (RH) wire disconnection

Code No. B2530 Rear corner sensor (LH) wire disconnection

Code No. B2532 Back sensor (RH) wire disconnection

Code No. B2534 Back sensor (LH) wire disconnection

CAUTION

Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the
communication circuit are normal.

Corner Sensor/Back Sensor Circuit

CORNER SENSOR/
BACK SENSOR-ECU

REAR CORNER
SENSOR (LH)

REAR CORNER
SENSOR (RH)

BACK SENSOR
(LH)

BACK SENSOR
(RH)

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

INTERFACE CIRCUIT