Precautions For Testing/Diagnosing ECCS System (NTB95-059)
WARNING: This page is about the Sentra E, 2D Sedan, Automatic, which is a different variant/trim than selected.
Publication date: 1995-06-07Reference number: NTB95-059
PRECAUTIONS FOR TESTING/DIAGNOSING ECCS SYSTEM
TECHNICAL SERVICE BULLETIN
Reference Number(s): NTB95-059, Date of Issue:
June 7, 1995
PRECAUTIONS FOR TESTING/DIAGNOSING THE ECCS SYSTEM TO AVOID DAMAGING THE ECM
Model(s): All Nissan Models
Classification: EC95-011
Section: Emission Control
Bulletin No.: NTB95-059
Date: June 7, 1995
SERVICE INFORMATION
Observing the following precautions when testing/diagnosing Electronic Concentrated Control System (ECCS) may help prevent damaging the Electronic Control Module (ECM).
SERVICE PROCEDURE
- Most relays in the ECCS system (Fuel pump, A/C, etc.) and actuators (Injectors, etc.) are powered by the battery. The ECM controls the relay or actuator by supplying the ground.
DO NOT apply battery voltage directly to any of the ECM pins (or wires connected to them) which supply the ground to any relays or actuators (see circled areas in Fig 1 ). Doing so will permanently damage the ECM.
- Do not connect or disconnect any ECCS connectors when the ignition key is in the "ON" position.
- Do not remove the cover of the ECM.