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EXL-20
< FUNCTION DIAGNOSIS >
TRAILER TOW
Component Parts Location
INFOID:0000000005867519
Component DescriptionINFOID:0000000005867520
1. BCM M18, M19, M20 (view with instru- ment panel removed) 2. IPDM E/R E119, E122, E123, E124 3. Combination meter M24, M25
4. Combination switch (lighting and turn signal switch) M28 5. Trailer tow relay 1 M51 (view with
steering member removed) 6. Battery
7. Trailer turn relay LH E156 8. Trailer turn relay RH E157 9. Trailer tow relay 2 E140
10. Stop lamp switch E38 (column shift), E42 (floor shift)
AWLIA1772ZZ
Part name Description
BCM • Receives lighting and turn signal requests from combination
switch.
• Receives stop lamp signal requests from combination meter via CAN communication.
• Sends lighting signal request to the IPDM E/R to control the tail lamp relay via CAN communication.
• Sends turn/hazard/brake control signal to the trailer turn relays.
IPDM E/R Activates the tail lamp relay upon request from the BCM via CAN
communication.
Revision: December 20092009 QX56
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TRAILER TOWEXL-21
< FUNCTION DIAGNOSIS >
C
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M A
B
EXL
N
O P
Combination meter • Receives stop lamp switch signal from stop lamp switch.
• Sends stop lamp signal request to the BCM via CAN communi-
cation.
Combination switch (lighting and turn signal switch) Outputs lighting and turn signal requests to the BCM.
Revision: December 20092009 QX56
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EXL-100
< COMPONENT DIAGNOSIS >
TRAILER TOW
TRAILER TOW
Wiring DiagramINFOID:0000000003776207
AALWA0200GB
Revision: December 20092009 QX56
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TRAILER TOWEXL-101
< COMPONENT DIAGNOSIS >
C
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M A
B
EXL
N
O P
ABLIA0111GB
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EXL-102
< COMPONENT DIAGNOSIS >
TRAILER TOW
ABLIA0112GB
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TRAILER TOWEXL-103
< COMPONENT DIAGNOSIS >
C
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G H
I
J
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M A
B
EXL
N
O P
ABLIA0113GB
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EXL-104
< COMPONENT DIAGNOSIS >
TRAILER TOW
ABLIA0114GB
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TRAILER TOWEXL-105
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
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M A
B
EXL
N
O P
AALIA0084GB
Revision: December 20092009 QX56
