Nissan Pathfinder. Manual - part 705
U1000 CAN COMM CIRCUIT
HAC-81
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
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HAC
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DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009176815
CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle
multiplex communication system with high data communication speed and excellent error detection ability.
Many electronic control units are equipped onto vehicles, and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only. Refer to
LAN-36, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"
.
DTC Logic
INFOID:0000000009176816
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
3. Check if any DTC No. is displayed in the self-diagnosis results.
Is DTC detected?
YES
>> Refer to
NO
>> Refer to
GI-49, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000009176817
1.
CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to
LAN-20, "Trouble Diagnosis Flow Chart"
.
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
U1000
CAN COMM CIRCUIT
When A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.
CAN communication system