//bottom ads

Pickup 1997

Electronic Control Module

Print

Location



Specific to:

Nissan Pickup 1996-1997



Click image to see an enlarged view

Fig. ECM location

Operation



Specific to:

Nissan Pickup 1996-1997

The Electronic Control Unit (ECU) in all vehicles will store and report fault codes. If a malfunction is detected only one time, the CHECK ENGINE light may not stay lit. However the fault code will remain in memory for the next 50 ignition cycles when the starter is operated. If the fault occurs again, the counter will reset to 0 and the code will be in memory for 50 ignition cycles from that point. The fault code can be erased manually and is erased any time the vehicle battery is disconnected. If the ignition switch is turned OFF when in diagnostic mode, the ECU automatically defaults to Mode 1.

There are two diagnostic programs used by Nissan, a four mode and a five mode. All vehicles covered here use the five mode program. Modes 1 and 2 monitor mixture ratio feedback control. Mode 3 reports trouble codes and is the mode used for clearing the stored codes. Mode 4 monitors various switches in the engine management system. Mode 5 displays faults occurring at the moment of operation and can be used while driving the vehicle.

As useful as these diagnostic tests are, the first step in repair or service to engine management systems is still to gain and evaluate as much information as possible regarding intermittent problems and to repair the obvious. Before checking fault codes, it is absolutely essential to check for any obvious mechanical faults or failures. Remember, a trouble code only indicates which sensor or circuit is effected by the problem. Simple mechanical faults such as a vacuum leak or poor electrical connection can cause a fault code.

The Electronic Control Unit (ECU) for all models is located under the front passenger seat. If equipped, the ECCS check connector is located in the instrument panel to the rear of the hood opener assembly. Always refer to the diagnostic charts for additional service information.

Removal & Installation



Specific to:

Nissan Pickup 1996-1997

At this time the manufacturer does not provide removal and installation procedures for this component, refer to the illustration as required. Before servicing the vehicle, refer to the Precautions Section.


NOTE
If working near and/or around the SRS system and components, be sure to disable the SRS system. After disabling the system wait three minutes or more before servicing the vehicle. Disconnect the air bag module connector. Disconnect the negative battery cable. Once repair work is completed, use the CONSULT-III diagnostic tool, or equivalent, perform the SRS self diagnostic test and any reconnect/relearn procedures, as required.



Click image to see an enlarged view

Fig. Air bag module connector location



Click image to see an enlarged view

Fig. ECM and related components

 
label.common.footer.alt.autozoneLogo