Pajero ECU Fault Code Check
In this article we are taking a look at how to extract ecu fault codes for the Mitsubishi Pajero V6. This information covers the NF, NG, NH and NJ models.
To extract the codes on the Pajero you will need either a analogue volt meter or LED test light. The volt meter or test light needs to be connected between the A and C terminals of the Diagnosis Connector and the codes will be displayed as a series of needle movements on a voltmeter or flashes on a test light. The location and terminal arrangement of this connector varies between the different models, please refer to the pictures below.
We don’t have an image for the NF model but from the information we have here it is taped to the wiring loom behind the glove box.
Once you have located the Diagnosis Connector in your particular vehicle connect an analogue voltmeter or LED test light between terminals A and C (see above pics for terminal location). If your voltmeter or test light doesn’t have a probe on both ends a split pin makes a good extension that you insert into the terminal and clip onto.
With the voltmeter/test light in place you can now switch the ignition to ON and start to read the code/s. Each code will display as a series of pulses separated by a pause.
The first series will be long pulses and they represent tens. The second series will be short pulses and they represent the units. For example, three long pulses followed by a pause, followed by one short pulse indicates code 31.
If there has been more than one code stored in the ecu memory each code will be displayed in sequence. Also, if the voltmeter or test light displays a constant voltage without pulsing the ecu should be renewed.
If there are no fault codes recorded in the ecu memory short pulses will be displayed continuously.
What the Fault Codes mean.
This list will give you a basic idea of where any faults lie, however for the majority of the components listed there is further tests that should be done before replacing it.
- Code 11 – Oxygen Sensor (NJ and NH models)
- Code 12 – Air Flow Sensor
- Code 13 – Intake Air Temperature Sensor
- Code 14 – Throttle Position Sensor
- Code 21 – Coolant Temperature Sensor
- Code 22 – Crank Angle Sensor
- Code 23 – TDC (top dead centre) Sensor
- Code 24 – Vehicle Speed Sensor
- Code 25 – Atmospheric Pressure Sensor
- Code 36 – Ignition Timing Signal (NH and NJ models)
- Code 41 - Injectors
- Code 42 – Fuel Pump (NF and NG models)