Infiniti G35 (V35) Sedan. Manual — part 1170
U1000 CAN COMM CIRCUIT
SEC-35
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
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COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000000961332
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 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.
CAN Communication Signal Chart. Refer to
LAN-28, "CAN Communication Signal Chart"
DTC Logic
INFOID:0000000000961333
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000000961334
1.
PERFORM SELF DIAGNOSTIC
1.
Turn ignition switch ON and wait for 2 second or more.
2.
Check “Self Diagnostic Result”.
Is “CAN COMM CIRCUIT” displayed?
YES
>> Refer to
LAN-18, "Trouble Diagnosis Flow Chart"
NO
>> Refer to
GI-39, "Intermittent Incident"
.
DTC
CONSULT-III display
description
DTC Detection Condition
Possible cause
U1000
CAN COMM CIRCUIT
When BCM cannot communicate CAN com-
munication signal continuously for 2 sec-
onds or more.
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)
SEC-36
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
DTC Logic
INFOID:0000000000961335
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000000961336
1.
REPLACE BCM
When DTC [U1010] is detected, replace BCM.
>> Replace BCM.
Special Repair Requirement
INFOID:0000000000961337
1.
REQUIRED WORK WHEN REPLACING BCM
Initialize IVIS by CONSULT-III. For the details of initialization refer to CONSULT-III operation manual NATS-
IVIS/NVIS.
>> Work end.
DTC
CONSULT-III display de-
scription
DTC Detection Condition
Possible cause
U1010
CONTROL UNIT (CAN)
BCM detected internal CAN communication circuit malfunction.
BCM
B2190, P1610 NATS ANTENNA AMP
SEC-37
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
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B2190, P1610 NATS ANTENNA AMP
Description
INFOID:0000000000961338
Performs ID verification through BCM and Intelligent Key when push-button ignition switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of Intelligent Key is used.
DTC Logic
INFOID:0000000000961339
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Insert Intelligent Key into the key slot.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Press the push-button ignition switch.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END.
Diagnosis Procedure
INFOID:0000000000961340
1.
INSPECTION START
Check the case in which DTC is detected.
• Case1: It is detected when Intelligent Key is inserted into key slot.
• Case2: It is detected after Intelligent Key is inserted into key slot and push-button ignition switch is pressed.
In which case is DTC detected?
Case1. >> GO TO 2.
Case2. >> GO TO 4.
2.
CHECK KEY SLOT INPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect key slot harness connector.
3.
Check voltage between key slot harness connector and ground.
Is the inspection result normal?
YES
>> Replace key slot.
NO
>> GO TO 3.
3.
CHECK KEY SLOT CIRCUIT
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2190
NATS ANTENNA
AMP
Inactive communication between key slot and
BCM.
• Harness or connectors
(The key slot circuit is open or
shorted)
• Key slot
• BCM
P1610
Key slot
Ground
Voltage [V]
(approx.)
Connector
Terminal
M22
2
Ground
Battery voltage
SEC-38
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2190, P1610 NATS ANTENNA AMP
1.
Disconnect BCM harness connector M122.
2.
Check continuity between key slot harness connector and BCM harness connector.
3.
Check continuity between key slot harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
4.
CHECK PUSH-IGNITION SWITCH OPERATION
Press push-button ignition switch and check if it turns ON.
Does ignition switch turn to ON?
YES
>> GO TO 5.
NO
>> GO TO 7.
5.
CHECK KEY SLOT COMMUNICATION SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect key slot harness connector.
3.
Check voltage between key slot harness connector and ground.
Is the inspection result normal?
YES
>> Replace key slot.
NO
>> GO TO 6.
6.
CHECK KEY SLOT COMMUNICATION SIGNAL CIRCUIT
1.
Disconnect BCM harness connector M122.
2.
Check continuity between key slot harness connector and BCM harness connector.
3.
Check continuity between key slot harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
7.
CHECK KEY SLOT GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect key slot harness connector.
3.
Check continuity between key slot harness connector and ground.
Key slot
BCM
Continuity
Connector
Terminal
Connector
Terminal
M22
2
M122
80
Existed
Key slot
Ground
Continuity
Connector
Terminal
M22
2
Ground
Not existed
Key slot
Ground
Continuity
Connector
Terminal
M22
3
Ground
Existed
Key slot
BCM
Continuity
Connector
Terminal
Connector
Terminal
M22
3
M122
81
Existed
Key slot
Ground
Continuity
Connector
Terminal
M22
3
Ground
Not existed
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