Mitsubishi Outlander GS45X. Manual — part 1137
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-127
STEP 4. Check part number of KOS-ECU.
Check the part number of WCM.
OK: 8637A305
Q: Is the check result normal?
YES : Go to Step 5.
NO : Replace KOS-ECU and register the ID codes. (Refer
to
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(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 KOS-ECU 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
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-128
TROUBLE SYMPTOM CHART
M1429604500934
SYMPTOM PROCEDURES
Inspection Procedure 1: Cannot communicate with KOS-ECU using the scan tool.
CAUTION
Before replacing the ECU, ensure that the com-
munication circuit is normal.
.
TECHNICAL DESCRIPTION (COMMENT)
If the scan tool cannot communicate with the
KOS-ECU, the CAN bus lines may be defective. If
the KOS-ECU does not work, the KOS-ECU or the
power supply circuit may be defective.
.
TROUBLESHOOTING HINTS
• Malfunction of the power supply or ground of
KOS-ECU
• Malfunction of CAN bus line
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
Trouble symptom
Inspection
procedure
number
Reference
page
Cannot communicate with KOS-ECU using the scan tool.
1
Abnormality in KOS-ECU power supply and ground circuits.
2
Keyless operation warning display does not disappear.
3
IG knob will not turn (keyless operation is not recognized).
4
The engine will not start with KOS (IG knob operates normally).
5
No door will be locked or unlocked by operating a lock/unlock switch on any door. 6
Driver's door lock/unlock switch does not work.
7
Front passenger's door lock/unlock switch does not work.
8
The lock switch and liftgate lock release handle of the liftgate lock release handle
do not work.
9
The lock switch of the liftgate lock release handle does not perform the locking
operation.
10
Liftgate lock release handle does not perform the unlocking operation.
11
Keyless entry system does not work.
12
KOS timer lock function does not work.
13
The dome light, the turn-signal lights and horn do not operate through the
answerback function.
14
Outer tone alarm does not sound.
15
The keyless operation key cannot be registered using scan tool.
16
Engine does not start with emergency key.
17
Power door locks with selective unlocking does not work.
18
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-129
• MB991824: Vehicles 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.
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. Check the power supply circuit and the ground
circuit to KOS-ECU.
Refer to Inspection Procedure 3 "Abnormality in KOS-ECU
power supply and ground circuits"
.
Q: Is the power supply circuit and the ground circuit to
KOS-ECU in good condition ?
YES : Go to Step 3.
NO : Repair the power supply circuit and the ground circuit
to KOS-ECU.
STEP 3. Retest the system
Check if scan tool can communicate with KOS-ECU.
Q: Does the scan tool cannot with KOS-ECU?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
NO : Replace KOS-ECU and register the ID codes (Refer
to
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-130
Inspection Procedure 2: Abnormality in KOS-ECU power supply and ground circuits.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
.
TECHNICAL DESCRIPTION (COMMENT)
If the KOS-ECU does not work at all or if the
KOS-ECU cannot communicate with the scan tool,
the KOS-ECU power supply or the ground circuit
may be defective.
.
ACA02760
IG1
RELAY
AB
POWER
SUPPLY
KOS-ECU Power Supply Circuit
ETACS-ECU
KOS-ECU
AC702145
Connector: C-102
AB
AC701632AD
Connector: C-317
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