Mitsubishi Galant 9G. Manual - part 1486

ON-VEHICLE SERVICE

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-354

ON-VEHICLE SERVICE

ACCURACY CHECK OF OCCUPANT 
CLASSIFICATION SENSOR

M1524025100049

CAUTION

The following precaution must be observed when execut-
ing accuracy testing and calibration.

• Eliminate the occupant classification sensor friction.
• Perform the occupant classification sensor calibration 

at room temperature. (Proposal: 20 

± 15°C (68 ± 27° F)) 

(Before the calibration, place the occupant classifica-
tion sensor more than 30 minutes at room tempera-
ture.)

• Do not apply any load or vibration while the weight 

check and the calibration is performed.

• Perform the weight check and the calibration after seat 

components are all assembled.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

ON-VEHICLE SERVICE

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-355

2. Open and close the front door (RH) 5 times hardly to remove 

the friction. And if the door does not open and close 
smoothly after the impact, hit the front and rear sides of 
seatback about eight times each to remove the friction. 

3. To execute accuracy check and calibration, operate scan 

tool MB991958 (MUT-III Sub Assembly) as follows.

(1) Select "Interactive Diagnosis".
(2) Select "Special Function".
(3) Select "Seat Weight Sensor Accuracy Check".

AC307653

AB

<FRONT DOOR (RH)>

<PASSENGER'S SIDE SEAT>

AC307349

Seat Weight Sensor Accuracy Check

Please select function.

BODY

SRS-Air Bag

Special Function

Special Function

NXXXXXXXXX

ON-VEHICLE SERVICE

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-356

(4) For accuracy check 30 kg (66 pounds), slide the seat to 

the front end, and put the 30 kg (66 pounds) weight on 
the center of the seat cushion. Then, carry out the friction 
removal in step (2) and press the OK button to execute 
accuracy check.

NOTE: If there is not the 30 kg (66 pounds) weight, load a 
square thing of 30 to 40 kg (66 to 88 pounds) instead of 
the weight. At this time, operate the arrow button of 
weight input part on MUT-III to input the loaded weight 
value.

AC307372

Weight: 30 to 40kg 
(66 to 88 pounds)

AB

AC307350

Step1:Accuracy Check -30kg-

Item

Check Result

Input value

Sensor output

Tolerance level

Value

Step1:Accuracy Check Results -30kg-

Part Number:MRxxxxxx/Communication Type:CAN/DVC:xxxxxxxxxx

Weight(30.0-40.0kg)

30.0 kg

Special Function

SRS-Air Bag

Seat Weight Sensor Accuracy Check

Special Function

NXXXXXXXXX

Item

Check Result

Input value

Sensor output

Tolerance level

Value

Step2:Accuracy Check Results -0kg-

(1)Put 30-40kg weight on the center of
     passenger seat.
(2)Input the value of the weight put on the seat.
(3)Press OK button and start the Sensor
     Accuracy Check for 30kg.

AC307351

Step1:Accuracy Check -30kg-

Item

Check Result

Input value

Sensor output

Tolerance level

Value

Step1:Accuracy Check Results -30kg-

Part Number:MRxxxxxx/Communication Type:CAN/DVC:xxxxxxxxxx

Weight(30.0-40.0kg)

Executing

30.0 kg

Special Function

SRS-Air Bag

Seat Weight Sensor Accuracy Check

Special Function

NXXXXXXXXX

Item

Check Result

Input value

Sensor output

Tolerance level

Value

Step2:Accuracy Check Results -0kg-

ON-VEHICLE SERVICE

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-357

(5) If the tolerance level between the sensor output and the 

input value is within 4.9 kg (11 pounds), the screen for the 
accuracy check completion is displayed, and if more than 
4.9 kg (11 pounds), the screen for abnormal condition is 
displayed.

NOTE: When the screen for the accuracy check of 0 kg 
(0 pound) is displayed, go to step (9). If the abnormal 
condition is displayed, check the seat installation condi-
tion. If the seat is improperly installed, install it properly 
and carry out the operation in step (4) again. 

(6) When the abnormal condition is displayed, press the OK 

button and go to the calibration screen. If the cancel 
button is pressed the screen returns to step (4).

AC307352

Step2:Accuracy Check -0kg-

Item

Check Result

Input value

Sensor output

Tolerance level

Step1:Accuracy Check Results -30kg-

Part Number:MRxxxxxx/Communication Type:CAN/DVC:xxxxxxxxxx

Weight(0kg)

0 kg

Special Function

SRS-Air Bag

Seat Weight Sensor Accuracy Check

Special Function

NXXXXXXXXX

Item

Check Result

Input value

Sensor output

Tolerance level

Value

Step2:Accuracy Check Results -0kg-

(1)Unload weight and remove friction.
(2)Press OK button and start the Sensor
     Accuracy Check for 0kg.

OK

30.0kg

30.5kg

25.1~34.9kg

Value

AC307357

Accuracy Check of 30kg is NG

Please unload weight and remove friction
then start the Zero-calibration procedure.

MUT-lll-- Web

AC307358

Zero-calibration

Item

Check Result

Input value

Sensor output

Tolerance level

Step1:Accuracy Check Results -30kg-

Part Number:MRxxxxxx/Communication Type:CAN/DVC:xxxxxxxxxx

Special Function

SRS-Air Bag

Seat Weight Sensor Accuracy Check

Special Function

NXXXXXXXXX

Item

Check Result

Input value

Sensor output

Tolerance level

Value

Step2:Accuracy Check Results -0kg-

(1)Unload weight and remove friction.
(2)Press OK button and start the 
    Zero-calibration.

OK

30.0kg

36.5kg

25.1~34.9kg

Value