Mitsubishi Outlander GS45X. Manual — part 1120

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-59

DTC B2400: KOS key registration fail

CAUTION

• If the DTC B2400 is set, diagnose the CAN bus

lines.

• When replacing the ECU, always check that

the communication circuit is normal.

.

DTC SET CONDITION

If the registration of the keyless operation key ID to
KOS-ECU fails, KOS-ECU sets the DTC B2400.

.

TECHNICAL DESCRIPTION (COMMENT)

Assuming that another keyless operation key has
already been registered with KOS-ECU, if the regis-
tration of the keyless operation key ID fails when a
new keyless operation key is added or the existing
key is replaced, KOS-ECU determines that there is a
problem.

.

TROUBLESHOOTING HINTS

• Keyless operation key ID registration failure

• Malfunction of the keyless operation key

• Malfunction of CAN bus line

• Battery drain of keyless operation key

• Damaged wiring harness and connectors

• Malfunction of receiver antenna module

• Malfunction of KOS-ECU

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)

ACA02752

IMMOBILIZER
ANTENNA

KEYLESS
ENTRY
RECEIVER

Receiver Antenna Module and KOS-ECU Circuit

KEYLESS
OPERATION
KEY

RECEIVER
ANTENNA
MODULE

KOS-ECU

TRANSPONDER

KEY ID

AB

AC702145AB

Connector: C-30, C-102

C-30

C-102

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-60

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
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(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,

Diagnosis

P.54C-17

).

STEP 2. Replace the battery in the keyless operation key
and recheck the diagnostic trouble code.
Replace the battery of the keyless operation key for which the
DTC is set, and check whether the DTC is reset.
(1) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

YES : Go to Step 3.
NO : The procedure is complete. (Discharged battery)

STEP 3. Replace the keyless operation key and recheck
the diagnostic trouble code.
Replace the keyless operation key for which the DTC is set
with a new one, register the encrypted code and keyless opera-
tion key ID (refer to

P.42B-15

), and check whether the DTC is

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

the "ON" position.

(2) Check if the DTC is set.
Q: Is the diagnostic trouble code set?

YES : Go to Step 4.
NO : The procedure is complete.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-61

STEP 4. Check receiver antenna module connector C-30
and KOS-ECU connector C-102 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Is the receiver antenna module connector C-30 and

KOS-ECU connector C-102 in good condition?
YES : Go to Step 5.
NO : Repair the defective connector.

STEP 5. Check the wiring harness between the receiver
antenna assembly connector C-30 (terminal Nos.1, 8, 12, 3,
5, 2, 4) and the KOS-ECU connector C-102 (terminal
Nos.12, 32, 7, 9, 13, 11, 10) for open circuit.

• Check the signal lines for open circuit and short circuit.

Q: Is the wiring harness between receiver antenna

assembly connector C-30 (terminal Nos.1, 8, 12, 3, 5, 2,
4) and the KOS-ECU connector C-102 (terminal Nos.12,
32, 7, 9, 13, 11, 10) in good condition?
YES : Go to Step 6.
NO : The wiring harness may be damaged or the

connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.

STEP 6. Replace the receiver antenna module, and check
whether the diagnostic trouble code is reset.
(1) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

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

to

P.42B-15

).

NO : The procedure is complete.

DTC B2401: Keyless/KOS key ID not registered

CAUTION

• If the DTC B2401 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 no keyless operation key ID is registered with
KOS-ECU or if the keyless operation key with ID not
registered is used, KOS-ECU sets the DTC B2401.

.

JUDGEMENT CRITERIA

If the number of the registered keyless operation
keys is 0, or the registration of a keyless operation
key fails when the number of the registered keyless
operation keys is 0, it is judged as abnormal.

.

PROBABLE CAUSES

• Malfunction of CAN bus line

• The registration of a keyless operation key ID

fails when no keyless operation key ID is regis-
tered.

• Malfunction of the keyless operation key

• Malfunction of KOS-ECU

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-62

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.

CAUTION

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 to the data link connector.
(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,

Diagnosis

P.54C-17

).

STEP 2. Register the keyless operation key ID and recheck
the diagnostic trouble code.
Register the keyless operation key ID (refer to

P.42B-188

), and

check whether the DTC is reset.
(1) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

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

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector