Nissan Altima (L32) 2007-2012 Service Manual: B2193, P1612 chain of ecm-immu
Description
BCM performs the ID verification with ECM that allows the engine to start.
Start the engine if the ID is OK.
ECM prevents the engine from starting if the ID is not registered. BCM starts
the communication with ECM if
ignition switch is turned ON.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000. Refer to
SEC-36, "DTC Logic".
• If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis
for DTC U1010. Refer to
SEC-37, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions.
- CVT selector lever is in the P or N position.
- Do not depress brake pedal.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SEC-69, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
1.REPLACE BCM
1. Replace BCM. Refer to BCS-96, "Removal and Installation".
2. Perform initialization with CONSULT-III.
For initialization, refer to CONSULT-III Operation Manual”.
Does the engine start?
YES >> BCM is malfunctioning.
• Replace BCM. Refer to BCS-96, "Removal and Installation".
• Perform initialization again.
NO >> ECM is malfunctioning.
• Replace ECM.
• Perform ECM re-communicating function.
Description
BCM performs the ID verification with ECM that allows the engine to start.
Start the engine if the ID is OK.
ECM prevents the engine from starting if the ID is not registered. BCM s ...
Description
BCM detects the stop lamp status and confirms the stop lamp switch ON/OFF
status. BCM confirms the
engine start condition according to the stop lamp switch ON/OFF status.
DTC Logic
...
Other materials: Vehicle information display warnings
and indicators
The following messages may appear in
your vehicle information display.
Engine start operation for
Intelligent Key system (if
I-Key battery level is low)
This indicator appears when the battery of
the Intelligent Key is low and when the Intelligent
Key system and the vehicle are not
communicating no ...
Emergency call (SOS) button (if so equipped)
Emergency support
NissanConnect Services provide various
services to support dealing with emergencies
of the subscribed vehicle and the
driver.
For example, in case of an illness or serious
injury, you can seek support by pressing
the in-vehicle Emergency Call (SOS) button
and connecting to the Nis ...
Warning/Indicator lights (other)
For additional information on warnings
and indicators, see "Vehicle information
display-5 inch (13 cm) Type A" or
"Vehicle information display 7 inch (18 cm)
Type B".
Automatic brake hold
indicator light (white/green)
(if so equipped)
The automatic brake hold indicator light
(white) illuminates whe ...