Mitsubishi Outlander GS45X. Manual - part 1129

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-95

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 2.
NO :  Repair the CAN bus lines (Refer to GROUP 54C 

− 

CAN Bus Diagnostics table 

P.54C-17

). On 

completion, go to Step 2.

STEP 2. Diagnostic trouble code check
(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 C1608 set?

YES : Replace the KOS-ECU and register the ID codes 

(Refer to 

P.42B-188

). Then go to Step 3.

NO :  The procedure is complete.

STEP 3. Diagnostic trouble code check
(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 C1608 set?

YES : Start over at Step 1.
NO :  The procedure is complete.

DTC C1900: No registration

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 

P.54C-17

).

.

DTC SET CONDITION

When the ID registration information of the TPMS transmitter is 
not stored in KOS-ECU, and/or when KOS-ECU is replaced 
with a new one, this code is set. If the ID registration mode is 
terminated forcibly or time-out after one or more TPMS trans-
mitters are registered in the ID registration mode, the ID infor-
mation in the KOS-ECU is erased, and this diagnostic trouble 
code is set.

.

TROUBLESHOOTING HINTS

The most likely causes for this DTC to set are:

• Damaged wiring harness and connector

• Malfunction of TPMS transmitter

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-96

• Malfunction of KOS-ECU

• ID code registration failed

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 2.
NO :  Repair the CAN bus lines (Refer to GROUP 54C 

− 

CAN Bus Diagnostics table 

P.54C-17

). On 

completion, go to Step 2.

STEP 2. Diagnostic trouble code check
(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 C1900 set?

YES : Register the ID codes (Refer to 

P.42B-188

). Then go 

to Step 3.

NO :  The procedure is complete.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(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 C1900 reset?

YES : Replace the KOS-ECU and register the ID codes 

(Refer to 

P.42B-15

). Then start over at Step 1.

NO :  The procedure is complete.

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-97

DTC C1901: Vehicle speed information abnormality

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 

P.54C-16

).

.

DTC SET CONDITION

KOS-ECU receives the wheel speed information from 
ABS-ECU or ASC-ECU via the CAN-bus line. Although 
KOS-ECU receives the information that the wheel is not cur-
rently rotated from ABS-ECU or ASC-ECU, if the TPMS trans-
mitter sends the information that the wheel is rotated, this code 
is set.

.

TROUBLESHOOTING HINTS

The most likely causes for this DTC to set are:

• Damaged wiring harness and connector

• Malfunction of TPMS transmitter

• Malfunction of KOS-ECU

• Malfunction of ABS-ECU or ASC-ECU

• 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 

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 

P.54C-16

). 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 the DTC C1901 set?

YES : Go to Step 3.
NO :  The procedure is complete.

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-98

STEP 3. Check for other diagnostic trouble code.
Check if the diagnostic trouble code is set from ABS-ECU or 
ASC-ECU <Refer to GROUP 35B, diagnostic trouble code 
chart 

P.35B-15

 (vehicles without ASC) or Refer to GROUP 

35C, diagnostic trouble code chart 

P.35C-18

 (vehicles with 

ASC)>.
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Carry out the troubleshooting for ABS-ECU or 

ASC-ECU <Refer to GROUP 35B, diagnostic trouble 
code chart 

P.35B-15

 (vehicles without ASC) or Refer 

to GROUP 35C, diagnostic trouble code chart 

P.35C-18

 (vehicles with ASC)>. Then go to Step 6.

STEP 4. Check for other diagnostic trouble code.
Check if the diagnostic trouble code is set from ETACS-ECU 
(Refer to GROUP 54A, ETACS 

− diagnostic trouble code chart 

P.54A-733

).

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Troubleshoot the set DTC (Refer to GROUP 54A, 

ETACS 

− diagnostic trouble code chart 

P.54A-733

). 

Then go to Step 6.

STEP 5. Check the TPMS transmitter acceleration.
Check the acceleration value of each TPMS transmitter by the 
TPMS transmitter check function (Refer to 

P.42B-188

).

OK:

Acceleration value: 5G or less

Q: Is the check result OK?

YES : Replace the KOS-ECU and register ID codes (Refer 

to 

P.42B-15

). Then go to Step 6.

NO :  Replace the TPMS transmitter and register ID codes 

(Refer to 

P.42B-15

). Then go to Step 6.

STEP 6. Recheck for diagnostic trouble code.
(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 C1901 set?

YES : Start over at Step 1.
NO :  The procedure is complete.