Infiniti EX35. Manual - part 379

CCS

C1A14 ECM

CCS-51

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[INTELLIGENT CRUISE CONTROL]

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C1A14 ECM

Description

INFOID:0000000003130064

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

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

• ECM controls the electronic control throttle based on the engine torque demand received from the ICC sen-

sor integrated unit with CAN communication. 

DTC Logic

INFOID:0000000003130065

DTC DETECTION LOGIC

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

CCS-75,

"Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003130066

1.

PERFORM SELF-DIAGNOSIS OF ICC SENSOR INTEGRATED UNIT

1.

Perform self-diagnosis of ICC sensor integrated unit.

2.

Check if DTC “U1000: CAN COMM CIRCUIT” (DTC 100) other than “C1A14: ECM CIRCUIT” (DTC 14) is
detected.

Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CAN COMMUNICATION INSPECTION

Perform the CAN communication system inspection. Repair or replace the applicable item. Refer to 

CCS-75,

"Diagnosis Procedure"

.

>> GO TO 6.

3.

PERFORM SELF-DIAGNOSIS OF ECM

1.

Perform self-diagnosis of ECM.

2.

Check if DTC is detected. Refer to 

EC-514, "DTC Index"

.

Is any DTC detected?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

REPAIR OR REPLACE APPLICABLE ITEM

Repair or replace the applicable item identified by the self-diagnosis result.

>> GO TO 6.

5.

REPLACE ICC SENSOR INTEGRATED UNIT

1.

Replace ICC sensor integrated unit

2.

Adjust laser beam aiming. Refer to 

CCS-8, "LASER BEAM AIMING ADJUSTMENT : Special Repair

Requirement (Preparation)"

.

>> GO TO 6.

DTC No.

(On board 

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A14

(14)

ECM CIRCUIT

If an abnormal condition occurs with ECM.

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

CCS-52

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[INTELLIGENT CRUISE CONTROL]

C1A14 ECM

6.

CHECK ICC SYSTEM

1.

Erase DTC and perform ICC system action test. Then perform self-diagnosis of ICC sensor integrated
unit. (For the details on the ICC system action test, refer to 

CCS-13, "ACTION TEST : Special Repair

Requirement (Vehicle-To-Vehicle Distance Control Mode)"

).

2.

Check that no abnormal condition is present in the ICC system. 

>> INSPECTION END

CCS

C1A15 GEAR POSITION

CCS-53

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C1A15 GEAR POSITION

Description

INFOID:0000000003130067

ICC sensor integrated unit judges gear positions according to the following signals.
• A/T turbine revolution signal transmitted from TCM with CAN communication. 
• Gear ratio calculated from current gear position signal transmitted from TCM with CAN communication.
• Gear ratio calculated from vehicle speed signal transmitted from ABS actuator and electronic unit (control

unit) with CAN communication

DTC Logic

INFOID:0000000003130068

DTC DETECTION LOGIC

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

CCS-75, "Diagnosis Procedure"

.

• DTC “C1A03”: Refer to 

CCS-31, "Diagnosis Procedure"

.

• DTC “C1A04”: Refer to 

CCS-33, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003130069

1.

PERFORM SELF-DIAGNOSIS OF ICC SENSOR INTEGRATED UNIT

1.

Perform self-diagnosis of ICC sensor integrated unit.

2.

Check if DTC “C1A03: VHCL SPEED SE CIRC” (DTC 3), “C1A04: ABS/TCS/VDC CIRC” (DTC 4) or
“U1000: CAN COMM CIRCUIT” (DTC100) other than “C1A15: GEAR POSITION” (DTC 15) is detected.

Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

DIAGNOSIS FOR DETECTED DTC

Perform diagnosis on the detected DTC and repair or replace the applicable item. Refer to 

CCS-85, "DTC

Index"

.

>> GO TO 9.

3.

CHECK VEHICLE SPEED SIGNAL

With CONSULT-III

1.

Start engine.

2.

With “Data Monitor” of “ICC”, check if “VHCL SPEED SE” operates normally.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 8.

4.

CHECK SHIFT GEAR POSITION 

Check if gear positions are correct in A/T.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

DTC No.

(On board 

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A15

(15)

GEAR POSITION

When a mismatch occurs between an A/T tur-
bine revolution signal transmitted from TCM 
with CAN communication and a vehicle speed 
signal transmitted from ABS actuator and elec-
tric unit (control unit)

• A/T turbine revolution sensor
• TCM
• Wheel sensor
• ABS actuator and electric unit (control 

unit)

CCS-54

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[INTELLIGENT CRUISE CONTROL]

C1A15 GEAR POSITION

5.

CHECK TCM GEAR POSITION SIGNAL 

With CONSULT-III

With “Data Monitor” of “A/T”, check if “GEAR” operates normally.
Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

6.

CHECK TCM TURBINE REVOLUTION 

With CONSULT-III

With “Data Monitor” of “A/T”, check if “TURBINE REV” operates normally.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

PERFORM SELF-DIAGNOSIS OF TCM

1.

Perform self-diagnosis of TCM.

2.

Check if DTC is detected. Refer to 

EC-514, "DTC Index"

.

3.

Repair or replace applicable item.

>> GO TO 9.

8.

REPLACE ICC SENSOR INTEGRATED UNIT

1.

Replace ICC sensor integrated unit.

2.

Adjust laser beam aiming. Refer to 

CCS-8, "LASER BEAM AIMING ADJUSTMENT : Special Repair

Requirement (Preparation)"

.

>> GO TO 9.

9.

CHECK ICC SYSTEM

1.

Erase DTC and perform ICC system action test. Then perform self-diagnosis of ICC sensor integrated
unit. (For the details on the ICC system action test, refer to 

CCS-13, "ACTION TEST : Special Repair

Requirement (Vehicle-To-Vehicle Distance Control Mode)"

).

2.

Check that no abnormal condition is present in the ICC system. 

>> INSPECTION END