Infiniti EX35. Manual — part 1284
SEC-32
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
BCM
BCM : Description
INFOID:0000000003586492
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-27, "CAN Communication Signal Chart"
BCM : DTC Logic
INFOID:0000000003586493
DTC DETECTION LOGIC
BCM : Diagnosis Procedure
INFOID:0000000003586494
1.
PERFORM SELF DIAGNOSTIC
1.
Turn ignition switch ON and wait for 2 seconds or more.
2.
Check “Self Diagnostic Result”.
Is “U1000: CAN COMM CIRCUIT” displayed?
YES
>> Refer to
LAN-18, "Trouble Diagnosis Flow Chart"
NO
>> Refer to
GI-38, "Intermittent Incident"
.
IPDM E/R
IPDM E/R : Description
INFOID:0000000003586756
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-27, "CAN Communication Signal Chart"
IPDM E/R : DTC Logic
INFOID:0000000003586757
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
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 seconds
or more.
CAN communication system
DTC
CONSULT-III display
description
DTC Detection Condition
Possible cause
U1000
CAN COMM CIRCUIT
When IPDM E/R cannot communicate CAN
communication signal continuously for 2
seconds or more
CAN communication system
U1000 CAN COMM CIRCUIT
SEC-33
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
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IPDM E/R : Diagnosis Procedure
INFOID:0000000003586758
1.
PERFORM SELF DIAGNOSTIC
1.
Turn ignition switch ON and wait for 2 seconds or more.
2.
Check “Self Diagnostic Result” of IPDM E/R.
Is “CAN COMM CIRCUIT” displayed?
YES
>> Refer to
LAN-18, "Trouble Diagnosis Flow Chart"
NO
>> Refer to
GI-38, "Intermittent Incident"
.
SEC-34
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
BCM
BCM : DTC Logic
INFOID:0000000003586495
DTC DETECTION LOGIC
BCM : Diagnosis Procedure
INFOID:0000000003586496
1.
REPLACE BCM
When DTC “U1010: CONTROL UNIT (CAN)” is detected, replace BCM.
>> Replace BCM. Refer to
BCM : Special Repair Requirement
INFOID:0000000003586497
1.
REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. 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
P1610 LOCK MODE
SEC-35
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
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P1610 LOCK MODE
Description
INFOID:0000000003586498
When the starting operation is carried more than five times consecutively under the following conditions, NATS
will shift to the mode which prevents the engine from being started.
• Unregistered Intelligent Key is used.
• BCM or ECM is malfunctioning.
DTC Logic
INFOID:0000000003586499
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003586500
1.
CHECK ENGINE START FUNCTION
1.
Perform the check for DTC except DTC P1610.
2.
Use CONSULT-III to erase DTC after fixing.
3.
Turn ignition switch OFF.
4.
Turn ignition switch ON when registered Intelligent Key insert into key slot and wait for 5 seconds.
5.
Return the ignition switch OFF and wait 5 seconds.
6.
Repeat steps 4 and 5 twice (total of 3 cycles).
7.
Check that engine can start when registered Intelligent Key insert into key slot.
>> INSPECTION END
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P1610
LOCK MODE
When the starting operation is carried out
five or more times consecutively under the
following conditions.
• Unregistered Intelligent Key
• BCM or ECM is malfunctioning.
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