Infiniti QX56 (Z62). Manual - part 289

DAS

U1517 ACCELERATOR PEDAL ACTUATOR CAN 3

DAS-193

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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U1517 ACCELERATOR PEDAL ACTUATOR CAN 3

DTC Logic

INFOID:0000000006228167

DTC DETECTION LOGIC

NOTE:
If DTC “U1517” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

DAS-182,

"ADAS CONTROL UNIT : DTC 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 “U1517” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1517” detected as the current malfunction?

YES

>> Refer to 

DAS-193, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006228168

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “U1517” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

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

Refer to 

DAS-182, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ACCELERATOR PEDAL ACTUATOR SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ACCELE PEDAL ACT”. 

Is any DTC detected?

YES

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

DAS-108, "DTC Index"

.

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

U1517

(167)

APA CAN CIRC 3

ADAS control unit detects an error signal that is 
received from accelerator pedal actuator via 
CAN communication

Accelerator pedal actuator

DAS-194

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

U1520 4WD CAN 3

U1520 4WD CAN 3

DTC Logic

INFOID:0000000006228169

DTC DETECTION LOGIC

NOTE:
If DTC “U1520” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

DAS-182,

"ADAS CONTROL UNIT : DTC 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 “U1520” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1520” detected as the current malfunction?

YES

>> Refer to 

DAS-194, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006228170

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “U1520” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

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

Refer to 

DAS-182, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK TRANSFER CONTROL UNIT SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ALL MODE AWD/4WD”. 

Is any DTC detected?

YES

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

DLN-29, "DTC Index"

.

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

U1520

(176)

4WD CAN CIRC 3

ADAS control unit detects an error signal that is 
received from transfer control unit via CAN 
communication

Transfer control unit

DAS

POWER SUPPLY AND GROUND CIRCUIT

DAS-195

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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POWER SUPPLY AND GROUND CIRCUIT

ADAS CONTROL UNIT

ADAS CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006223648

1.

CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT 

Check voltage between ADAS control unit harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the ADAS control unit power supply circuit. 

2.

CHECK ADAS CONTROL UNIT GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the ADAS control unit connector. 

3.

Check for continuity between ADAS control unit harness connector and ground. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the ADAS control unit ground circuit. 

ACCELERATOR PEDAL ACTUATOR

ACCELERATOR PEDAL ACTUATOR : Diagnosis Procedure

INFOID:0000000006223649

1.

CHECK FUSES

Check if any of the following fuses are blown:

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

2.

CHECK ACCELERATOR PEDAL ACTUATOR POWER SUPPLY CIRCUIT 

Check voltage between accelerator pedal actuator harness connector and ground. 

Terminal

Condition

Voltage

(Approx.)

(+)

(–)

ADAS control unit

Ground

Ignition 

switch

Connector

Terminal

B61

16

OFF

0 V

ON

Battery volt-

age

ADAS control unit

Ground

Continuity

Connector

Terminal

B61

6

Existed

Signal name

Fuse No.

Battery power supply

33

DAS-196

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the accelerator pedal actuator power supply circuit. 

3.

CHECK ACCELERATOR PEDAL ACTUATOR GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the accelerator pedal actuator connector. 

3.

Check for continuity between accelerator pedal actuator harness connector and ground. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the accelerator pedal actuator ground circuit.

Terminal

Condition

Voltage

(Approx.)

(+)

(–)

Accelerator pedal actuator

Ground

Ignition 

switch

Connector

Terminal

E66

1

OFF

Battery volt-

age

3

ON

Accelerator pedal actuator

Ground

Continuity

Connector

Terminal

E66

2

Existed