Nissan Maxima. Manual — part 891
PCS-44
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
U1000 CAN COMM CIRCUIT
DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000010049418
.
DTC Logic
INFOID:0000000010049419
DTC DETECTION LOGIC
NOTE:
U1000 can be set if a module harness was disconnected and reconnected, perhaps during a repair. Confirm
that there are actual CAN diagnostic symptoms and a present DTC by performing the Self Diagnostic Result
procedure.
Diagnosis Procedure
INFOID:0000000010049420
1.
PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “SELF- DIAG RESULTS”.
Is “CAN COMM CIRCUIT” displayed?
YES
>> Perform CAN Diagnosis as described in DIAGNOSIS section of CONSULT Operation Manual.
NO
>> Refer to
GI-41, "Intermittent Incident"
.
CONSULT Display
DTC Detection Condition
Possible cause
CAN COMM CIRCUIT
[U1000]
When any listed module cannot communicate with CAN
communication signal continuously for 2 seconds or
more with ignition switch ON
In CAN communication system, any item (or items)
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (VDC/TCS/ABS)
• Receiving (METER/M&A)
• Receiving (TCM)
• Receiving (MULTI AV)
• Receiving (IPDM E/R)
PCS
U1010 CONTROL UNIT (CAN)
PCS-45
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
U1010 CONTROL UNIT (CAN)
DTC Logic
INFOID:0000000010049421
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000010049422
1.
REPLACE BCM
When DTC U1010 is detected, replace BCM.
>> Replace BCM. Refer to
BCS-79, "Removal and Installation"
CONSULT display de-
scription
DTC Detection Condition
Possible cause
CAN COMM CIRCUIT
[U1010]
BCM detected internal CAN communication circuit malfunction.
BCM
PCS-46
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2553 IGNITION RELAY
B2553 IGNITION RELAY
Description
INFOID:0000000010049423
BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned
ON.
• Ignition relay-1 (inside IPDM E/R)
• Ignition relay-2 (inside fuse block (J/B))
• Front blower motor relay
BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.
DTC Logic
INFOID:0000000010049424
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.
-
CVT selector lever is in the P or N position.
-
Release brake pedal.
2. Check “Self diagnostic result” with CONSULT.
Is DTC detected?
YES
>> Go to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010049425
Regarding Wiring Diagram information, refer to
1.
CHECK IGNITION RELAY-2 FEEDBACK INPUT SIGNAL
Check voltage between BCM harness connector and ground under
the following conditions.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-79, "Removal and Installation"
NO
>> GO TO 2
2.
CHECK IGNITION RELAY-2 FEEDBACK CIRCUIT
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2553
IGNITION RELAY
BCM detects a difference of signal for 2 seconds or
more between the following information.
• Ignition relay-2 (fuse block (J/B)) ON/OFF opera-
tion
• Ignition relay-2 (fuse block (J/B)) feedback.
• Harness or connectors
(ignition relay-2 feedback circuit is
open or short)
Terminals
Condition
Voltage (V)
(+)
(-)
BCM
Ground
Connector
Terminal
M18
31
Ignition
switch
OFF
0
ON
Battery voltage
ALMIA0086ZZ
PCS
B2553 IGNITION RELAY
PCS-47
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
1. Turn ignition switch OFF.
2. Disconnect BCM and fuse block (J/B).
3. Check continuity between BCM harness connector (A) and fuse
block (J/B) harness connector (B).
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace harness.
3.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
.
>> Inspection End.
BCM
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
M18 (A)
31
M3 (B)
2N
Yes
ALMIA0087ZZ
BCM
Ground
Continuity
Connector
Terminal
M18
31
No
ALMIA0088ZZ
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