zd30 engine code

[dirtygu]

ok so i did a fault code scan today and found a 0102 code now does that mean its a maf or a ecm as i have no accelerator control car just idles didnt think a maf would make that happen

ps. i also did a maf test and i have no pwer at the red wire but have power at the wite just no at the right specs

[Yendor]

What voltage did you have in the white wire? was that pin 2 or pin 4 at the MAF sensor?

Did you check the voltages for the MAF sensor at the ECU? Did you check for a short to ground or open circuit in the wire harness between the MAF and ECU?

I recommend you clear the code and reset the ECU then go for a drive. If the code resets then follow the workshop manual flow chart.

[dirtygu]

What voltage did you have in the white wire? was that pin 2 or pin 4 at the MAF sensor?

Did you check the voltages for the MAF sensor at the ECU? Did you check for a short to ground or open circuit in the wire harness between the MAF and ECU?

I recommend you clear the code and reset the ECU then go for a drive. If the code resets then follow the workshop manual flow chart.


i did the check at the maf plug near air cleaner
voltage on pn 2 was about 5 on pin 4 was only 9 when should b battery voltage of 12.9v
ho do i check for a shortt ground or open circuit in the harness ????
and how do i reset the ecu ??? i have cleared all codes tho

[Yendor]

Pin 4 should be around 12 volts with the ignition on.

There is an ECU relay above the fuse box inside the vehicle that could be causing this.

Try swapping it with a relay of the same colour, from memory the A/C one under the bonnet.

Then recheck the voltage at pin 4.

If voltage is still low check all the earth wires on the engine. Undo them, clean them and refit.

[dirtygu]

ok so i just went out and did a quick check and my relay seams to be in the same spot as the tb45 but i swaped with the a/c one and gave the car a start after clearing the code and i have power at both white ones but i dont have any reading at the red wire does that mean it caput

[Yendor]

What voltage do you have at pins 2 & 4 now?

[dirtygu]

pin 2 4.9v - 5.0v
pin 4 12.8v - 13.2v
dont think the relay fixed that think i just was earthing the meater wrong lol

[Yendor]

That's good. These are the earths you need to check, remove, clean and refit.

Then with the MAF disconnected make sure continuity exist between pin 3 and the engine ground.

[dirtygu]

That's good. These are the earths you need to check, remove, clean and refit.

Then with the MAF disconnected make sure continuity exist between pin 3 and the engine ground.


cheers mate ill have a look tomorrow and get back to ya
ya dont think the maf is stuffed thats what ppl have been telling me ???

[Yendor]

If you want to take a guess........yes it's a very good chance your MAF is stuffed.

If the red wire has no voltage.

It could also be a wiring fault.

[Stokezi]

Fault codes
0102 Air Flow Sensor
0103 Coolant temp sender
0104 Vehicle speed sensor
0203 Throttle pedal switch
0208 Cooling Fan control
0301 Engine ECU
0402 Fuel temperature sensor
0403 Throttle pedal position sensor
0406* Intake air volume VNC system
0407 Crankshaft position sensor
0502* Battery voltage
0504 Auto Trans communication line
0701 Injection Pump –cam ring position sensor
0702 Injection Pump –TDC pulse sensor
0703 Injection Pump communication line
0704 Injection Pump –spill valve
0705 Injection Pump –ECU
0706 Injection Pump –spill valve
0707 Injection Pump injection timing control
0802 Engine ECU
0804* Engine ECU
0807 Stop lamp switch
0901 Engine ECU
0902 Engine ECU relay
0903* Engine ECU
0905 Intake air pressure sensor
1003 EGR volume control valve
1004 Injection Pump –fuel cut out system

* These codes do not illuminate the Check Engine warning lamp.

