Nissan Sentra Service Manual: Service data and specifications (SDS)
Idle speed
*: Under the following conditions
- A/C switch: OFF
- Electric load: OFF (Lights, heater fan & rear window defogger)
- Steering wheel: Kept in straight-ahead position
Ignition timing
*: Under the following conditions
- A/C switch: OFF
- Electric load: OFF (Lights, heater fan & rear window defogger)
- Steering wheel: Kept in straight-ahead position
Calculated Load Value
Mass air flow sensor
*: Engine is warmed up to normal operating temperature and running under no load.
Removal and installation
Ecm
Exploded View
ECM bracket
ECM
Engine mounting insulator bracket
Removal and Installation
CAUTION:
Perform ADDITIONAL SERVICE WHEN REPLACING ECM. Refer to EC-135, "Work
Pro ...
Fuel system
...
Other materials:
A-bag branch line circuit
Diagnosis procedure
Warning:
Always observe the following items for preventing accidental
activation.
Before servicing, turn ignition switch off, disconnect battery
negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)
Never use unspecified tester or other me ...
P0420 Three way catalyst function
DTC Logic
DTC DETECTION LOGIC
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage c ...
Diagnosis and repair workflow
Work flow
Overall sequence
Detailed flow
1. Obtain information about symptom
Interview the customer to obtain as much information as possible about the
conditions and environment under
which the malfunction occurred.
>> GO TO 2.
2. Confirm concern
Check the malfunction on the veh ...
