Infiniti QX56 (JA60). Manual - part 172

 

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Infiniti QX56 (JA60). Manual - part 172

 

 

CCS-24

< COMPONENT DIAGNOSIS >

DTC 20 CAN COMM CIRCUIT

DTC 20 CAN COMM CIRCUIT

DTC 20 CAN COMM CIRCUIT

INFOID:0000000005145987

1.

CHECK CAN COMMUNICATION

1. Perform self-diagnosis.

>> GO TO “CAN system”. Refer to 

LAN-4, "System Description"

 .

CCS

DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2

CCS-25

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2

DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2

INFOID:0000000005145988

Regarding Wiring Diagram information, refer to 

CCS-48, "Wiring Diagram"

.

1.

CHECK ICC UNIT CONNECTOR

1. Turn ignition switch OFF.

2. Disconnect ICC unit connectors and connect them securely again. Erase DTC, then perform self-diagno-

sis of ICC system again.

Does the DTC reset?

YES

>> GO TO 2

NO

>> • Poor connector connection.

• Check connector. Check connector housing for disconnected, loose, bent, and collapsed termi-

nals. If any malfunction is detected, repair as as necessary. Erase DTC and perform ICC system

running test. Refer to 

CCS-8, "ACTION TEST : ICC System Running Test"

.

2.

CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT

1. Turn ignition switch ON.

2. Check voltage between ICC unit harness connector B17 termi-

nals 33, 42 and ground.

Does battery voltage exist?

YES

>> GO TO 3

NO

>> • Repair ICC unit power supply harness.

• Erase DTC and perform ICC system running test.

Refer to 

CCS-8, "ACTION TEST : ICC System Run-

ning Test"

.

3.

CHECK GROUND CIRCUIT FOR ICC UNIT

1. Turn ignition switch OFF.

2. Disconnect ICC unit connectors.

3. Check continuity between ICC unit harness connector B13 ter-

minals 19, 20, and connector B17 terminal 46 and ground.

Does continuity exist?

YES

>> Replace ICC unit. Refer to 

CCS-71, "ICC Unit"

 . Erase

DTC and perform ICC system running test. Refer to

CCS-8, "ACTION TEST : ICC System Running Test"

 .

NO

>> • Repair ICC unit ground harness.

• Erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION TEST : ICC Sys-

tem Running Test"

 . 

Battery voltage should exist. 

SKIA1173E

Continuity should exist.

SKIA6650E

CCS-26

< COMPONENT DIAGNOSIS >

DTC 41 VHCL SPEED SE CIRC

DTC 41 VHCL SPEED SE CIRC

DTC 41 VHCL SPEED SE CIRC

INFOID:0000000005145989

1.

PERFORM ICC UNIT SELF-DIAGNOSIS

Perform self-diagnosis. 
Is “DTC 43 VDC/TCS/ABS CIRC” or “DTC 20 CAN COMM CIRCUIT” indicated in self-diagnosis item display?

YES

>> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to 

CCS-

8, "ACTION TEST : ICC System Running Test"

.

NO

>> GO TO 2

2.

CHECK A/T VEHICLE SPEED SENSOR

With data monitor, check “VHCL SPD AT”.
Does the data monitor item work normally?

YES

>> Replace ICC unit. Refer to 

CCS-71, "ICC Unit"

. Erase DTC and perform ICC system running test.

Refer to 

CCS-8, "ACTION TEST : ICC System Running Test"

.

NO

>> • Check TCM.

• Erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION TEST : ICC Sys-

tem Running Test"

 .

CCS

DTC 43 VDC/TCS/ABS CIRC

CCS-27

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

DTC 43 VDC/TCS/ABS CIRC

DTC 43 VDC/TCS/ABS CIRC

INFOID:0000000005145990

1.

DIAGNOSIS CHECK 1

Perform self-diagnosis.
Is “CAN COMM CIRCUIT” indicated?

YES

>> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to 

CCS-

8, "ACTION TEST : ICC System Running Test"

.

NO

>> GO TO 2

2.

DIAGNOSIS CHECK 2

Perform self-diagnosis of ABS actuator and electric unit (control unit). 
Is malfunction indicated?

YES

>> Repair the ABS system as necessary. Erase DTC and perform ICC system running test. Refer to

CCS-8, "ACTION TEST : ICC System Running Test"

 .

NO

>> Replace ICC unit. Refer to 

CCS-71, "ICC Unit"

. Erase DTC and perform ICC system running test.

Refer to 

CCS-8, "ACTION TEST : ICC System Running Test"

.

 

 

 

 

 

 

 

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