ECU INFINITI FX35 2004 Service Manual

BRC-26
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
CONSULT-II BASIC OPERATION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
Diagnostic
test modeFunction Reference
WORK SUP-
PORTThis mode enables a technician to adjust some devices faster and more accurately
by following the indications on CONSULT-II.BRC-6, "
Adjustment of Steer-
ing Angle Sensor Neutral
Position"
SELF-DIAG-
NOSTIC
RESULTSSelf-diagnostic results can be read and erased quickly.BRC-27, "
SELF-DIAGNOSIS"
DATA MONI-
TORInput/Output data in the ABS actuator and electric unit (control unit) can be read.BRC-30, "DATA MONITOR"
CAN DIAG
SUPPORT
MNTRThe results of transmit/receive diagnosis of communication can be read. —
ACTIVE TESTDiagnostic Test Mode in which CONSULT-II drives some actuators apart from the
ABS actuator and electric unit (control unit) and also shifts some parameters in a
specified range.BRC-33, "
ACTIVE TEST"
FUNCTION
TESTConducted by CONSULT-II instead of a technician to determine whether each sys-
tem is “OK” or “NG”.—
ECU PART
NUMBERABS actuator and electric unit (control unit) part number can be read. —
SKIA3098E
PKIA2102E

TROUBLE DIAGNOSIS
BRC-31
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on
ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat
the operation from step 1.
4. Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
5. When “START” is touched, the data monitor screen is displayed.
Display Item List
Item
(Unit)Data monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
GEAR×××Gear position judged by PNP
switch signal is displayed.
FR RH SENSOR
(km/h, MPH)×××Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
FR LH SENSOR
(km/h, MPH)×××Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
RR RH SENSOR
(km/h, MPH)×××Wheel speed calculated by rear
RH wheel sensor signal is dis-
played.
RR LH SENSOR
(km/h, MPH)×××Wheel speed calculated by rear
LH wheel sensor signal is dis-
played.
BATTERY VOLT
(V)×××Voltage supplied to ABS actuator
and electric unit (control unit) is
displayed.
SLCT LVR POSI×××Shift position judged by PNP
switch signal.
ACCEL POS SIG
(%)×––Throttle valve open/close status
judged by CAN communication
signal is displayed.
ENGINE SPEED
(rpm)×××Engine speed judged by CAN
communication signal is displayed.
STR ANGLE SIG
(deg)×––Steering angle detected by steer-
ing angle sensor is displayed.
YAW RATE SEN
(d/s)××–Yaw rate detected by yaw rate
sensor is displayed.
DECEL G-SEN (AWD model)
(G)×××Longitudinal acceleration detected
by decel G-sensor is displayed.
SIDE G-SENSOR
(m/s
2 )×––Lateral acceleration detected by
side G-sensor is displayed.
PRESS SENSOR
(bar)×––Brake fluid pressure detected by
pressure sensor is displayed.
STOP LAMP SW
(ON/OFF)×××Stop lamp switch (ON/OFF) status
is displayed.
OFF SW
(ON/OFF) ×× ×VDC OFF switch (ON/OFF) sta-
tus is displayed.
ABS WARN LAMP
(ON/OFF)–××ABS warning lamp (ON/OFF) sta-
tus is displayed.
SLIP LAMP
(ON/OFF)–××SLIP indicator lamp (ON/OFF) sta-
tus is displayed.
FR LH IN SOL
(ON/OFF)–××Front LH IN ABS solenoid (ON/
OFF) status is displayed.

BRC-32
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
FR LH OUT SOL
(ON/OFF)–××Front LH OUT ABS solenoid (ON/
OFF) status is displayed.
RR RH IN SOL
(ON/OFF)–××Rear RH IN ABS solenoid (ON/
OFF) status is displayed.
RR RH OUT SOL
(ON/OFF) –××Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.
FR RH IN SOL
(ON/OFF)–××Front RH IN ABS solenoid (ON/
OFF) status is displayed.
FR RH OUT SOL
(ON/OFF)–××Front RH OUT ABS solenoid (ON/
OFF) status is displayed.
RR LH IN SOL
(ON/OFF)–××Rear LH IN ABS solenoid (ON/
OFF) status is displayed.
RR LH OUT SOL
(ON/OFF)–××Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.
OFF LAMP
(ON/OFF)–××OFF Lamp (ON/OFF) status is dis-
played.
MOTOR RELAY
(ON/OFF)–××ABS motor relay signal (ON/OFF)
status is displayed.
ACTUATOR RLY
(ON/OFF)– ×× ABS actuator relay signal (ON/
OFF) status is displayed.
CV1
(ON/OFF)––×Primary side switch-over solenoid
valve 1 (cut valve 1) (ON/OFF)
status is displayed.
CV2
(ON/OFF)––×Secondary side switch-over sole-
noid valve 2 (cut-valve 2) (ON/
OFF) status is displayed.
SV1
(ON/OFF)––×Primary side switch-over solenoid
valve 1 (suction valve 1) (ON/OFF)
status is displayed.
SV2
(ON/OFF)––×Secondary side switch-over sole-
noid valve 2 (suction valve 2) (ON/
OFF) status is displayed.
VDC FAIL SIG
(ON/OFF)––×VDC fail signal (ON/OFF) status is
displayed.
TCS FAIL SIG
(ON/OFF)––×TCS fail signal (ON/OFF) status is
displayed.
ABS FAIL SIG
(ON/OFF)––×ABS fail signal (ON/OFF) status is
displayed.
EBD FAIL SIG
(ON/OFF)––×EBD fail signal (ON/OFF) status is
displayed.
FLUID LEV SW
(ON/OFF)×––Brake fluid level switch (ON/OFF)
status is displayed.
EBD SIGNAL
(ON/OFF)––×EBD operation (ON/OFF) status is
displayed.
ABS SIGNAL
(ON/OFF)––×ABS operation (ON/OFF) status is
displayed.
TCS SIGNAL
(ON/OFF)––×TCS operation (ON/OFF) status is
displayed.
VDC SIGNAL
(ON/OFF)––×VDC operation (ON/OFF) status is
displayed.
EBD WARN LAMP
(ON/OFF)––×Brake warning lamp (ON/OFF)
status is displayed. (Note) Item
(Unit)Data monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU

