Mitsubishi Outlander GS45X. Manual — part 1172
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-55
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
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the CAN bus lines (Refer to GROUP 54C
−
CAN Bus Diagnostics table
). On
completion, go to Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
Q: Is the DTC C1913, C1923, C1933, C1943, C1914, C1924,
C1934 or C1944 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Check for TPMS transmitter.
Identify the TPMS transmitter which the DTC is set by TPMS
transmitter check (Refer to
NOTE: The TPMS transmitter which cannot be checked may
be faulty or the ID code may not be registered, thus do not
replace it, but register the ID code. If the transmitter is faulty, it
is replaced in the ID code registration process.
Q: Are there any TPMS transmitters which are identified?
YES : Among the checked TPMS transmitters, replace the
TPMS transmitters to which the DTC is set. Then
register the ID codes (Refer to
). Then go to
Step 4.
NO : Even when no transmitter is checked, register the ID
codes (Refer to
). Then go to Step 4.
STEP 4. Diagnostic trouble code recheck after register the
ID codes
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(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 C1913, C1923, C1933, C1943, C1914, C1924,
C1934 or C1944 set?
YES : Replace the WCM and register the ID codes (Refer to
). Then start over at Step 1.
NO : The procedure is complete.
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-56
DTC C1915: Transmitter OFF mode 1
DTC C1925: Transmitter OFF mode 2
DTC C1935: Transmitter OFF mode 3
DTC C1945: Transmitter OFF mode 4
CAUTION
If there is any problem in the CAN bus lines, an incorrect
diagnostic trouble code may be set. Prior to this diagno-
sis, diagnose the CAN bus lines (Refer to GROUP 54C,
Trouble code diagnosis
.
DTC SET CONDITION
When the TPMS transmitter(s) is in the OFF MODE, this code
is set.
.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
• OFF mode cancellation not performed
• Damaged wiring harness and connector
• Malfunction of TPMS transmitter
• Malfunction of WCM
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
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the CAN bus lines (Refer to GROUP 54C
−
CAN Bus Diagnostics table
). On
completion, go to Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(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 C1915, C1925, C1935 or C1945 set?
YES : Go to Step 3.
NO : The procedure is complete.
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-57
STEP 3. Diagnostic trouble code check
(1) Drive the vehicle for five minutes.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are the all DTC C1915, C1925, C1935 and C1945 set?
YES : Replace the TPMS transmitters of all the four wheels,
and register ID codes (Refer to
). Then go to
Step 4.
NO : Register the ID codes (Refer to
). Then go to
Step 4.
STEP 4. Diagnostic trouble code recheck after register the
ID codes
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1915, C1925, C1935 or C1945 set?
YES : Replace the WCM and register the ID codes (Refer to
). Then start over at Step 1.
NO : The procedure is complete.
DTC U0019: Bus off(CAN-B)
CAUTION
• If DTC U0019 is set, be sure to diagnose the
CAN bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DTC SET CONDITION
If the CAN-B circuit malfunctions, the WCM sets DTC
U0019.
.
TECHNICAL DESCRIPTION(COMMENT)
If WCM cannot perform the data transmission in nor-
mal conditions due to a malfunction of the CAN-B
bus circuit, WCM determines that there is a problem.
.
TROUBLESHOOTING HINT
The CAN bus line may be defective
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)
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-58
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
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. Refer to "How to connect the
Scan Tool (M.U.T.-III)
(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 54C,
).
STEP 2. 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
.)
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
DTC U0141: ETACS-ECU CAN timeout
CAUTION
• If the DTC U0141 is set, be sure to diagnose
the CAN bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DIAGNOSTIC FUNCTION
If the signal from ETACS-ECU cannot be received,
the WCM sets DTC U0141.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line
• Malfunction of WCM
• Malfunction of ETACS-ECU
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
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