Nissan Sentra Service Manual: Ecu diagnosis information
Bcm
Reference value
NOTE:
The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.
- Activate and display TPMS transmitter IDs
- Display tire pressure reported by the TPMS transmitter
- Read TPMS DTCs
- Register TPMS transmitter IDs
- Test remote keyless entry keyfob relative signal strength
VALUES ON THE DIAGNOSIS TOOL
Terminal layout
Physical values
Fail-safe
Fail-safe control by dtc
Bcm performs fail-safe control when any dtc are detected.
Fail-safe control of combination switch reading function caused by low power supply voltage
If voltage of battery power supply lower, BCM maintains combination switch reading to the status when input voltage is less than approximately 9 V.
Note:
When voltage of battery power supply is approximately 9 v or more, combination switch reading function returns to normal operation.
Dtc inspection priority chart
If some dtcs are displayed at the same time, perform inspections one by one based on the following priority chart.
Dtc index
Note:
Details of time display
- Crnt: displays when there is a malfunction now or after returning to the normal condition until turning ignition switch off ƒ¸ on again.
- 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1 → 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch OFF → ON after returning to the normal condition if the malfunction is detected again.
Diagnosis system (bcm)
Common item
Common item : consult function (bcm - common item)
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with BCM.
Direct Diagnostic Mode
Descriptio ...
Wiring diagram
BCM
Wiring diagram
...
Other materials:
Operating tips
When the engine coolant temperature and
outside air temperature are low, the air flow
from the foot outlets may not operate for a
maximum of 150 seconds. However, this is
not a malfunction. After the coolant temperature
warms up, air flow from the foot outlets
will operate normally.
...
Basic inspection
Diagnosis and repair workflow
Work Flow
Overall sequence
Detailed flow
1.Get information for symptom
Get detailed information from the customer about the symptom (the condition
and the environment when the
incident/malfunction occurred).
>> GO TO 2.
2.Confirm the symptom
Try t ...
Main line between dlc and av circuit
Diagnosis procedure
1.Check harness continuity (open circuit)
Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
Disconnect the following harness connectors.
ECM
AV control unit
Check the continuity between the data link connector and the av ...