TROUBLE DIAGNOSIS
BRC-33
[VDC/TCS/ABS]
C
D
E
G
H
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J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
×:Applicable
–:Not applicable
Note: Serves as EBD warning lamp.
ACTIVE TEST
CAUTION:

Do not perform active test while driving.

Make sure to completely bleed air from the brake system.

Active test cannot be performed when EBD, ABS, TCS or VDC operation is malfunction.

ABS and brake warning lamps turn on during the active test.
Operation Procedure
1. Connect CONSULT-II and CONVERTER to data link connector and start engine.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
2. Touch “START (NISSAN BASED VHCL) ” on the display screen.
3. Touch “ABS”.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Touch “ACTIVE TEST”.
5. The test item selection screen is displayed.
6. Touch necessary test item.
7. With the “MAIN SIGNALS” display shown in reverse, touch “START”.
8. The “ACTIVE TEST” screen will be displayed, so perform the following test.
Solenoid Valve Operation Chart
CRANKING SIG
(ON/OFF)––×Cranking condition (ON/OFF) sta-
tus is displayed.
4WD FAIL REQ
(ON/OFF)––×AWD fail-safe signal (ON/OFF)
status is displayed.
2WD/4WD
(2WD/4WD)––×Distinguish 2WD and AWD Item
(Unit)Data monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
SFIA1172E
OperationABS solenoid valve ABS solenoid valve (ACT)
UP KEEP DOWN UPACTUATOR
UPACTUATOR
KEEP
FR RH IN SOL OFF ON ON OFF OFF OFF
FR RH OUT SOL OFF OFF ON* OFF OFF OFF
FR LH IN SOL OFF ON ON OFF OFF OFF
FR LH OUT SOL OFF OFF ON* OFF OFF OFF
RR RH IN SOL OFF ON ON OFF OFF OFF
RR RH OUT SOL OFF OFF ON* OFF OFF OFF

BRC-46
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Inspection 7: Solenoid and VDC Change-Over Valve SystemAFS001SZ
DTC C1120-C1127, C1164-C1167
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector check terminals for deformation, dis-
connection, looseness, and so on. If any malfunction is found, repair or replace terminal.
2. Securely reconnect connector and perform self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
Self-diagnostic results
FR LH IN ABS SOL
FR LH OUT ABS SOL
RR RH IN ABS SOL
RR RH OUT ABS SOL
FR RH IN ABS SOL
FR RH OUT ABS SOL
RR LH IN ABS SOL
RR LH OUT ABS SOL
CV 1
CV 2
SV 1
SV 2

TROUBLE DIAGNOSIS
BRC-47
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
3. CHECKING SOLENOID POWER AND GROUND
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Check voltage between ABS actuator and electric unit (control
unit) harness connector E56 and ground.
3. Check continuity between ABS actuator and electric unit (control
unit) harness connector E56 and ground.
OK or NG
OK >> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-60, "
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)" .
NG >> Repair or replace harness or connectors.
Inspection 8: Actuator Motor SystemAFS001T0
DTC C1111, C1140
Inspection Procedure
1. CHECK SELF-DIAGNOSIS RESULTS (1)
Check the self-diagnostic results.
Is the above displayed in the self-diagnostic display items?
YES >> GO TO 2.
NO >> Inspection is completed.
2. CHECK SELF-DIAGNOSIS RESULTS (2)
1. Disconnect ABS actuator and electric unit (control unit) connector. Then reconnect it securely.
2. Perform self-diagnosis again.
Do any self-diagnosis item appear?
YES >> GO TO 3.
NO >> Poor connection. Repair or replace the applicable connector.ABS actuator and electric
unit (control unit)
(Harness connector E56)GroundVo l ta g e ( V )
(Approx.)
32 (R) — 12 V
SFIA1196E
ABS actuator and electric
unit (control unit)
(Harness connector E56)Ground Continuity
16 (B) — Yes
47 (B) — Yes
SFIA1197E
Self-diagnostic results
PUMP MOTOR
ACTUATOR RLY

