Mitsubishi Outlander XL. Manual — part 826

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 (M.U.T.-III) P.42C-7."

(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 ETACS-ECU
diagnostic trouble code.
Check if DTC is set to the ETACS-ECU.

Q:Is the DTC set?

YES:

Troubleshoot the ETACS-ECU. Refer to P.54Ad-8.

NO:

Go to Step 3.

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

(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 WCM and register the ID codes. (Refer to P.

42C-8.)

NO:

The trouble can be an intermittent malfunction (Refer

to GROUP 00 - How to use Troubleshooting/inspection

WIRELESS CONTROL MODULE (WCM)

42C-63

DIAGNOSIS

Service Points - How to Cope with Intermittent
Malfunction P.00-15).

Code No.U1417 Implausible coding data

M14209200031USA0000010000

｠

If diagnostic trouble code U1417 is set in WCM, always
diagnose the CAN bus lines. If there is any fault in the CAN
bus lines, an incorrect diagnostic trouble code may be
set. In this case, the set diagnostic trouble code is not
highly reliable.

｠

Before replacing the ECU, ensure that the communication
circuit is normal.

｠

When diagnostic trouble code U1417 is set in WCM, the
diagnostic trouble code may also be set in ETACS-ECU.
When the diagnostic trouble code is set in ETACS-ECU,
carry out the diagnosis of the diagnostic trouble code for
ETACS-ECU first.

CIRCUIT OPERATION
WCM receives the vehicle information stored in the ETACS-ECU
via CAN bus lines.

DTC SET CONDITIONS
WCM communicates with ETACS-ECU via CAN bus lines. This
diagnostic trouble code is set when the vehicle information
received from the ETACS-ECU is invalid.

PROBABLE CAUSES

｠

Malfunction of ETACS-ECU

｠

Engine control module malfunction

｠

ETACS-ECUs have been interchanged between two vehicles.

｠

WCM malfunction

｠

External noise interference

｠

WCMs have been interchanged between two vehicles.

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

42C-64

WIRELESS CONTROL MODULE (WCM)

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.

(1)

Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III) P.42C-7."

(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 other system
diagnostic trouble code.
Check if DTC is set to the ETACS-ECU or engine control
module.

Q:Is the DTC set?

YES (DTC is set to ETACS-ECU.):

Troubleshoot the ETACS.

(Refer to GROUP 54Ad, Diagnosis P.54Ad-8.)

YES (DTC is set to the engine control module.):

Troubleshoot the MFI system. (Refer to GROUP 13Ab,
Diagnosis P.13Ab-44.)

NO:

Go to Step 3.

STEP 3. Check part number of ETACS-ECU
Check the part number of ETACS-ECU.

OK: 8637A213

Q:Is the check result normal?

YES:

Go to Step 4.

NO:

Replace ETACS-ECU.

STEP 4. Check part number of WCM
Check the part number of WCM.

OK: MN141352

Q:Is the check result normal?

YES:

Go to Step 5.

NO:

Replace WCM and register the ID codes. (Refer to P.

42C-8.)

STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.

(1)

Erase the DTC.

WIRELESS CONTROL MODULE (WCM)

42C-65

DIAGNOSIS

(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 WCM and register the ID codes. (Refer to P.

42C-8.)

NO:

The trouble can be an intermittent malfunction (Refer

to GROUP 00 - How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).

TROUBLE SYMPTOM CHART

M14209200033USA0000010000

During diagnosis, a DTC associated with other
system may be set when the ignition switch is

turned on with connector(s) disconnected. On
completion, check all systems for diagnostic
trouble code(s). If DTC(s) are set, erase them all.

Trouble symptom

Inspection
procedure
number

Reference
page

Scan tool cannot communicate with WCM.

1

P.42C-66

The ignition key cannot be registered using scan tool.

2

P.42C-68

Engine does not start.

3

P.42C-69

Check the WCM power supply and ground circuits.

4

P.42C-71

Keyless entry system does not work.

5

P.42C-73

The dome light and the turn-signal lights do not operate through the
answerback function.

6

P.42C-78

The timer lock function does not work after the doors have been unlocked by
the keyless entry system.

7

P.42C-79

SYMPTOM PROCEDURES

Inspection Procedure 1: Scan tool cannot communicate with WCM.

M14209200035USA0000010000

Before replacing the ECU, ensure that the
communication circuit is normal.

TECHNICAL DESCRIPTION (COMMENT)
WCM communicates with scan tool via CAN.
Therefore, communication error of WCM is
suspected.

TROUBLESHOOTING HINTS

｠

Malfunction of the power supply or ground of WCM

｠

Malfunction of CAN bus line

42C-66

WIRELESS CONTROL MODULE (WCM)

DIAGNOSIS