Infiniti G37 Coupe. Manual — part 313

CCS

C1A26 ECD MODE MALFUNCTION

CCS-65

< COMPONENT DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

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C1A26 ECD MODE MALFUNCTION

Description

INFOID:0000000001606919

ECD (ELECTRONICALLY CONTROLLED DECELERATION)
• Receives deceleration degree commandment value signal from ICC sensor integrated unit, and controls

brake fluid pressure with the motor [built in ABS actuator and electric unit (control unit)].

• ECD control-related signals are transmitted by ABS actuator and electric unit (control unit) to ICC sensor

integrated unit with CAN communication.

NOTE:
If DTC C1A26 is detected along with DTC U1000, U0415 or U0121 first diagnose the DTC U1000, U0415 or
U0121.
• DTC U1000: Refer to

CCS-79, "Diagnosis Procedure"

.

• DTC U0415: Refer to

CCS-77, "Diagnosis Procedure"

.

• DTC U0121: Refer to

CCS-71, "Diagnosis Procedure"

.

DTC Logic

INFOID:0000000001606920

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001606921

1.

PERFORM SELF-DIAGNOSIS OF ICC SENSOR INTEGRATED UNIT

1.

Perform self-diagnosis of ICC sensor integrated unit.

2.

Check if DTC “CAN COMM CIRCUIT [U1000]” (DTC 100) or “VDC CAN CIR 1 [U0415]” (DTC 126), “VDC
CAN CIR 2 [U0121]” (DTC 127) other than “ECD MODE MALF [C1A26]” (DTC 26) 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-92, "DTC

Index"

.

>> GO TO 6.

3.

PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

1.

Perform self-diagnosis of ABS actuator and electric unit (control unit).

2.

Check if DTC is detected. Refer to

BRC-88, "DTC No. 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 SESNOR INTEGRATED UNIT

1.

Replace ICC sensor integrated unit.

DTC No.

(On board

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A26

(26)

ECD MODE MALF

If an abnormal condition occurs with ECD system.

ABS actuator and electric unit (control
unit)

CCS-66

< COMPONENT DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

C1A26 ECD MODE MALFUNCTION

2.

Adjust laser beam aiming. Refer to

CCS-7, "LASER BEAM AIMING ADJUSTMENT : Special Repair

Requirement (Preparation)"

.

>> GO TO 6.

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-11, "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

C1A27 ECD POWER SUPPLY CIRCUIT

CCS-67

< COMPONENT DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

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C1A27 ECD POWER SUPPLY CIRCUIT

Description

INFOID:0000000001606922

ECD (ELECTRONICALLY CONTROLLED DECELERATION)
• Receives deceleration degree commandment value signal from ICC sensor integrated unit, and controls

brake fluid pressure with the motor [built in ABS actuator and electric unit (control unit)].

• ECD control-related signals are transmitted by ABS actuator and electric unit (control unit) to ICC sensor

integrated unit with CAN communication.

NOTE:
If DTC C1A27 is detected along with DTC U1000, U0415 or U0121 first diagnose the DTC U1000, U0415 or
U0121.
• DTC U1000: Refer to

CCS-79, "Diagnosis Procedure"

.

• DTC U0415: Refer to

CCS-77, "Diagnosis Procedure"

.

• DTC U0121: Refer to

CCS-71, "Diagnosis Procedure"

.

DTC Logic

INFOID:0000000001606923

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001606924

1.

PERFORM SELF-DIAGNOSIS OF ICC SENSOR INTEGRATED UNIT

1.

Perform self-diagnosis of ICC sensor integrated unit.

2.

Check if DTC “CAN COMM CIRCUIT [U1000]” (DTC 100) or “VDC CAN CIR 1 [U0415]” (DTC 126), “VDC
CAN CIR 2 [U0121]” (DTC 127) other than “ECD PWR SUPLY CIR [C1A27]” (DTC 27) 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-92, "DTC

Index"

.

>> GO TO 6.

3.

CHECK POWER SUPPLY CIRCUIT OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check power supply circuit of ABS actuator and electric unit (control unit). Refer to

BRC-37, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

REPAIR OR REPLACE ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY

Repair or replace ABS actuator and electric unit (control unit) power supply.

>> GO TO 6.

5.

PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

DTC No.

(On board

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A27

(27)

ECD PWR SUPLY CIR

ECD system power supply voltage is excessively
low.

• ABS actuator and electric unit (con-

trol unit) power supply circuit

• ABS actuator and electric unit (con-

trol unit)

CCS-68

< COMPONENT DIAGNOSIS >

[INTELLIGENT CRUISE CONTROL]

C1A27 ECD POWER SUPPLY CIRCUIT

1.

Perform self-diagnosis of ABS actuator and electric unit (control unit).

2.

Repair or replace applicable item. Refer to

BRC-88, "DTC No. Index"

.

>> GO TO 6.

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-11, "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