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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"

PERFORM DTC CONFIRMATION PROCEDURE

Start the engine.

Operate the ICC system and drive.

CAUTION:

Always drive safely.

Stop the vehicle.

Perform “All DTC Reading” with CONSULT-III.

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"

>> Refer to

GI-36, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000005501630

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"

>> GO TO 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).

>> 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)]

SPECIAL REPAIR REQUIREMENT

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.

CHECK ICC SYSTEM

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.)

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

PERFORM DTC CONFIRMATION PROCEDURE

Start the engine.

Turn the MAIN switch of ICC system ON.

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

CAUTION:

Always drive safely.

Stop the vehicle.

Perform “All DTC Reading” with CONSULT-III.

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"

>> Refer to

GI-36, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000005501634

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"

>> GO TO 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.

>> 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