Content .. 686 687 688 689 ..

Infiniti G37 Coupe. Manual - part 688

EXL-172

< ECU DIAGNOSIS >

[XENON TYPE]

AFS CONTROL UNIT

Fail Safe

INFOID:0000000001607804

DTC Inspection Priority Chart

INFOID:0000000001607805

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

DTC

Fail-safe

AFS OFF indica-

tor lamp

Cancellation

CAN COMM CIRCUIT
[U1000]

• Right and left swivel motors stop at the position when

DTC is detected.

• Right and left aiming motors stop at the position when

DTC is detected.

Blinks 1 second
each.

The ignition switch
OFF

CONTROL UNIT (CAN)
[U1010]

• Right and left swivel motors stop at the position when

DTC is detected.

• Right and left aiming motors stop at the position when

DTC is detected.

Blinks 1 second
each.

The ignition switch
OFF

SWIVEL ACTUATOR
[RH, LH]
[B2503, B2504]

• Right and left swivel motors stop at the position when

DTC is detected.

• The signal, approximately 2 V decreased from the level-

izer signal when DTC detected, is output.

Blinks 1 second
each.

The ignition switch
OFF

HI SEN UNUSUAL [RR]
[B2514]

• Right and left aiming motors stop at the position when

DTC is detected.

—

The ignition switch
OFF

ST ANG SEN SIG
[C0126]

• Right and left swivel motor swivel angle returns to 0

and

fixed.

Blinks 1 second
each.

The ignition switch
OFF

SHIFT SIG [P, R]
[B2516]

• Right and left swivel motor swivel angle returns to 0

and

fixed.

Blinks 1 second
each.

The ignition switch
OFF

VEHICLE SPEED SIG
[B2517]

• Right and left swivel motor swivel angle returns to 0

and

fixed.

• Right and left aiming motors stop at the position when

DTC is detected.

Blinks 1 second
each.

The ignition switch
OFF

LEVELIZER CALIB
[B2519]

• Right and left aiming motors stop at the position when

DTC is detected.

—

When the levelizer
adjustment is com-
pleted.

ST ANGLE SEN CALIB
[C0428]

• Right and left swivel motor swivel angle returns to 0

and

fixed.

Blinks 1 second
each.

When the steering
angle sensor neutral
position registration is
competed

ECU CIRC
[B2521]

• Right and left swivel motors stop at the position when

DTC is detected.

• Right and left aiming motors stop at the position when

DTC is detected.

Blinks 1 second
each.

The ignition switch
OFF

Priority

Detected items (DTC)

• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)

• B2519 LEVELIZER CALIB
• B2521 ECU CIRC
• C0428 ST ANG SEN CALIB

• B2503 SWIVEL ACTUATOR [RH]
• B2504 SWIVEL ACTUATOR [LH]
• B2514 HI SEN UNUSUAL [RR]
• B2516 SHIFT SIG [P, R]
• B2517 VEHICLE SPEED SIG
• C0126 ST ANG SEN SIG

AFS CONTROL UNIT

EXL-173

< ECU DIAGNOSIS >

[XENON TYPE]

EXL

DTC Index

INFOID:0000000001607806

: Applicable

CONSULT indication

Fail-safe

AFS OFF indicator

lamp

Reference

U1000: CAN COMM CIRCUIT

EXL-58, "Description"

U1010: CONTROL UNIT (CAN)

EXL-58, "DTC Logic"

B2503, B2504: SWIVEL ACTUATOR [RH, LH]

EXL-42, "Description"

B2514: HI SEN UNUSUAL [RR]

EXL-47, "Description"

B2516: SHIFT SIG [P, R]

EXL-50, "Description"

B2517: VEHICLE SPEED SIG

EXL-51, "Description"

B2519: LEVELIZER CALIB

EXL-52, "Description"

B2521: ECU CIRC

EXL-53, "Description"

C0126: ST ANG SEN SIG

EXL-56, "Description"

C0428: ST ANGLE SEN CALIB

EXL-57, "Description"

EXL-174

< SYMPTOM DIAGNOSIS >

[XENON TYPE]

EXTERIOR LIGHTING SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

EXTERIOR LIGHTING SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000001604705

CAUTION:

Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.

Symptom

Possible cause

Inspection item

Headlamp does not
switch to the high beam.

