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NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore, after the switch is turned ON,
electrical loads are activated with time delay. This time delay is so short that it cannot be detected by human
senses.
Operation Mode
The combination switch reading function has the operation modes shown below.
1. Normal status
–When BCM is not in sleep status, OUTPUT terminals (1-5) each turn ON-OFF every 10 ms.
2. Sleep status
–When BCM is in sleep status BCM enters low power mode. OUTPUT (1 - 5) turn ON-OFF every 22 ms,
and only input from light switch system is accepted.
CAN Communication System DescriptionEKS00P4W
Refer toLAN-23, "CAN COMMUNICATION".
PKIC0489E
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SchematicEKS00P4X
MKWA3595E
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Wiring Diagram — WIPER —
EKS00P4Y
MKWA3673E
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MKWA3269E
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MKWA3596E
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Terminals and Reference Values for BCMEKS00P4Z
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
3 Y Ignition switch (ON) ON — Battery voltage
6 G Combination switch output 3 ONLighting, turn, wiper OFF
Wiper dial position 4
7 GR Combination switch output 4 ONLighting, turn, wiper OFF
Wiper dial position 4
8 LG Combination switch output 1 ONLighting, turn, wiper OFF
Wiper dial position 4
9 BR Combination switch output 2 ONLighting, turn, wiper OFF
Wiper dial position 4
10 O Combination switch output 5 ONLighting, turn, wiper OFF
Wiper dial position 4
21 P CAN-L—— —
22 L CAN-H—— —
24 R Light and rain sensor signal — Ignition switchON
OFF Battery voltage
36 P Combination switch input 5 ONLighting, turn, wiper OFF
Wiper dial position 4
Approx. 0V 37 L Combination switch input 2 ONLighting, turn, wiper OFF
Wiper dial position 4
38 V Combination switch input 3 ONLighting, turn, wiper OFF
Wiper dial position 4
39 SB Combination switch input 4 ONLighting, turn, wiper OFF
Wiper dial position 4
40 R Combination switch input 1 ONLighting, turn, wiper OFF
Wiper dial position 4
42 V Room lamp power supply OFF — Battery voltage
55 B Ground ON — Approx. 0V
57 W Battery power supply (fusible link) OFF — Battery voltage
PKIB4958J
PKIC1618E
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Terminals and Reference Values for IPDM E/R
EKS00P50
How To Proceed With Trouble DiagnosisEKS00P51
1. Confirm the trouble symptom or customer complaint.
2. Understand the operation description and function description. Refer toWW-4, "
System Description".
3. Perform preliminary inspection. Refer toWW-16, "
Preliminary Inspection".
4. According to the trouble diagnosis chart, repair or replace the cause of malfunction.
5. Does wiper function operate normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
Preliminary InspectionEKS00P52
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1.CHECK FUSE OR FUSIBLE LINK
Check for blown fuses or fusible link.
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of problem before installing new fuse or
fusible link. Refer toPG-4, "
POWER SUPPLY ROUTING CIRCUIT".
Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
32 GR Low speed signal ON Wiper switchOFF Approx. 0V
LO Battery voltage
35 L High speed signal ON Wiper switchOFF Approx. 0V
HI Battery voltage
38 B Ground ON — Approx. 0V
39 L CAN-H—— —
40 P CAN-L—— —
43 W Wiper auto stop signal ONWiper operating Battery voltage
Wiper stopped Approx. 0V
59 B Ground ON — Approx. 0V
Unit Power source Fuse and fusible link No.
Front washer motor Ignition ON or START 15
Front wiper main relay Battery 39
BCMIgnition ON or START 1
Battery G
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2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Terminal Ignition switch position
(+)
(-) OFF ACC ON
BCM
connectorTerminal
M42 3
Ground0V 0VBattery
voltage
M44 57Battery
voltageBattery
voltageBattery
voltage
SKIB6233E
BCM connector Terminal
GroundContinuity
M44 55 Yes
SKIB6293E