BRC-48
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
3. CHECK ABS MOTOR AND MOTOR RELAY POWER SYSTEM
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Check voltage between ABS actuator and electric unit (control
unit) harness connector E56 and ground.
3. Check continuity between ABS actuator and electric unit (control
unit) harness connector E56 and ground.
OK or NG
OK >> Perform self-diagnosis again. If the same result
appears, replace ABS actuator and electric unit (control
unit). Refer to BRC-60, "
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)" .
NG >> Repair harness or connectors.
Inspection 9: ABS Actuator and Electric Unit (Control Unit) Power Supply and
Ground System
AFS001T1
DTC C1109
Inspection Procedure
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Does
“BATTERY VOLTAGE” appear in self-diagnostic results display?
YES >> GO TO 2.
NO >> INSPECTION END
2. STARTING INSPECTION
1. Disconnect ABS actuator and electric unit (control unit) connector. Then reconnect it securely.
2. Perform self-diagnosis.
Do any self-diagnosis item appear?
YES >> GO TO 3.
NO >> Poor connection. Repair or replace connector.ABS actuator and electric
unit (control unit)
(Harness connector E56)GroundVoltage (V)
(Approx.)
1 (Y)
32 (R)—12 V
SFIA1198E
ABS actuator and electric
unit (control unit)
(Harness connector E56)Ground Continuity
16 (B) — Yes
47 (B) — Yes
SFIA1197E
Self-diagnostic results
BATTERY VOLTAGE

BRC-50
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Inspection 10: Stop Lamp Switch SystemAFS001T2
DTC C1116
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis display item?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect stop lamp switch connector and ABS actuator and electric unit (control unit) connector E56
and check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found,
repair or replace terminal.
2. Securely reconnect connectors.
3. perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF and disconnect stop lamp switch con-
nector and ABS actuator and electric unit (control unit) connec-
tor.
2. Check continuity between stop lamp switch harness connector
E210 and ABS actuator and electric unit (control unit) harness
connector E56.
OK or NG
OK >> Connect connectors and conduct a ABS actuator and electric unit (control unit) self-diagnosis.
NG >> Open or short in harness between stop lamp switch and ABS actuator and electric unit (control
unit). Repair or replace applied harness.
Self-diagnostic results
STOP LAMP SW
SFIA1436E
ABS actuator and electric unit
(control unit) (Harness connector E56)Stop lamp switch
(Harness connector E210) Continuity
41 (P) 2 (P) Yes

TROUBLE DIAGNOSIS
BRC-51
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
Inspection 11: Brake Fluid Level Switch SystemAFS001T4
DTC C1155
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
1. Check fluid level in brake fluid reservoir tank. If the level is low, add brake fluid.
2. Clear the stored self-diagnostic results and check self-diagnosis results.
Is the above displayed in the self-diagnosis display item?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect brake fluid level switch connector and ABS actuator and electric unit (control unit) connector
and check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found,
repair or replace terminal.
2. Securely reconnect connectors and Re-perform self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3. CHECK HARNESS BETWEEN BRAKE FLUID LEVEL SWITCH AND ABS ACTUATOR AND ELEC-
TRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF and disconnect brake fluid level switch
connector and ABS actuator and electric unit (control unit) con-
nector.
2. Check continuity between brake fluid level switch harness con-
nector E52 and ABS actuator and electric unit (control unit) har-
ness connector E56.
OK or NG
OK >> Connect connectors and perform a ABS actuator and electric unit (control unit) self-diagnosis.
NG >> If open or short in harness, repair or replace applied harness.
Self-diagnostic results
BR FLUID LEVEL LOW
SFIA1193E
ABS actuator and electric unit
(control unit)
(Harness connector E56)Brake fluid level switch
(Harness connector E52)Continuity
8 (GY) 1 (GY) Yes
8 (GY) Ground No
Ground 2 (B) Yes

BRC-56
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
5. CHECK SELF-DIAGNOSTIC RESULTS 1
Perform self-diagnosis of ABS actuator and electric unit (control unit).
Are self-diagnosis items displayed?
YES >> Check the corresponding items, make repairs, and re-perform ABS actuator and electric unit (con-
trol unit) self-diagnosis.
NO >> GO TO 6.
6. CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector E56 and ECM connector, check termi-
nals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace
connector.
2. Securely reconnect connector and perform self-diagnosis.
OK or NG
OK >> If poor connect, damaged, open or short circuit is found, repair or replace connector terminal.
NG >> GO TO 7.
7. CHECK SELF-DIAGNOSTIC RESULTS 2
Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
Are self-diagnosis items displayed?
YES >> Repair or replace malfunctioning items.
NO >> GO TO 8.
8. CHECK CIRCUIT BETWEEN ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) AND ECM
Check CAN communication system. Refer to BRC-53, "
Inspection 14: CAN Communication System" .
OK or NG
OK >> INSPECTION END
NG >> Connect connectors, and re-perform ABS actuator and electric unit (control unit) self-diagnosis.