Page 5785 of 5883

WCS-70
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
1: Hatchback
2: Sedan
3: Manual A/C
4: Superlock
5: Remote keyless entry
6: Intelligent Key
7: LHD diesel69
(G)Ground Rear fog lamp OutputLighting switch
1ST and front
fog lamp switch
ONRear fog lamp switch OFF 0V
Rear fog lamp switch ON Battery voltage
70
(B)Ground Ground — — 0V
71
1
(V)Ground Rear wiper motor OutputRear wiper switch OFF 0V
Rear wiper switch ON Battery voltage
72
(LG)GroundBattery power sup-
plyInput — Battery voltage
73
(R)GroundInterior room lamp
power supplyOutputAfter passing the interior room lamp battery
saver operation time0V
Any other time after passing the interior room
lamp battery saver operation timeBattery voltage
74
(Y)GroundBattery power sup-
plyInput — Battery voltage
75
4
(V)Ground Super lock OutputWhen lock button of keyfob or Intelligent Key
is not pressed 0V
When lock button of keyfob or Intelligent Key
is pressed Battery voltage
76
(G)Ground Driver door unlock OutputDoor lock/un-
lock switchPressed to the unlock side Battery voltage
Pressed to the lock side 0V
77
(SB)Ground Door lock (All) OutputDoor lock/un-
lock switchPressed to the unlock side 0V
Pressed to the lock side Battery voltage
78
(L)GroundPower window pow-
er supplyOutput Ignition switchOFF or ACC 0V
ON Battery voltage
79
(Y)GroundBattery power sup-
plyInput — Battery voltage Te r m i n a l N o .
(Wire color)Description
ConditionReference Value
(Approx.)
Signal nameInput/
Output +−
Page 5786 of 5883
WCS
BCM (BODY CONTROL MODULE)
WCS-71
< ECU DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
Wiring DiagramINFOID:0000000001728315
ALMWA0067GB
Page 5787 of 5883
WCS-72
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
ALMWA0068GB
Page 5788 of 5883
WCS
BCM (BODY CONTROL MODULE)
WCS-73
< ECU DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
ALMWA0069GB
Page 5789 of 5883
WCS-74
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
DTC Inspection Priority Chart
INFOID:0000000001728316
JCMWA0411GB
Priority DTC
1 U1000: CAN COMM CIRCUIT
U1010: CONTROL UNIT (CAN)
Page 5790 of 5883
WCS
BCM (BODY CONTROL MODULE)
WCS-75
< ECU DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
DTC IndexINFOID:0000000001728317
NOTE:
Details of time display
CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
PAST: Displays when there is a malfunction that is detected in the past and stored.
1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condition if the malfunction is detected again.
CONSULT display TIME Fail-safe Refer to
No DTC is detected.
further testing
may be required.—— — —
U1000: CAN COMM CIRCUIT 0 1 - 39 —BCS-28
U1010: CONTROL UNIT (CAN) 0 1 - 39 —BCS-29
Page 5791 of 5883

WCS-76
< SYMPTOM DIAGNOSIS >
THE LIGHT REMINDER WARNING DOES NOT SOUND
SYMPTOM DIAGNOSIS
THE LIGHT REMINDER WARNING DOES NOT SOUND
DescriptionINFOID:0000000001722956
Light reminder warning does not sound even though headlamp is illuminated.
Diagnosis ProcedureINFOID:0000000001722957
1.CHECK COMBINATION SWITCH (LIGHTING SWITCH) OPERATION
Check that the headlamps operate normally by operating the combination switch (lighting switch).
Do they operate normally?
YES >> GO TO 2
NO >> Refer to EXL-5, "
Work Flow".
2.CHECK FRONT DOOR SWITCH (DRIVER SIDE) SIGNAL CIRCUIT
Perform inspection of the front door switch (driver side) signal circuit.
With Intelligent Key, without super lock: DLK-65, "
DRIVER SIDE : Diagnosis Procedure"
With Intelligent Key and super lock: DLK-296, "DRIVER SIDE : Diagnosis Procedure"
Without Intelligent Key and super lock: DLK-499, "DRIVER SIDE : Diagnosis Procedure"
Without Intelligent Key, with super lock: DLK-644, "DRIVER SIDE : Diagnosis Procedure"
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair harness or connector.
3.CHECK FRONT DOOR SWITCH (DRIVER SIDE)
Perform a unit inspection for the front door switch (driver side).
With Intelligent Key, without super lock: DLK-66, "
DRIVER SIDE : Component Inspection"
With Intelligent Key and super lock: DLK-297, "DRIVER SIDE : Component Inspection"
Without Intelligent Key and super lock: DLK-500, "DRIVER SIDE : Component Inspection"
Without Intelligent Key, with super lock: DLK-645, "DRIVER SIDE : Component Inspection"
Is the inspection result normal?
YES >> Replace the BCM. Refer to BCS-57, "Removal and Installation of BCM".
NO >> Replace the front door switch (driver side).
Page 5792 of 5883

WCS
THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT SOUND
WCS-77
< SYMPTOM DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT
SOUND
DescriptionINFOID:0000000001722958
Seat belt warning does not sound even though driver seat belt is not fastened.
Seat belt warning sounds even though driver seat belt is fastened.
Diagnosis ProcedureINFOID:0000000001722959
1.CHECK WARNING CHIME OPERATION
1. With key removed from key switch and the front door (driver side) open, turn lighting switch to 1st or 2nd
position.
2. Return lighting switch to off position, and insert key into key switch.
Does warning chime sound for both steps?
YES >> GO TO 2
NO >> Replace combination meter. Refer to MWI-94, "
Removal and Installation".
2.CHECK SEAT BELT WARNING LAMP
1. Turn ignition switch ON.
2. Check the operation of the seat belt warning lamp in the combination meter.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-57, "Removal and Installation of BCM".
NO >> GO TO 3
3.CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
Perform inspection of the seat belt buckle switch circuit. Refer to WCS-24, "
DiagnosisProcedure".
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair harness or connector.
4.CHECK SEAT BELT BUCKLE SWITCH UNIT
Perform a unit inspection for the seat belt buckle switch. Refer to WCS-25, "
Component Inspection".
Is the inspection result normal?
YES >> Replace the combination meter. Refer to MWI-94, "Removal and Installation".
NO >> Replace the seat belt buckle switch (driver side).Seat belt fastened : OFF
Seat belt not fastened : ON