Infiniti FX35, FX50 (S51). Manual — part 317

CCS-88

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A14 ECM

C1A14 ECM

Description

INFOID:0000000005501628

• ECM transmits the accelerator pedal position signal, ICC brake switch signal, stop lamp switch signal, ICC

steering switch signal, etc. to ICC sensor integrated unit via CAN communication.

• ECM controls the electric throttle control actuator based on the engine torque demand received from the ICC

sensor integrated unit via CAN communication.

DTC Logic

INFOID:0000000005501629

DTC DETECTION LOGIC

NOTE:
If DTC “C1A14” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to

CCS-137,

"DTC Logic"

.

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Operate the ICC system and drive.

CAUTION:

Always drive safely.

3.

Stop the vehicle.

4.

Perform “All DTC Reading” with CONSULT-III.

5.

Check if the “C1A14” is detected as the current malfunction in “Self Diagnostic Result” of “ICC”.

Is “C1A14” detected as the current malfunction?

YES

>> Refer to

CCS-88, "Diagnosis Procedure"

.

NO

>> Refer to

GI-36, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005501630

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A14” in “Self Diagnostic Result” of “ICC”.

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to

CCS-137, "DTC Logic"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS OF ECM

Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”.

Is any DTC detected?

YES

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

EC-541, "DTC Index"

(VQ35HR) or

EC-1179, "DTC Index"

(VK50VE).

NO

>> Replace the ICC sensor integrated unit. Refer to

CCS-184, "Exploded View"

.

Special Repair Requirement

INFOID:0000000005501631

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

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A14

(14)

ECM CIRCUIT

If ECM is malfunctioning

• Accelerator pedal position sensor
• ECM
• ICC sensor integrated unit

CCS

C1A14 ECM

CCS-89

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

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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 ICC SYSTEM

1.

Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-18, "ACTION TEST : Description"

for action test.)

2.

Check that the ICC system is normal.

>> WORK END

CCS-90

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A15 GEAR POSITION

C1A15 GEAR POSITION

Description

INFOID:0000000005501632

ICC sensor integrated unit judges the gear position based on the following signals.
• Shift position signal transmitted from TCM via CAN communication.
• Value of gear ratio calculated from input speed signal transmitted from TCM via CAN communication.
• Value of gear ratio calculated from the vehicle speed signal transmitted from ABS actuator and electric unit

(control unit) via CAN communication.

DTC Logic

INFOID:0000000005501633

DTC DETECTION LOGIC

NOTE:
If DTC “C1A15” is detected along with DTC “U1000”, “C1A03”, or “C1A04”, first diagnose the DTC “U1000”,
“C1A03”, or “C1A04”.
• Refer to

CCS-137, "DTC Logic"

for DTC “U1000”.

• Refer to

CCS-57, "DTC Logic"

for DTC “C1A03”.

• Refer to

CCS-59, "DTC Logic"

for DTC “C1A04”.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON.

3.

Drive the vehicle at 10 km/h (6 MPH) or faster for approximately 15 minutes or more.

CAUTION:

Always drive safely.

4.

Stop the vehicle.

5.

Perform “All DTC Reading” with CONSULT-III.

6.

Check if “C1A15” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC”.

Is “C1A15” detected as the current malfunction?

YES

>> Refer to

CCS-90, "Diagnosis Procedure"

.

NO

>> Refer to

GI-36, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005501634

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “C1A03”, “C1A04”, or “U1000” is detected other than “C1A15” 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-162, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK VEHICLE SPEED SIGNAL

Check that “VHCL SPEED SE” operates normally in “DATA MONITOR” of “ICC”.

CAUTION:

Be careful of the vehicle speed.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 7.

DTC

(On board dis-

play)

Trouble diagnosis

name

DTC detecting condition

Possible causes

C1A15

(15)

GEAR POSITION

If a mismatch occurs between a shift posi-
tion signal transmitted from TCM via CAN
communication and the gear position calcu-
lated by ICC sensor integrated unit

• Input speed sensor
• Vehicle speed sensor A/T (output speed

sensor)

• TCM

CCS

C1A15 GEAR POSITION

CCS-91

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

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G

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P

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3.

CHECK GEAR POSITION

Check that “GEAR” operates normally in “DATA MONITOR” of “ICC”.

CAUTION:

Be careful of the vehicle speed.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK GEAR POSITION SIGNAL

Check that “GEAR” operates normally in “DATA MONITOR” of “TRANSMISSION”.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

CHECK INPUT SPEED SENSOR SIGNAL

Check that “INPUT SPEED” operates normally in “DATA MONITOR” of “TRANSMISSION”.
Is the inspection result normal?

YES

>> Replace the ICC sensor integrated unit. Refer to

CCS-184, "Exploded View"

.

NO

>> GO TO 6.

6.

CHECK TCM SELF-DIAGNOSIS RESULTS

1.

Perform “All DTC Reading”.

2.

Check if any DTC is detected in “Self Diagnostic Result” of “TRANSMISSION”.

Is any DTC detected?

YES

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

TM-150, "DTC Index"

(VQ35HR) or

TM-332, "DTC Index"

(VK50VE).

NO

>> Replace the ICC sensor integrated unit. Refer to

CCS-184, "Exploded View"

.

7.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS

1.

Perform “All DTC Reading”.

2.

Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.

Is any DTC detected?

YES

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

BRC-119, "DTC Index"

.

NO

>> Replace the ICC sensor integrated unit. Refer to

CCS-184, "Exploded View"

.

Special Repair Requirement

INFOID:0000000005501635

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 ICC SYSTEM

1.

Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to

CCS-18, "ACTION TEST : Description"

for action test.)

2.

Check that the ICC system is normal.