Mitsubishi Outlander XL. Manual — part 945

NO:

Repair the wiring harness.

STEP 3. Retest the system

Q:Is the communication between scan tool and SRS-ECU

possible?

YES:

Intermittent malfunction (Refer to GROUP 00, How to

Use Troubleshooting/Inspection Service Points -How to
Cope with Intermittent Malfunction P.00-15.)

NO:

Replace SRS-ECU. (Refer to P.52B-326.)

INSPECTION PROCEDURE 3:The SRS Warning Light does not Illuminate.

M15204000104USA0000010000

CIRCUIT OPERATION

｠

SRS-ECU sends the SRS warning light signal to the
combination meter via the CAN communication.

｠

As a cause, the failure of CAN bus line, combination
meter, or SRS-ECU is suspected.

TROUBLESHOOTING HINTS

｠

Damaged wiring harness and connectors

｠

Combination meter malfunction

｠

Malfunction of SRS-ECU

DIAGNOSIS

STEP 1. Combination meter check
Use scan tool to perform the combination meter actuator tests.

Q:Is the check result normal?

YES:

Replace SRS-ECU. (Refer to P.52B-326.)

NO:

Replace the combination meter (Refer to GROUP 54Ab,

Combination Meter P.54Ab-77).

INSPECTION PROCEDURE 4: The SR SWarning Light does not Go Out.

M15204000105USA0000010000

CIRCUIT OPERATION

｠

SRS-ECU sends the SRS warning light signal to the
combination meter via the CAN communication.

｠

As a cause, the failure of CAN bus line, combination
meter, or SRS-ECU is suspected.

TROUBLESHOOTING HINTS

｠

Damaged wiring harness and connectors

｠

Combination meter malfunction

｠

Malfunction of SRS-ECU

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: Vehicle Communication Interface (V.C.I.)

｠

MB991817: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN Communication System)

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-311

SRS AIR BAG DIAGNOSIS

STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.
Use scan tool MB991958 to diagnose the CAN bus lines.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Turn the ignition switch to the "ON" position.

(3)

Diagnose the CAN bus line.

Q:Is the check result satisfactory?

YES:

Replace the SRS-ECU. (Refer to P.52B-326.)

NO:

Repair the CAN bus line (Refer to GROUP 54D,

Diagnosis P.54D-17).

DATA LIST REFERENCE TABLE

M15204000035USA0000010000

DATA LIST OUTPUT

The following items can be read by the scan tool from
the SRS-ECU input data.

Item No.

Check items

Check conditions

Normal conditions

01

SRS

warning

light

illumination request

｠

Ignition switch: ON

｠

After warning lamp pre-check

OFF

｠

Ignition switch: ON

｠

During warning lamp pre-check

ON

The following items can be read by the scan tool from
the occupant classification-ECU input data.

Item No.

Check items

Check conditions

Normal conditions

01

Passenger weight

Apply a load to the passenger
seat.

-2048 Kg (4515 Ib) to 2048 Kg
(4515 Ib)

02

Dr seat position sensor
current

Slide the seat the back-end to the
front-position.

0 to 4095.93 mA

03

Dr seat position sensor
voltage

Slide the seat the back-end to the
front-position.

0 to 5000 mV

07

Dr seat position sensor
status

Slide the seat the back-end to the
front-position.

Not in Frontal Zone/In Frontal
Zone/Undetermined

08

occupant classification
status

Apply a load to the passenger
seat.

Empty/PFIS/Child/More 5th %/
Undermined

52B-312

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS

Item No.

Check items

Check conditions

Normal conditions

10

Battery voltage

Always

0 to 30 V

21

Pa seat weight sensor 1
RR

Apply a load to the passenger
seat.

-2048 Kg (4515 Ib) to 2048 Kg
(4515 Ib)

22

Pa seat weight sensor 1
RR volt

Apply a load to the passenger
seat.

0 to 5000 mV

23

Pa seat weight sensor 2
RF

Apply a load to the passenger
seat.

-2048 Kg (4515 Ib) to 2048 Kg
(4515 Ib)

24

Pa seat weight sensor 2
RF volt

Apply a load to the passenger
seat.

0 to 5000 mV

25

Pa seat weight sensor 3
LF

Apply a load to the passenger
seat.

-2048 Kg (4515 Ib) to 2048 Kg
(4515 Ib)

26

Pa seat weight sensor 3
LF volt

Apply a load to the passenger
seat.

0 to 5000 mV

27

Pa seat weight sensor 4
LR

Apply a load to the passenger
seat.

-2048 Kg (4515 Ib) to 2048 Kg
(4515 Ib)

28

Pa seat weight sensor 4
LR volt

Apply a load to the passenger
seat.

0 to 5000 mV

30

VIN Information

Always

-

ACTUATOR TEST REFERENCE TABLE

M15204000036USA0000010000

The scan tool activates the following actuators for
testing.

Item No.

Item name

Test item

Driven
component

01

SRS warning light

SRS warning light illumination

ON

FAIL-SAFE FUNCTION

M15204000037USA0000010000

If the SRS-ECU determines that the following parts
are defective, the SRS-ECU operates the SRS
warning light and controls as follows.

｠

If the seat slide sensor is defective, the SRS-ECU
determines that the seat is in its backward position
and controls the air bag.

｠

If the occupant classification sensor or the occupant
classification-ECU is defective, the SRS-ECU
determines that the occupant classification is class
2 [The occupant classification sensor detects 30 kg
(66 pounds) or more.] and controls the air bag and
the passenger’s air bag OFF indicator light.

ACCURACY TESTING OF OCCUPANT CLASSIFICATION SENSOR

M15204000989USA0000010000

The scan tool can be used to perform the next
function.

｠

Seat Weight Sensor Accuacy Check

｠

Zero-calibration

SPECIAL TOOLS

M15204000007USA0000010000

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-313

SRS AIR BAG DIAGNOSIS

Tool

Tool number and name Supersession

Application

MB990803

MB990803
Steering wheel puller

General service tool

Steering wheel removal

MB991910

MB991826

YB9919580000

MB991911

MB991914

MB991824

MB991827

MB991825

Do not use

Do not use

a

b

c

d

e

f

g

MB991958

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: 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 (Vehicles
with

CAN

communication system)
D:

M.U.T.-III

main

harness B (Vehicles
without

CAN

communication system)
E:

M.U.T.-III

main

harness C (for Daimler
Chrysler models only)
F:

M.U.T.-III

measurement adapter
G: M.U.T.-III Trigger
Harness

MB991824-KIT

NOTE:

G: MB991826

M.U.T.-III Trigger
Harness is not
necessary when pushing
V.C.I. ENTER key.

Checking diagnostic trouble code

M.U.T.-III main harness A
(MB991910) should be used.
M.U.T.-III main harness B and C
should not be used for this
vehicle.

MB991865

MB991865
Dummy resistor

SRS air bag and seat belt with pre-
tensioner circuit check

MB991866

MB991866
Resistor harness

SRS air bag circuit check

52B-314

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SPECIAL TOOLS