Nissan Altima 2007-2012 Service Manual: Can communication system
System Description
• CAN communication is a multiplex communication system. This enables the system to transmit and receive large quantities of data at high speed by connecting control units with two communication lines (CAN-H and CAN-L).
• Control units on the CAN network transmit signals using the CAN communication control circuit. They receive only necessary signals from other control units to operate various functions.
• CAN communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.
System Diagram
Each control unit passes an electric current to the termination circuits when transmitting CAN communication signal. The termination circuits produce an electrical potential difference between CAN-H and CAN-L. CAN communication system transmits and receives CAN communication signals by the potential difference.
CAN Communication Control Circuit
*: These are the only control units wired with both ends of CAN communication system.
Diag on can
Description
“Diag on CAN” is a diagnosis using CAN communication instead of previous DDL1
and DDL2 communication
lines, between control units and diagnosis unit.
System Diagram
...
Other materials:
Battery replacement
CAUTION
Be careful not to allow children to swallow
the battery or removed parts.
NISSAN INTELLIGENT KEY®
Replace the battery in the Intelligent Key as follows:
1. Remove the mechanical key from the Intelligent
Key.
2. Insert a small screwdriver A into the slit B
of the corner and twist it ...
Intake sensor
Description
Intake Sensor
The intake sensor is located on the heater and cooling unit. It converts
temperature of air after it passes
through the evaporator into a resistance value which is then input to the front
air control.
Diagnosis Procedure
SYMPTOM: Intake sensor circuit is open or ...
Precaution
Supplemental Restraint System (SRS) "AIR BAG"
and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
driver and front ...