[VIDEO] Checking Error Codes

[jp2code]

Originally Posted by Edit

NOTE: Before checking for codes, you should make sure the Ignition Timing is set correctly on your engine. Incorrect Ignition Timing can cause all sorts of problems.

Here is a little 5-minute video to give you an idea of how to do that.

I made this quick video yesterday to show how to check the error codes on a Nissan D21 Hardbody with the newer ECU (not the ODBII ECU):



That should help to explain this diagram:



If anyone has a video on how to check the older ECUs, please share it here.

This video was from Deerhurst:



Once you have your codes written down, here are links to what they mean:

ECU / Check engine light - Diagnostic Codes

Links to TroubleCodes.net

• Nissan Trouble Code Info
• Pre-88 Nissan Trouble Code Info
• 88–94 & 95 Pathfinder, Quest, Truck & 300ZX Trouble Code Info

RedAggie03 did a trouble code post:

ECU / Check engine light - Diagnostic Codes

I've copied the data here, for you One-Stop Shopping:

KA24E Codes:
11 Crankshaft Position Sensor Circuit
12 Mass Air Flow Sensor Circuit
13 Engine Coolant Temperature Sensor Circuit
14 Vehicle Speed Sensor Circuit
21 Ignition Signal Missing in Primary Coil
31 Engine Control Unit (ECU)
33 Oxygen Sensor Circuit
41 Air Temperature Sensor Circuit
43 Throttle Position Sensor Circuit
55 No Malfunctions

Complete list of Codes for other models:
11 Crank Angle Sensor/Camshaft Position Sensor
12 Air Flow Meter/Mass Air Flow Sensor
13 Engine Coolant Temperature Sensor
14 Vehicle Speed Sensor
21 Ignition Signal
22 Fuel Pump
23 Idle Switch
24 Throttle Valve Switch
25 Idle Speed Control Valve
28 Cooling Fan Circuit
31 ECU
32 EGR Function
33 Heated Oxygen Sensor
34 Knock Sensor
35 Exhaust Gas Temperature Sensor
36 EGR Control-Back Pressure Transducer
37 Knock Sensor
38 Right-hand bank Closed Loop (B2)
41 Intake Air Temperature Sensor
42 Fuel Temperature Sensor
43 Throttle Position Sensor
45 Injector Leak
47 Crankshaft Position Sensor
51 Injector Circuit
53 Oxygen Sensor
54 A/T Control
55 No Malfunction
63 No. 6 Cylinder Misfire
64 No. 5 Cylinder Misfire
65 No. 4 Cylinder Misfire
66 No. 3 Cylinder Misfire
67 No. 2 Cylinder Misfire
68 No. 1 Cylinder Misfire
71 Random Misfire
72 TWC Function right-hand bank
73 TWC Function right-hand bank
76 Fuel Injection System Function right-hand bank
77 Rear Heated Oxygen Sensor Circuit
82 Crankshaft Position Sensor
84 A/T Diagnosis Communication Line
85 VTC Solenoid Valve Circuit
86 Fuel Injection System Function right-hand bank
87 Canister Control Solenoid Valve Circuit
91 Front Heated Oxygen Sensor Heater Circuit right-hand bank
94 TCC Solenoid Valve
95 Crankshaft Position Sensor
98 Engine Coolant Temperature Sensor
101 Front Heated Oxygen Sensor Heater Circuit right-hand bank
103 Park/Neutral Position Switch Circuit
105 EGR and EGR Canister Control Solenoid Valve Circuit
108 Canister Purge Control Valve Circuit

The following data was provided on 27 Jan 2016 from Deerhurst for the pre-1988 model trucks:

Originally Posted by Deerhurst

Here goes, an XLXS file for 86-89 z24i and VG30i. 3 tabs at the bottom for engine/year variation.

https://drive.google.com/file/d/0B2Y...ew?usp=sharing

Info from my Chiltons for 1970-88 pickup and Pathy.

Here is a screenshot summary of that data:



Updated 2016 May 06: Contribution from Reserector in another thread

Originally Posted by Reserector

Since you own a 1987 truck, scroll down to the bottom of that post. Yours does not have a place for a screwdriver. It only has a toggle switch that selects between running data and stored data.

Expose the ECU, set the brake, shift into neutral' and turn the key to "ON" without starting it. You should see the LEDs flashing in sequence. If not, flip the switch the other way.

Now, fully press and release the gas pedal one time.
Press the clutch and shift into first. Release the clutch.
Press the clutch and shift back into neutral. Release the clutch.

The only code you should see is 44. Four long blinks followed by four short blinks.

...
[This technique] clears two codes that will otherwise persist. 24 Neutral switch, and (if memory serves) 42 TPS.

Here is a good page of tutorials that Tony provided:

Originally Posted by ahardb0dy

Good info on diagnostics here:

http://easyautodiagnostics.com/nissan/main-index

This was added 2020 OCT 07:

Originally Posted by jp2code

In the 1986.5 Service Manual, Code 31 is the load switch for the VG30i. It detects a malfunction in the headlamps, the blower motor, or the rear defogger.

Oddly, the Z24i does not list a Code 31 at all.

Page EC-40 of the 1986.5 Service Manual talks about the self-diagnostic system. Item "b" near the middle of the page says, "Self-diagnostic items, code No. 24 and 31 are displayed as N.G. (that's NO GO), even if they are O.K., every time self-diagnostic inspection is performed."

That leads me to think that it is safe to ignore codes 24 and 31.

The ECU will show a malfunction signal every time the ignition switch turns "ON" and the switch circuit is short or open.

[cadillacdude1975]

sounds like you were in a hailstorm lol

[jp2code]

Dude in that video sounds a little bit like like a hick, too. What's up with that? I thought it was Mater from Cars there for a second.

I got a decent ways into that video when the rain started, and I was like, "Really? Right now?" I didn't have a way to make a stored code pop back up again, or I would have re-recorded it.

That's my little tin roof over the shed I built for it (old pic):

[cadillacdude1975]

i'd give anything for a garage or a carport.

[CarolinaBirdDog]

Great info, thanks for passing it along!!!!

[Deerhurst]

Originally Posted by jp2code

Dude in that video sounds a little bit like like a hick, too. What's up with that? I thought it was Mater from Cars there for a second.

You taking about me? I'll have to do another and better video. I know I sounded pretty hillbilly in my header video. Funny thing is, I'm from California and now live in Oregon!

[TheЯepairMan]

Thanks for this!

[cadillacdude1975]

my ECM is the pathfinder version. it has the grey plastic cover that protects the toggle switch.

it also has the window like deerhurts. when its powered on, it flashes 1, 2, 3, 4 then 5 and starts over. you have to wait until it flashes three, then flip the switch before it starts to flash 4 times. then it will start throwing codes via the red and green lights.

[86NissanV6]

Originally Posted by jp2code

Dude in that video sounds a little bit like like a hick, too. What's up with that? I thought it was Mater from Cars there for a second.

I got a decent ways into that video when the rain started, and I was like, "Really? Right now?" I didn't have a way to make a stored code pop back up again, or I would have re-recorded it.

That's my little tin roof over the shed I built for it (old pic):

Couldn't tell it was old. I mean it's not like you put Titan wheels on it or anything.

[CarolinaBirdDog]

How do you know which one you have? ~newer or older~?