--Andrew
Bit more info on the fault codes complements of mikegq

Quote:
Originally Posted by mikegq
Infomation Courtesey of Repco Autotech Encyclopedia 2006

Fault Code Table

Code # Circuit and Status

0102 Mass Air Flow Sensor
Circuit, Sensor or ECM failure

0103 Engine Coolant Temperature Sensor
(excessively high or low voltage at ECM)
Circuit, Sensor or ECM failure

0104 Vehicle Speed Sensor
(signal not sent when vehicle is in motion)
Circuit, Sensor or ECM failure

0203 Accelerator Position Switch (incorrect signal sent to ECM)

Accelerator Position Switch fault or ECM failure


0208 Overheating Fault
Cooling Fan system failure, Engine coolant re-filling procedure not followed,
Cooling system faulty, Engine lubrication problem

0301 ECM 2, failure (calculation function is malfunctioning)
Internal IC failure

0402 Fuel Temperature Sensor
(incorrect signal for fuel temperature received)
Refer to Injection Pump Control Unit
Circuit, Sensor or ECM failure

0403 Accelerator Position Sensor
(out of range signal received from sensor or switch assembly)

Circuit malfunction, Accelerator Position Sensor failure,
Accelerator Pedal Dual Contact Position Switch failure, ECM failure

0406 INT/AIR volume (excessively high signal from Mass Air Flow Sensor)
Air Duct, Charge Air cooler, Variable Nozzle Turbo Charger Control System,
Variable Nozzle Turbo Charger, Mass Air Flow Sensor failure, Circuit malfunction

0407 Crankshaft Position Sensor
Circuit, Sensor or ECM failure

0502 Battery voltage (excessively high voltage sent to battery)
Incorrect jump starting, Battery, Alternator, ECM

0504 Automatic Transmission Communication Line

(ECM receives incorrect voltage from Transmission ECM)
Circuit malfunction, Automatic Transmission ECM

0505 No faults detected
Monitored circuits are operating normally

0701 Camshaft Position Sensor
(incorrect signal from the Injection Pump Control Unit)
Refer to Injection Pump Control Unit
Circuit malfunction, Injection Pump Control Unit

0702 Top Dead Centre Pulse Signal
(incorrect signal from the Injection Pump Control Unit)

Refer to Injection Pump Control Unit
Circuit malfunction, Injection Pump Control Unit

0703 Pump Communication Line
(incorrect signal from the Injection Pump Control Unit)
Refer to Injection Pump Control Unit
Circuit malfunction, Injection Pump Control Unit

0704 Spill Valve Circuit
Circuit malfunction, Injection Pump Control Unit

0705 Pump Control Module
Circuit malfunction, Injection Pump Control Unit failure

0706 Spill Valve

Circuit malfunction, Spill Valve, Injection Pump Control Unit

0707 Fuel Injection Timing Control System
Circuit malfunction, Injection Pump Control Unit failure, Poor fuel quality

0802 Barometric Pressure Sensor (built into the ECM)
Internal circuit malfunction, ECM failure

0804 ECM internal input signal processing function malfunctioning
ECM failure

0807 Brake Light Switch
Circuit malfunction, Switch failure


0901 ECM Failure (calculation function is malfunctioning)
Internal IC failure

0902 ECM Relay (incorrect voltage received by the ECM from the relay)
Main Relay malfunction, Circuit malfunction

0903 ECM Internal input signal processing function malfunctioning
ECM failure

0905 Turbo Pressure
Circuit malfunction, Charge Air Pressure Sensor failure

1003 EGR Volume Control Valve
Circuit malfunction, EGR Volume Control Valve failure

1004 Fuel Cut System
Circuit malfunction, Injection Pump Control Unit failure, ECM failure

1401 to
1408 Nissan Anti Theft System

Refer to Anti Theft system information

[dirtygu]

ok so got a new maf engine light has gone out and no codescome up but still wont rev. every time i press down on the acel i can hear a fast electronic tic noise comingh from the fuel pump realese the pedal and the noise stops ect could it be the pump giving up ????