Nissan Sunny Won’t Start

15 Jun 2014 | Author: | Comments Off on Nissan Sunny Won’t Start

Questions and Answers

Nissan Won’t Start

Q. Hi, I’m a 1992 Nissan Sunny GTI 20. night I had a problem with my pump, probably, because my car was to start. I replace the gas filter a new but the problem was the same.

Then tow my car in my garage and I disassemble the fuel from the tank, trying to see happens.

I powered the pump from the battery and was okay. No sound, no disability to run, was looked okay. I check the voltage on the cables and was 12V when I the key, after three was reduced to 9.3V and remaining when the engine was running.

Eventually I put everything back, I and the engine starts and running I thought that the problem and I went to sleep. Next the car didn’t start.

You now something that. I think that the is electrical, maybe a relay or a cable.

I’m posted in a were the local Nissan has no idea about my car because imported here. So I need to do by myself. Fortunately I’m with electrical issues of my job and I think that if I found a electrical diagram for my engine solve the problem.

I’m sure that my fuel is working properly but I’m about the voltage measurements. you help me please.

My car details are:

1992 Sunny GTI 20

SR20DE engine


Thanks in advance,

A. The voltage drop at the fuel from 12 volts to 9.3 volts is Nissan varies the speed of the pump with voltage When demand is low, the PCM fuel pump down.

demand goes up the PCM speeds the pump up. This is to reduce and makes it slightly more efficient.

The first thing to do is sure it is a fuel problem. some carburetor cleaner the intake while someone the engine. If it starts and runs, confirmed the no-fuel condition.

If it doesn’t run, then looking at an ignition problem.

next thing to do is check the PCM for If it doesn’t start there’s an chance there is a DTC in the PCM that get us going in the right direction.


#149; The Control Unit (ECU) several engine sensors and If a problem occurs the information is in the ECU’s memory for retrieval.

The codes are displayed by the red diode on the The codes are interpreted by the number of and duration the diode flashes.

#149; The red diode ( #149; flash for 0.6 of a second with 0.6 of a delay between flashes X of times, this will units of ten.

#149; there will be a delay 0.9 of a and the red diode will flash for 0.3 of a with 0.3 of a second delay flashes X number of times, will represent units of

#149; There will be a of 2.1 seconds between codes.

For example, if the red diode flashes and then flashes twice this should be interpreted as 12. The codes are displayed in numerical starting with the lowest and with the highest.

Selecting Modes


Access the ECU from the panel under the carpet on the side floor board and it for observing the diode.

Turn the switch on (do not start the engine).

that the CHECK ENGINE in the instrument panel illuminates. If check the bulb and replace if

Turn the diagnostic mode on the ECU fully clockwise for at least two then turn the selector counterclockwise. The ECCS system is now in 2.

Observe the diode and note the displayed. Note: Code 55 all systems are okay.


Turn the ignition key on.

the diagnostic mode selector on the ECU clockwise and wait more two seconds then turn the fully counterclockwise. The ECCS is now in mode 2.

Turn the diagnostic selector on the ECU fully clockwise and more than two seconds turn the selector fully The ECCS system is now in mode 1. ECU is now erased.

Once you have the you can see what they are here: Trouble Codes

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