Nissan Sentra Service Manual: Ecu diagnosis information
Abs actuator and electric unit (control unit)
Reference Value
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the event the output circuit (harness) is open or short-circuited.
Note 1:
Confirm tire pressure is normal. Note 2
: On and off timing for warning lamps and indicator lamps.
-
Refer to BRC-22, "VDC/TCS/ABS : VDC Function".
-
Refer to BRC-24, "VDC/TCS/ABS : TCS Function".
-
Refer to BRC-26, "VDC/TCS/ABS : ABS Function".
-
Refer to BRC-27, "VDC/TCS/ABS : EBD Function".
Fail-safe
VDC AND TCS FUNCTIONS
VDC warning lamp in combination meter turns ON when a malfunction occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC and TCS functions. However, ABS and EBD functions operate normally.
ABS FUNCTION
ABS warning lamp and SLIP indicator lamp in combination meter turn ON when a malfunction occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC, TCS and ABS functions.
However, EBD functions operate normally.
EBD FUNCTION
ABS warning lamp, brake warning lamp and SLIP indicator lamp in combination meter turn ON when a malfunction occurs in system [ABS actuator and electric unit (control unit)]. The control is suspended for VDC, TCS, ABS and EBD functions.
DTC Inspection Priority Chart
When multiple DTCs are displayed simultaneously, check each one using the following priority list.
DTC Index
Diagnosis system [abs actuator and electric unit (control
unit)]
CONSULT Function (ABS)
FUNCTION
CONSULT can display each diagnostic item using the following
direct diagnostic modes.
Direct Diagnostic Mode
Description
ECU identification
T ...
Wiring diagram
Brake control system
Wiring Diagram
...
Other materials:
Dtc/circuit diagnosis
U1000 can comm circuit
Description
Refer to LAN-7, "CAN COMMUNICATION SYSTEM : System Description".
Dtc logic
Dtc detection logic
Consult display
Dtc detection condition
Possible cause
Can comm circuit
[u1000]
When ipdm e/r cannot communicate with can comm ...
Ipdm-e branch line circuit
Diagnosis procedure
1.Check connector
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the IPDM E/R for damage, bend and
loose connection (unit side
and connector side).
Is the inspection result normal?
Yes ...
P014C, P014D, P015A, P015B A/F Sensor 1
DTC Logic
DTC DETECTION LOGIC
To judge the malfunction of A/F sensor 1, this diagnosis measures response
time of the A/F signal computed
by ECM from the A/F sensor 1 signal. The time is compensated by engine operating
(speed and load), fuel
feedback control constant, and the A/F sensor 1 tem ...
