Mitsubishi Outlander XL. Manual — part 680
⦆
External noise interference
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. M.U.T.-III CAN bus diagnostics
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 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
Q:Is DTC C121C set?
YES:
Go to Step 3.
NO:
The procedure is complete.
STEP 3. M.U.T.-III other system diagnostic trouble code
Use scan tool to check that the diagnostic trouble code is set in
the engine ECU.
Q:Is any DTC set?
YES:
Troubleshoot the engine ECU diagnostic trouble
code. (Refer to GROUP 13Ab - Diagnostic trouble code
chart P.13Ab-44.)
NO:
Go to Step 4.
STEP 4. Check whether the diagnostic trouble code is reset.
Q:Is DTC C121C set?
YES:
Replace the ASC-ECU. Then go to Step 5.
NO:
If the trouble symptom is resolved, an intermittent
malfunction such as poorly engaged connector(s) or wiring
harness is suspected. (Refer to GROUP 00 - How to Cope
with Intermittent Malfunction P.00-15.)
STEP 5. M.U.T.-III diagnostic trouble code
Check that the diagnostic trouble code U1417 is set in ASC-
ECU.
Q:Is DTC U1417 set?
YES:
Troubleshoot for the diagnostic trouble code U1417.
NO:
The procedure is complete.
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-127
DIAGNOSIS
DTC C1290: CAN time-out error
M13506100055USA0000010000
⦆
If the diagnostic trouble code C1290 is set in ASC-ECU,
always diagnose the CAN bus line. 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 the diagnostic trouble code C1290 is set in ASC-
ECU, the diagnostic trouble code for another system may
also be set. When the diagnostic trouble code for another
system is set, carry out diagnosis for that system first.
CIRCUIT OPERATION
ASC-ECU receives signals necessary for the operations of ABS,
ASC, and TCL from the engine ECU, A/T-ECU, AWD-ECU,
ETACS-ECU, and the steering wheel sensor via the CAN bus
lines.
DTC SET CONDITIONS
ASC-ECU receives signals necessary for the operations of ABS,
ASC, and TCL from the engine ECU, A/T-ECU, AWD-ECU,
ETACS-ECU, and steering wheel sensor via CAN bus lines. This
diagnostic trouble code is stored when ASC-ECU cannot receive
the signals necessary for the operations of ABS, ASC, and TCL
from the engine ECU, A/T-ECU, AWD-ECU, ETACS-ECU, and
steering wheel sensor.
PROBABLE CAUSES
⦆
Engine ECU malfunction
⦆
Malfunction of A/T-ECU
⦆
AWD-ECU malfunction
⦆
Steering wheel sensor malfunction
⦆
Malfunction of the CAN bus
⦆
ASC-ECU malfunction
⦆
Malfunction of ETACS-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
35C-128
ACTIVE SKID CONTROL SYSTEM (ASC)
DIAGNOSIS
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES:
Go to Step 2.
NO:
Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 5.
STEP 2. M.U.T.-III diagnostic trouble code
Check that the diagnostic trouble codes U0100, U0101, U0114,
U0126, and U0141 are set in ASC-ECU.
Q:Is any DTC set?
YES:
Troubleshoot for the relevant diagnostic trouble
NO:
Go to Step 3.
STEP 3. M.U.T.-III other system diagnostic trouble code
Using scan tool, check if the diagnostic trouble codes are set
from the engine ECU, A/T-ECU, AWD-ECU and ETACS-ECU or
not.
Q:Is any DTC set?
YES:
Troubleshoot the relevant diagnostic trouble code,
and then go to Step 4.
NO:
Go to Step 5.
STEP 4. Check whether the diagnostic trouble code is reset.
Q:Is DTC C1290 set?
YES:
Replace the ASC-ECU. Go to Step 5.
NO:
If the trouble symptom is resolved, an intermittent
malfunction such as poorly engaged connector(s) or wiring
harness is suspected. (Refer to GROUP 00 - How to Cope
with Intermittent Malfunction P.00-15.)
STEP 5. Check whether the diagnostic trouble code is reset.
Q:Is DTC C1290 set?
YES:
Return to Step 1.
NO:
The procedure is complete.
DTC C2203: VIN not recorded
M13506100056USA0000010000
⦆
If there is any problem in the CAN bus lines, an incorrect
diagnostic trouble code may be set. Prior to this
diagnosis, diagnose the CAN bus lines. (Refer to GROUP
54D, Trouble code diagnosis P.54D-17).
⦆
When other diagnostic trouble code for ASC-ECU is set,
troubleshoot that diagnostic trouble code first.
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-129
DIAGNOSIS
CIRCUIT OPERATION
ASC-ECU receives vehicle information from the engine ECU
and stores it.
DTC SET CONDITIONS
This diagnostic trouble code is set when ASC-ECU cannot
receive the vehicle information from the engine ECU.
PROBABLE CAUSES
⦆
Malfunction of the CAN bus
⦆
Engine ECU malfunction
⦆
ASC-ECU malfunction
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. M.U.T.-III CAN bus diagnostics
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 54D - CAN
Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.
STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines
Q:Is DTC C2203 set?
YES:
Go to Step 3.
NO:
The procedure is complete.
STEP 3. M.U.T.-III diagnostic trouble code
Check that the engine ECU sets a diagnostic trouble code.
Q:Is any DTC set?
YES:
Troubleshoot the engine ECU diagnostic trouble
code. (Refer to GROUP 13Ab - Diagnostic trouble code
chart P.13Ab-44.)
NO:
Go to Step 4.
STEP 4. Check whether the diagnostic trouble code is reset.
Q:Is DTC C2203 set?
YES:
Replace the ASC-ECU.
NO:
The procedure is complete.
35C-130
ACTIVE SKID CONTROL SYSTEM (ASC)
DIAGNOSIS
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