Infiniti FX35, FX50 (S51). Manual — part 348

CCS-212

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A00 CONTROL UNIT

2.

CHECK DCA SYSTEM

1.

Erase the “self-diagnosis results”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-191, "ACTION TEST : Description"

for action test.)

2.

Check that the DCA system is normal.

>> WORK END

CCS

C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

CCS-213

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

Description

INFOID:0000000005501789

The ICC sensor integrated unit controls the system with the ignition power supply.

DTC Logic

INFOID:0000000005501790

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the DCA system ON.

3.

Perform “All DTC Reading” with CONSULT-III.

4.

Check if the “C1A01” or “C1A02” is detected as the current malfunction in self-diagnosis results of “ICC”.

Is “C1A01” or “C1A02” detected as the current malfunction?

YES

>> Refer to

CCS-213, "Diagnosis Procedure"

.

NO

>> Refer to

GI-36, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005501791

1.

CHECK ICC SENSOR INTEGRATED UNIT POWER SUPPLY AND GROUND CIRCUIT

Check power supply and ground circuit of ICC sensor integrated unit. Refer to

CCS-318, "ICC SENSOR INTE-

GRATED UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the ICC sensor integrated unit. Refer to

CCS-380, "Exploded View"

.

NO

>> Repair or replace the malfunctioning parts.

Special Repair Requirement

INFOID:0000000005501792

DESCRIPTION

Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed.
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit

SPECIAL REPAIR REQUIREMENT

1.

LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to

CCS-13, "LASER BEAM AIMING

ADJUSTMENT : Description"

.

>> GO TO 2.

2.

CHECK DCA SYSTEM

1.

Erase the “self-diagnosis results”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-191, "ACTION TEST : Description"

for action test.)

2.

Check that the DCA system is normal.

DTC

(On board dis-

play)

Trouble diagnosis

name

DTC detecting condition

Possible causes

C1A01

(1)

POWER SUPPLY
CIR

ICC sensor integrated unit power supply voltage
is excessively low (less than 8 V).

• Connector, harness, fuse
• ICC sensor integrated unit

C1A02

(2)

POWER SUPPLY
CIR 2

ICC sensor integrated unit power supply voltage
is excessively high (more than 19 V).

CCS-214

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2

>> WORK END

CCS

C1A03 VEHICLE SPEED SENSOR

CCS-215

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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C1A03 VEHICLE SPEED SENSOR

Description

INFOID:0000000005501793

The ICC sensor integrated unit receives the vehicle speed signal (wheel speed) from ABS actuator and elec-
tric unit (control unit) and the A/T vehicle speed sensor signal (output shaft revolution signal) from TCM via
CAN communication.

DTC Logic

INFOID:0000000005501794

DTC DETECTION LOGIC

NOTE:
If DTC “C1A03” is detected along with DTC “U1000” or “C1A04”, first diagnose the DTC “U1000” or “C1A04”.
• Refer to

CCS-313, "ICC SENSOR INTEGRATED UNIT : DTC Logic"

for DTC “U1000”.

• Refer to

CCS-217, "DTC Logic"

for DTC “C1A04”.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the DCA system ON.

3.

Drive the vehicle at 30 km/h (19 MPH) or more.

CAUTION:

Always drive safely.

4.

Stop the vehicle.

5.

Perform “All DTC Reading” with CONSULT-III.

6.

Check if the “C1A03” is detected as the current malfunction in self-diagnosis results of “ICC”.

Is “C1A03” detected as the current malfunction?

YES

>> Refer to

CCS-215, "Diagnosis Procedure"

.

NO

>> Refer to

GI-36, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005501795

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “C1A04” or “U1000” is detected other than “C1A03” in “Self Diagnostic Result” of “ICC”.
Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

CCS-341, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK DATA MONITOR

1.

Start the engine.

2.

Drive the vehicle.

3.

Check that the value of “VHCL SPD AT” is almost the same as the value of “VHCL SPEED SE” in “DATA
MONITOR” of “ICC”.

CAUTION:

Be careful of the vehicle speed.

DTC

(On board

display)

Trouble diagnosis

name

DTC detecting condition

Possible causes

C1A03

(3)

VHCL SPEED SE
CIRC

If the vehicle speed signal (wheel speed) from
ABS actuator and electric unit (control unit) and
the A/T vehicle speed sensor signal (output
shaft revolution signal) from TCM, received by
the ICC sensor integrated unit via CAN commu-
nication, are inconsistent

• Wheel speed sensor
• ABS actuator and electric unit (control

unit)

• Vehicle speed sensor A/T (output speed

sensor)

• TCM
• ICC sensor integrated unit