Page 3009 of 5883

EXL-8
< FUNCTION DIAGNOSIS >
HEADLAMP (HALOGEN)
FUNCTION DIAGNOSIS
HEADLAMP (HALOGEN)
System DiagramINFOID:0000000001523225
System DescriptionINFOID:0000000001523226
Control of the headlamp system operation is dependent upon the position of the lighting switch (combination
switch). When the lighting switch is placed in the 2nd position, the BCM (body control module) receives input
requesting the headlamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distri-
bution module engine room) via the CAN communication lines. The CPU (central processing unit) of the IPDM
E/R controls the headlamp high and headlamp low relay coils. When energized, these relays direct power to
the respective headlamps, which then illuminate.
Component Parts LocationINFOID:0000000001523227
Component DescriptionINFOID:0000000001523228
LOW BEAM OPERATION
AWLIA0002GB
1. IPDM E/R E46, E47, E48 2. BCM M16, M17, M18, M19 (view with
glove box removed)3. Combination switch M28
4. Combination meter M24
WKIA5469E
Page 3011 of 5883

EXL-10
< FUNCTION DIAGNOSIS >
HEADLAMP (XENON)
HEADLAMP (XENON)
System DiagramINFOID:0000000001527648
System DescriptionINFOID:0000000001527649
A mobile valve shade type xenon headlamp is used. The xenon headlamp uses one xenon bulb each on the
LH and RH side. The xenon headlamp switches between high beam and low beam by using a high beam
solenoid to move the mobile valve shade over the xenon bulb.
Control of the headlamp system is dependent upon the position of the lighting switch (combination switch).
When the lighting switch is placed in the 2nd position, the BCM (body control module) receives input request-
ing the headlamps to illuminate. This input is then communicated to the IPDM E/R (intelligent power distribu-
tion model engine room) via the CAN communication lines. The CPU (central processing unit) of the IPDM E/
R controls the headlamp high and headlamp low relay coils. When energized, these relays direct power to the
respective headlamps, which then illuminate.
Component Parts LocationINFOID:0000000001527650
AWLIA0036GB
1. IPDM E/R E46, E47, E48 2. BCM M16, M17, M18, M19 (view with
glove box removed)3. Combination switch M28
4. Combination meter M24
WKIA5469E
Page 3013 of 5883
EXL-12
< FUNCTION DIAGNOSIS >
AUTO LIGHT SYSTEM
AUTO LIGHT SYSTEM
System DiagramINFOID:0000000001523233
System DescriptionINFOID:0000000001523234
When the lighting switch is in AUTO position, it automatically turns ON/OFF the exterior lamps in accordance
with the ambient light levels.
The light and rain sensor detects ambient brightness and converts light (lux) to voltage which is output to the
BCM. The BCM (Body Control Module) controls auto light operation according to the signal inputs from the
light and rain sensor, lighting switch and ignition switch. If conditions are met, the BCM sends a request (via
CAN communication lines) to the IPDM E/R (Intelligent Power Distribution Module Engine Room) to activate
the exterior lamps.
Component Parts LocationINFOID:0000000001523235
AWLIA0021GB
1. IPDM E/R E46, E47, E48 2. BCM M16, M17, M18, M19, M21 (view
with glove box removed)3. Combination switch M28
4. Light and rain sensor R11
AWLIA0022GB
Page 3019 of 5883
EXL-18
< FUNCTION DIAGNOSIS >
DAYTIME LIGHT SYSTEM
Component Description
INFOID:0000000001527657
Part Description
BCM Monitors lighting switch position, engine running status and parking brake status to
determine if conditions are set for daytime light system operation.
Requests the IPDM E/R via CAN communication lines to ground the daytime light
relay coil.
IPDM E/RControls ground to the daytime light relay coil based on requests from the BCM (via
CAN communication lines).
Combination switch
(Lighting & turn signal switch)Refer to XX-XX, "*****"
.
Combination meterMonitors engine running status and forwards that information to the BCM via CAN
communication lines.
Page 3020 of 5883
FRONT FOG LAMP
EXL-19
< FUNCTION DIAGNOSIS >
C
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FRONT FOG LAMP
System DiagramINFOID:0000000001523237
System DescriptionINFOID:0000000001523238
The BCM (Body Control Module) controls front fog lamp operation based on input from the lighting switch
(combination switch). The BCM requests (via CAN communication lines) the IPDM E/R (Intelligent Power Dis-
tribution Module Engine Room) to activate the integrated front fog lamp relay and requests the combination
meter to illuminate the front fog lamp light.
Component Parts LocationINFOID:0000000001523239
AWLIA0037GB
1. IPDM E/R E46, E47, E48 2. BCM M16, M17, M18, M19 (view with
glove box removed)3. Combination switch M28
4. Combination meter M24
WKIA5469E
Page 3025 of 5883
EXL-24
< FUNCTION DIAGNOSIS >
PARKING, LICENSE PLATE AND TAIL LAMPS
PARKING, LICENSE PLATE AND TAIL LAMPS
System DiagramINFOID:0000000001523245
WITHOUT DAYTIME LIGHT SYSTEM
WITH DAYTIME LIGHT SYSTEM
System DescriptionINFOID:0000000001523246
The BCM (Body Control Module) controls parking, license plate and tail lamps operation based on lighting
switch (combination switch) input. The BCM requests the IPDM E/R (Intelligent Power Distribution Module
Engine Room) (via CAN communication lines) to activate the tail lamp relay (without daytime light system) or
the daytime light relay (with daytime light system).
AWLIA0031GB
AWLIA0035GB
Page 3033 of 5883
EXL-32
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis ProcedureINFOID:0000000001523255
For BCM power supply and ground circuit information, refer to XX-XX, "*****".
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure
INFOID:0000000001523256
For IPDM E/R power supply and ground circuit information, refer to XX-XX, "*****" .
Page 3034 of 5883