One side

• Fuse
• Harness between IPDM E/R

and the front combination lamp

• Front combination lamp

(High beam solenoid)

• IPDM E/R

Headlamp (HI) circuit
Refer to

EXL-64

Both sides

Symptom diagnosis
"BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to

EXL-178

High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.)

• Combination meter
• Unified meter and A/C amp.

• Unified meter and A/C amp.

Data monitor "HI-BEAM IND"

• BCM (HEAD LAMP)

Active test "HEADLAMP"

Headlamp does not
switch to the low beam.

One side

Front combination lamp (High
beam solenoid)

—

Both sides

• Combination switch
• Harness between the combina-

tion switch and BCM

• BCM

Combination switch
Refer to

BCS-77

High beam request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "HL HI REQ"

IPDM E/R

—

Headlamp is not turned
ON.

One side

• Fuse
• Xenon bulb
• Harness between IPDM E/R

and the front combination lamp

• Front combination lamp (xenon

headlamp)

• IPDM E/R

Headlamp (LO) circuit
Refer to

EXL-66

Both sides

Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to

EXL-179

Headlamp is not turned
OFF.

When the ignition
switch is turned ON

The ignition switch is
turned OFF (After acti-
vating the battery sav-
er).

IPDM E/R

—

Headlamp is not turned ON/OFF with the lighting
switch AUTO.

• Combination switch
• Harness between the combina-

tion switch and BCM

• BCM

Combination switch
Refer to

BCS-77

• Optical sensor
• Harness between the optical

sensor and BCM

• BCM

Optical sensor
Refer to

EXL-79

EXTERIOR LIGHTING SYSTEM SYMPTOMS

EXL-175

< SYMPTOM DIAGNOSIS >

[XENON TYPE]

EXL

Front fog lamp is not
turned ON.

One side

• Front fog lamp bulb
• Harness between IPDM E/R

and the front combination lamp

• Front combination lamp
• IPDM E/R

Front fog lamp circuit
Refer to

EXL-72

Both side

Symptom diagnosis
"BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON"
Refer to

EXL-181

Front fog lamp is not turned ON.

Parking lamp is not turned ON.

• Fuse
• Parking lamp bulb
• Harness between IPDM E/R

and the front combination lamp

• Front combination lamp
• IPDM E/R

Parking lamp circuit
Refer to

EXL-74

Tail lamp is not turned ON.

• Harness between IPDM E/R

and the rear combination lamp

• Rear combination lamp

Tail lamp circuit
Refer to

EXL-84

License plate lamp is not turned ON.

• Harness between IPDM E/R

and the license plate lamp

• License plate lamp

License plate lamp circuit
Refer to

EXL-86

Tail lamp and the license plate lamp are not turned
ON.

• Fuse
• Harness between IPDM E/R

and the rear combination lamp

• IPDM E/R

Tail lamp circuit
Refer to

EXL-84

• Parking lamp, the tail lamp and the license plate

lamp are not turned ON.

• Parking lamp, the tail lamp and the license plate

lamp are not turned OFF.

(Each illumination is turned ON/OFF.)

Symptom diagnosis
"PARKING, LICENSE PLATE AND TAIL LAMPS ARE NOT TURNED
ON"
Refer to

EXL-180

Turn signal lamp does not
blink.

Indicator lamp is nor-
mal.
(The applicable side
performs the high flash-
er activation.

• Harness between BCM and

each turn signal lamp

• Turn signal lamp bulb

Turn signal lamp circuit
Refer to

EXL-76

Indicator lamp is includ-
ed

• Combination switch
• Harness between the combina-

tion switch and BCM

• BCM

Combination switch
Refer to

BCS-77

Turn signal indicator lamp
does not blink.
(The turn signal indicator
lamp is normal.)

One side

Combination meter

—

Both sides
(Always)

• Turn signal indicator lamp sig-

nal

- Unified meter and A/C amp.
- BCM
• Combination meter

• Unified meter and A/C amp.

Data monitor "TURN IND"

• BCM (FLASHER)

Active test "FLASHER"

Both sides
(Only when activating
the hazard warning
lamp with the ignition
switch OFF)

• The combination meter power

supply and the ground circuit

• Combination meter

Combination meter
Power supply and the ground circuit
Refer to

MWI-50

• Hazard warning lamp does not activate.
• Hazard warning lamp continues activating.
(Turn signal is normal.)

• Hazard switch
• Harness between the hazard

switch and BCM

• BCM

Hazard switch
Refer to

EXL-82

Symptom

Possible cause

Inspection item

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