2010 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2010  Factory Service Manual LAN
DIAGNOSIS AND REPAIR WORKFLOWLAN-27
< BASIC INSPECTION > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
5. Perform the inspection for the detected error circui
t. For the inspection procedure, re

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INFINITI QX56 2010  Factory Service Manual LAN-28
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
• Refer to “MALFUNCTION AREA CHART”.
Past Error — Open Circuit —
Review CAN communication signal chart based on inf

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INFINITI QX56 2010  Factory Service Manual LAN
DIAGNOSIS AND REPAIR WORKFLOWLAN-29
< BASIC INSPECTION > [CAN FUNDAMENTAL]
C
D
E
F
G H
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K L
B A
O P
N
1. SELF-DIAG RESULTS: Inspect the control units 
indicating “U1000” or “U1001” on S

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INFINITI QX56 2010  Factory Service Manual LAN-30
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
c. Reception item of “TCM”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means TCM could not
receive t

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INFINITI QX56 2010  Factory Service Manual LAN
DIAGNOSIS AND REPAIR WORKFLOWLAN-31
< BASIC INSPECTION > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
b. Reception item of “ABS”: Assume that the unit 
could not receive the signal from ECM

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INFINITI QX56 2010  Factory Service Manual LAN-32
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
b. The tachometer moved normally: This means that “Engine speed signal” could communicate normally
between ECM and M&A (4

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INFINITI QX56 2010  Factory Service Manual LAN
DIAGNOSIS AND REPAIR WORKFLOWLAN-33
< BASIC INSPECTION > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
b. The tachometer moved normally: Put check marks between ECM and M&A. The circuit between

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INFINITI QX56 2010  Factory Service Manual LAN-34
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
7. Perform the inspection procedure for the possi
ble cause. Refer to “MALFUNCTION AREA CHART”.
Past Error — Short Circ