HEADLAMP (HI) CIRCUIT
EXL-33
< COMPONENT DIAGNOSIS >
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HEADLAMP (HI) CIRCUIT
HEADLAMP (HALOGEN)
HEADLAMP (HALOGEN) : DescriptionINFOID:0000000001523259
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp high relay based on
inputs from the BCM via the CAN communication lines. When the headlamp high relay is energized, power
flows through fuses 34 and 35, located in the IPDM E/R. Power then flows to the front combination lamps to
the headlamp high beam.
HEADLAMP (HALOGEN) : Component Function CheckINFOID:0000000001523260
1.CHECK HEADLAMP (HI) OPERATION
WITHOUT CONSULT-III
1. Start IPDM E/R auto active test. Refer to XX-XX, "*****"
.
2. Check that the headlamp switches to the high beam.
NOTE:
HI/LO is repeated 1 second each when using the IPDM E/R auto active test.
CONSULT-III
1. Select "EXTERNAL LAMP" of IPDM E/R active test item.
2. With operating the test items, check that the headlamp switches to the high beam.
Does the headlamp switch to the high beam?
YES >> Headlamp (HI) circuit is normal.
NO >> Refer to EXL-33, "
HEADLAMP (HALOGEN) : Diagnosis Procedure".
HEADLAMP (HALOGEN) : Diagnosis ProcedureINFOID:0000000001523261
1.CHECK HEADLAMP (HI) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2
2.CHECK HEADLAMP (HI) OUTPUT VOLTAGE
CONSULT-III ACTIVE TEST
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector.
3. Turn the ignition switch ON.
4. Select "EXTERNAL LAMP" of IPDM E/R active test item.
5. With EXTERNAL LAMP ON, check the voltage between the
combination lamp connector and ground.HI : Headlamp switches to the high beam.
OFF : Headlamp OFF
Unit Location Fuse No. Capacity
Headlamp HI (LH) IPDM E/R 35 10A
Headlamp HI (RH) IPDM E/R 34 10A
(+)
(−)Voltage
Connector Terminal
LH E25
1 Ground Battery voltage
RH E26
PKIC0960E