Nissan Pathfinder. Manual - part 712
B2796, B2797, B2798 COMMUNICATION ERROR
HAC-109
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
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HAC
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B2796, B2797, B2798 COMMUNICATION ERROR
DTC Logic
INFOID:0000000009176847
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
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
HAC-109, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009176848
Regarding Wiring Diagram information, refer to
1.
CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP.
→ REAR AIR CONTROL) FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect rear air control and A/C auto amp. connector.
3. Check continuity between rear air control harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP.
→ REAR AIR CONTROL) FOR SHORT
Check continuity between rear air control harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B2796
Communication error
When A/C auto amp. is not transmitting
or receiving communication signal for 2
or more seconds.
• Rear control unit
• A/C auto amp.
• Harness and connector
(Communication line is open or short-
ed)
B2797
When display unit is not transmitting or
receiving communication signal for 2 or
more seconds.
B2798
When rear control unit is not transmit-
ting or receiving communication signal
for 2 or more seconds.
Rear air control
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M258
9
M50
5
Yes
Rear air control
—
Continuity
Connector
Terminal
M258
9
Ground
No