Mitsubishi Outlander XL. Manual - part 941

 

If  DTC  U0176  is  set  in  the  SRS-ECU,  always
diagnose the CAN main bus line.

CIRCUIT OPERATION
If an impact of set value or more is detected, the side
impact  sensor  (rear)  sends  the  coded  acceleration
data  to  SRS-ECU  via  side  impact  sensor  (front).
Based  on  the  acceleration  data,  SRS-ECU
determines  the  necessity  of  curtain  air  bag
deployment,  and  then  turns  ON  the  power  supply
circuit to the inflator.

DTC SET CONDITIONS
These  DTCs  are  set  if  communication  between  the
side impact sensor (rear) (RH) and the SRS-ECU is
not possible or faulty.

TROUBLESHOOTING HINTS

｠

Damaged wiring harnesses or connectors

｠

Malfunction of the side impact sensor (rear) (RH)

｠

Malfunction of the SRS-ECU

DIAGNOSIS

Required Special Tools:

｠

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).

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-295

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 Cope with Intermittent Malfunction P.00-15).

STEP 3. Check for any diagnostic trouble code. (Using scan
tool MB991958, read the diagnostic trouble code.)
Check the side impact sensor (rear) (RH).

(1)

Disconnect the negative battery terminal.

(2)

Replace  the  side  impact  sensor  (rear)  (RH)  with  the  side
impact sensor (rear) (LH).

(3)

Connect the negative battery terminal.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

(4)

Erase diagnostic trouble code from memory, and check the
diagnostic trouble code.

Q:Is DTC U0176 set?

YES:

 Replace the side impact sensor (rear) (RH) with a

new one. (Refer to P.52B-338). Go to Step 5.

NO:

 Go to Step 4.

STEP 4. Check the harness wires for open circuit or short
circuit between side impact sensor (rear) (RH) connector

52B-296

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS

D-132 (terminal No.1 and 2) and side impact sensor (front)
(RH) connector D-129 (terminal No.4 and 3).

Q:Are the harness wires between side impact sensor (rear)

(RH)  connector  D-132  (terminal  No.1  and  2)  and  side

impact sensor (front) (RH) connector D-129 (terminal No.

4 and 3) in good condition?

YES:

 Erase the diagnostic trouble code memory, and check

the diagnostic trouble code. If DTC U0176 sets, replace
the SRS-ECU (Refer to P.52B-326). Then go to Step 5.

NO:

 Replace the harness wires between side impact sensor

(rear) (RH) connector D-132 and side impact sensor
(front) (RH) connector D-129. Then go to Step 5.

STEP 5. 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 U0176 set?

YES:

 Return to Step 1.

NO:

 The procedure is complete.

DTC U0184: Audio CAN Timeout

M15204001007USA0000010000

｠

If the DTC U0184 is set, be sure to diagnose the
CAN main bus line.

｠

When replacing the ECU, always check that the
communication circuit is normal.

DIAGNOSTIC FUNCTION
When  the  signals  from  radio  and  CD  player  or  CD
changer cannot be received, the SRS-ECU sets the
DTC U0184.

JUDGEMENT CRITERIA
Because of the CAN-B bus circuit malfunction, if SRS-
ECU  becomes  unable  to  perform  the  normal  data
transmission,  SRS-ECU  determines  that  an
abnormality is present.

TROUBLESHOOTING HINTS

｠

The CAN bus line may be defective

｠

The  radio  and  CD  player  or  CD  changer  may  be
defective

｠

The SRS-ECU may be defective

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-297

SRS AIR BAG DIAGNOSIS

DIAGNOSIS

Required Special Tools:

｠

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

｠

MB991824: Vehicles 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).

STEP 2. Using scan tool MB991958, read the audio
diagnostic trouble code
Check if the DTC is set to the audio.

Q:Is the DTC set?

YES:

 Diagnose the radio and CD player (Refer to GROUP 54B

Diagnosis P.54B-165).

NO:

 Go to Step 3.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-ECU.

(1)

Erase the DTC.

(2)

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

(3)

Check if DTC is set.

(4)

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

Q:Is the DTC set?

YES:

 Replace the SRS-ECU.

NO:

 There is an intermittent malfunction such as poor

engaged connector(s) or open circuit (Refer to GROUP 00,

52B-298

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS