Mitsubishi Outlander XL. Manual — part 904

ZC500788

C-27 Harness side
connector (front view)

0064

(11)

Measure the resistance between terminal 55 and terminal
58.
It should be an open circuit.

Q:Does the resistance meet the value above?

YES:

Erase the diagnostic trouble code memory, and check

the diagnostic trouble code. If DTC B1B50, B1B51or B1B52
are set, replace the SRS-ECU. (Refer to P.52B-326.) Then
go to Step 6.

NO:

Go to Step 5.

STEP 5. Check the harness wires between SRS-ECU
connector C-27 (terminal No.55 and 58) and passenger’s
seat belt switch connector D-32 (terminal No.1 and 2).

Q:Are harness wires between SRS-ECU connector C-27

(terminal No.55 and 58) and passenger’s seat belt switch

connector D-32 (terminal No.1 and 2) in good condition?

YES:

Go to Step 6.

NO:

Replace the harness wires between SRS-ECU connector

C-27 and passenger’s seat belt switch connector D-32.
Then go to Step 6.

STEP 6. Recheck for diagnostic trouble code.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

Check again if the DTC is set.

(1)

Erase the DTC.

(2)

Turn the ignition switch to the "ON" position.

(3)

Check if the DTC is set.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is DTC B1B54, B1B55 or B1B56 set?

YES:

Return to Step 1.

NO:

The procedure is complete.

DTC B1B70: Malfunction of G-sensor inside Front Impact Sensor (LH)
DTC B1B71: Malfunction of G-sensor inside Front Impact Sensor (RH)

M15204000948USA0000010000

If DTC B1B70 or B1B71 is set in the SRS-ECU,
always diagnose the CAN main bus line.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-147

SRS AIR BAG DIAGNOSIS

DTC SET CONDITIONS
These DTCs are set if the following conditions are
detected from the analog G-sensor inside the front
impact sensor output:

｠

Analog G-sensor is not operating.

｠

Analog G-sensor characteristics are abnormal.

｠

Analog G-sensor output is abnormal.

TROUBLESHOOTING HINTS
Malfunction of front impact sensor (LH) (for DTC
B1B70) and front impact sensor (RH) (for DTC
B1B71)

DIAGNOSIS

Required Special Tool:

｠

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

｠

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

｠

MB991827: M.U.T.-III USB Cable

｠

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

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.

(1)

Connect scan tool MB991958. Refer to "How to connect the
scan tool P.52B-31."

(2)

Turn the ignition switch to the "ON" position.

(3)

Diagnose the CAN bus line.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the CAN bus line found to be normal?

YES:

Go to Step 2.

NO:

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

Diagnosis P.54D-17).

52B-148

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS

STEP 2. Recheck for diagnostic trouble code.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

Check again if the DTC is set.

(1)

Erase the DTC.

(2)

Turn the ignition switch to the "ON" position.

(3)

Check if the DTC is set.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the DTC set?

YES:

Go to Step 3.

NO:

There is an intermittent malfunction such as poor

engaged connector(s) or open circuit (Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunctions P.00-15).

STEP 3. Check the front impact sensor. (Using scan tool
MB991958, read the diagnostic trouble code.)
Replace the front impact sensor (RH) or front impact sensor (LH)
with a new one. (Refer to P.52B-324).
Check the diagnostic trouble code.

Q:Is either DTC B1B70 or B1B71 set?

YES:

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

NO:

The procedure is complete.

DTC B1B72: Malfunction of G-sensor Inside Side Impact Sensor (Front) (LH)
DTC B1B75: Malfunction of G-sensor Inside Side Impact Sensor (Front) (RH)

M15204000953USA0000010000

If the diagnostic trouble code B1B72 or B1B75 is
set in the SRS-ECU, always diagnose the CAN
main bus line.

DTC SET CONDITIONS
These DTCs are set if the following conditions are
detected from the analog G-sensor inside the side
impact sensor output:

｠

Analog G-sensor is not operating.

｠

Analog G-sensor characteristics are abnormal.

｠

Analog G-sensor output is abnormal.

TROUBLESHOOTING HINTS
Malfunction of side impact sensor (front) (LH) (for DTC
B1B72) and side impact sensor (front) (RH) (for DTC
B1B75)

DIAGNOSTIC PROCEDURE

Required Special Tools:

｠

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

｠

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

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-149

SRS AIR BAG DIAGNOSIS

｠

MB991827: M.U.T.-III USB Cable

｠

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

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.

(1)

Connect scan tool MB991958. Refer to "How to connect the
scan tool P.52B-31."

(2)

Turn the ignition switch to the "ON" position.

(3)

Diagnose the CAN bus line.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the CAN bus line found to be normal?

YES:

Go to Step 2.

NO:

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

Diagnosis P.54D-17).

STEP 2. Recheck for diagnostic trouble code.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

Check again if the DTC is set.

(1)

Erase the DTC.

(2)

Turn the ignition switch to "ON" position.

(3)

Check if the DTC is set.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the DTC set?

YES:

Go to Step 3.

NO:

There is an intermittent malfunction such as poor

engaged connector(s) or open circuit (Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunctions P.00-15).

STEP 3. Check the side impact sensor. (Using scan tool
MB991958, read the diagnostic trouble code.)
Replace the side impact sensor (front) (RH) or side impact
sensor (front) (LH) with a new one. (Refer to P.52B-338).
Check the diagnostic trouble code.

52B-150

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS