Nissan Altima 2007-2012 Service Manual: U1000 can comm circuit
DescriptionCAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex 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-25, "CAN Communication Signal Chart".
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result”.
Is “CAN COMM CIRCUIT” displayed? YES >> Refer to LAN-8, "CAN Communication Control Circuit".
NO >> Refer to GI-42, "Intermittent Incident".
U1010 control unit (can)
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1. REPLACE BCM
When DTC U1010 is detected, replace BCM.
>> Replace BCM. Refer to BCS-96, "Removal and Installation". ...
Other materials:
B2557 vehicle speed
Description
BCM receives the 2 vehicle speed signals via CAN communication. 1 signal is
transmitted by the “unified
meter” Another signal is transmitted by “ABS actuator and electric unit (control
unit)”. BCM compares both signals
to detect the vehicle speed.
DTC Logic
DTC DETECTIO ...
P0500 VSS
Description
The vehicle speed signal is sent to the combination meter from the “ABS
actuator and electric unit (control
unit)” by CAN communication line. The combination meter then sends a signal to
the ECM by CAN communication
line.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC P0 ...
B260d steering lock unit
Description
The electronic steering column lock performs the check by itself according to
the steering lock status (before
lock, after lock and unlock).
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Turn i ...