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
.
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
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.
CCS-8, "ACTION TEST : ICC System Run-
.
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
. 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-
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
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
. Erase DTC and perform ICC system running test.
CCS-8, "ACTION TEST : ICC System Running Test"
.
NO
>> • Check TCM.
• Erase DTC and perform ICC system running test. Refer to
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
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
. Erase DTC and perform ICC system running test.
CCS-8, "ACTION TEST : ICC System Running Test"
.
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