Mitsubishi Evolution X. Manual - part 566

 

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Mitsubishi Evolution X. Manual - part 566

 

 

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-171

NOTE: 

*

 shows that it is displayed but not used.

ACTUATOR TEST TABLE

M1429605100058

37

Threshold of PRS. 
warning release

The tire pressure is within the specified 
value range.

ON

The tire pressure is not within the 
specified value range.

OFF

38

Number of registered 
TPMS ID

Number of stored TPMS

39

Ignition signal(CAN 
data)

Ignition switch: ON

ON

Ignition switch: OFF

OFF

40

Ignition signal(Port 
input)

Ignition switch: ON

ON

Ignition switch: OFF

OFF

41

VSS

Drive the vehicle

The scan tool and the 
speedometer readings 
are approximately the 
same

50

Registered ID 
reception, Tier1 

Ignition switch: ON

Yes

Ignition switch: OFF

No

51

Registered ID 
reception, Tier2 

Ignition switch: ON

Yes

Ignition switch: OFF

No

52

Registered ID 
reception, Tier3 

Ignition switch: ON

Yes

Ignition switch: OFF

No

53

Registered ID 
reception, Tier4 

Ignition switch: ON

Yes

Ignition switch: OFF

No

54

*

Registered ID 
reception, Tier5

Ignition switch: ON

Yes

Ignition switch: OFF

No

61

Air pressure, Tire1(not 
adjusted)

62

Air pressure, Tire2(not 
adjusted)

63

Air pressure, Tire3(not 
adjusted)

64

Air pressure, Tire4(not 
adjusted)

65

*

Air pressure, Tire5(not 
adjusted)

Item No.

Scan tool MB991958 
display

Check condition

Normal condition

Item No.

Check item

Driven component

01

Outer tone alarm

Forces to sound the outer tone alarm.

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-172

TROUBLE SYMPTOM CHART

M1429604500235

SYMPTOM PROCEDURES

Inspection Procedure 1: Scan tool cannot communicate with KOS-ECU.

CAUTION

Before replacing the ECU, ensure that the com-
munication circuit is normal.

.

TECHNICAL DESCRIPTION (COMMENT)

If the M.U.T.-III 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

Trouble symptom

Inspection 
procedure 
number

Reference 
page

Scan tool cannot communicate with KOS-ECU.

1

P.42B-172

The keyless operation key cannot be registered using scan tool.

2

P.42B-174

Abnormality in KOS-ECU power supply and ground circuits.

3

P.42B-185

Keyless operation warning display does not disappear.

4

P.42B-188

IG knob will not turn (keyless operation is not recognized).

5

P.42B-190

The engine will not start with KOS (IG knob operates normally).

6

P.42B-199

Engine does not start with emergency key (cranking but no initial combustion).

7

P.42B-201

No door will be locked or unlocked by operating a lock switch on any door, or by 
touching the unlock sensor.

8

P.42B-203

Driver's door lock switch does not work.

9

P.42B-208

Driver's door unlock sensor does not work.

10

P.42B-213

Front passenger's door lock switch does not work.

11

P.42B-217

Front passenger's door unlock sensor does not work.

12

P.42B-223

Trunk lid opener switch does not work.

13

P.42B-229

Keyless entry system does not work.

14

P.42B-234

KOS timer lock function does not work.

15

P.42B-243

Keyless entry hazard light answerback function, the dome light answerback 
function or the horn answerback function does not work normally.

16

P.42B-245

The trunk is not opened when the keyless operation key "TRUNK" button is 
operated.

17

P.42B-248

Outer tone alarm does not sound.

18

P.42B-255

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-173

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

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) 

P.42B-10

."

(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-14

).

STEP 2. Check the power supply circuit and the ground 
circuit to WCM.
Refer to Inspection Procedure 3 "Abnormality in KOS-ECU 
power supply and ground circuits" 

P.42B-185

.  

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 

P.00-15

).

NO :  Replace KOS-ECU and register the ID codes (Refer 

to 

P.42B-12

).

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-174

Inspection Procedure 2: The keyless operation key cannot be registered using scan tool.

Receiver Antenna  Module and KOS-ECU Circuit

KOS-ECU

IMMOBILIZER
ANTENNA

RECEIVER

RECEIVER ANTENNA
ASSEMBLY

RECEIVER ANTENNA
MODULE

JOINT
CONNECTOR (6)

AC708950AX

C-41

Connectors: C-05, C-41

C-05

AC708951CG

Connectors: C-08, C-16

C-16 (B)

C-08

 

 

 

 

 

 

 

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