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Honda Accord CR2 2013-2019 battey sensor operation and testing

alyways annoyed that you cant find the info on how to test this stuff people never post in plain english

so heres what i know

P154A (battery sensor internal failure) stored. In this case, the battery sensor has an internal failure and must be replaced. 
here is the test steps

pin 1 blue = lin bus square wave
pin 2 red = battery voltage
pin 3 green = faint ground signal
yellow at alternator same as blue wire

SENSOR NOW WORKS WHEN THE HEAD LIGHTS ARE TURNED ON ONLY

THE BATTERY VOLTAGE IS NOW AT 14.3V
ELD VALUE IS 213.5 AMPS

BATTERY CURRENT SENSOR IS 15.7AMPS

WHEN HEAD LIGHTS ARE TURNED OFF THE BATTERY VOLTAGE GOES DOWN TO 12.3VOLTS NO OTHER WAY TO GET VOLTAGE UP

TST DRIVE VEHICLE TO CHECK ALTERNATOR VOLTAGE OUTPUT

WIRING DIAGRAM

both square waves will be the same
if not the same wiring issue
if the same alternator is not charging then the alternator is no good.
if the alternator is charging and the signals the same the sensor is no good.

Wiring on the sensor its self

Honda battery sensor – resistance testing with sensor out of car – this was not correct for my vehicle unless the plug is up side down (we are in Australia)

i have 2.75M ohms on both pin 1 and pin2 ??????????????????????

this is the 2 wire unit cant find a wiring diagram on my end

After all that here is what I have measured when I bit the bullet and bought a new one

never a walk in the park with a vehicle that has 245.000kms

Fuel Trims Are Adding Fuel As The System Is Running Lean
Conduct Road Test And Found That The Fuel Trims Are Causing The Check Engine Light To Come On


The Fuel Trims Are Suspect That The Systems Has Air Leaks Of Air Flow Meter Fault It Also Shows That There Is A Fuel Delivery Problem
Disconnect Fuel Lines And Connect A Fuel Pressure Gauge
Found Fuel Pressure Is Solid At 300kpa, Slightly Lower Than Expected We Noted That Autodata Says(spec Is 300-350kpa) This Is Correct
The Same Engine In An Aurion Is 350-400kps Specification
So A Little Low There,
Cleaned Air Flow Meter And Fuel Trims Have Come Down From +35% To +20%
Carried Out A Throttle Body Clean And Upper Cylinder Clean
Put In Some Lifter Free Into The Oil Ass The Idle Has Slightly Unstable Carried Out Cranking Compression Test And Showed With Tolerance,

After Some Time Running The Vehicle The Fuel Trims Have Come Down To +10% To +15%
Getting Closer When Accelerating The Engine It Felt Sluggish,
So An Air Mass Meter Was Purchased And Installed (after Market ) It Was Found That The Fuel Trims Where In Fact Worse, So The After Market Crap Unit Was Sent Back And A Genuine Unit Was Installed!!
At Last The Fuel Trims And Acceleration Was Back Fuel Trims Average At +3% Mark


Drove The Vehicle Home 35 Min Drive And The Vehicle Felt Sluggish Again, Tested The Fuel Trims To See If Any Changes And Found That Fuel Trims Had Gone Worse Than Ever Back To +44% A Fuel Trims and Air Flow Meter Test Was Done Again And Only The Fuel Delivery Side Was Bad
Remove The Seat And Gained Access To The Fuel Pump And Found The Pre Filter Had A Layer Of Mud And Pet Hair,cleaned The Pre filter And Washed The Fuel Pump Bowl Refitted To Vehicle And Test Driven Again For The 35 Mins And Found The Vehicle Is Now Free From Errors, And All Power Is Restored At 200 hp

Initial Repairs to vehicle

So your typical commodore having the fault light on and P0009: Engine position sensor bank 2 fault is displayed,

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Previous Repairs, and the short story

The vehicle was delivered to us after talks about the original issue with the vehicle, which was poor performance and fuel trims high +45.

During the Conversation about the vehicle it was decided that a new air flow meter be installed and the vehicle test driven to confirm the fuel trims are coming back into line (+ or – 6%)
The vehicle was fitted with a new aftermarket air flow meter and fuel trims checked on the test drive.

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Holden Commodore VE – 04/2008 LEO V6 Engine – Random stalling

the 2 fault codes present every time after we scanned this vehicle was

Engine ECU
p0850 – Park/neutral signal Circuit Incorrect.
Audio System
(fixed this one too)
B101d-3c – Ecu, Hardware Performance fault.

Time to get out the workshop manual and start testing the circuits.
we did find a few things online that did not mean much at the time but might help down the track


Diagnostic Trouble Code Results for B101D for the Holden Commodore (VE)
EedHolden 
Diagnostic Trouble Code: B101D
Diagnostic Trouble Code Name: ECU Hardware
Vehicle Make: Holden
Vehicle Model: Commodore (VE)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
Please Note: The DTC Information provided has been randomly generated.
To view the correct Diagnostic Code Information, Please Login, or Register. Diagnostic Trouble Code Description: Throttle position sensor (TP1) out of self-test range.

Possible Module Faults
Accelerator pressed during self-test when not required. (Possible cause, driver pressing throttle at or just after key-on.)
this does not state if this fault is in the radio or the Engine ECU

none of the above was the fault,

after seeing the vehicle week after week, when the vehicle was playing up the throttle was removed and it was found that the throttle blade was sticking, removed and cleaned out the pivots and flushed with carby cleaner,

refitted to vehicle and it has not played up since,
so dont worry about the fault codes they have nothing to do with it, just a dirty throttle in the pivot bushes, so removed the throttle body and clean properly and you will find it works better.

We have started to collaborate live data sets and possible control unit resets to vehicles as there is just too many variants in vehicles these days, and the live data at idle varies between models,

AVAILABLE CONTROL MODULES

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Ford Falcon body control modules FG1 & FG2

A vehicle came in this week and BCM replaced with new unit supplied from ford, a local locksmith had carried out key programming and parameter reset, got the vehicle started (cool)

Post starting the vehicle, the vehicle locks did not work correctly and the BCM configuration thought it was a 4wd and a wagon ( no way)
1. the door ajar switch is open when door closed and closed when door open.
so the BCM is wired differently or opposite in the FG2 Compared with the FG1

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Long awaited LDV service resets there has been little information about these vehicles online that’s about to change.
These great cars have come across the seas to our country and now have been a part of us for a while, but the lack of knowledge outside the dealer network and the lack of transparency it’s shocking for a company that wants to get it name out 

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MITSUBISHI OUTLANDER 2004 4G64 4 CYLINDER IDLE STEPS ON IAC

IDLE SPEED 690 ENGINE TEMP MORE THAN 80DEG
IN PARK
AIR ON OFF IAC VALVE STEP 57
AIR CON ON STEPS GO TO 70
IDLE SPEED WITH AIR CON 750
WHEN COLD IDLE SPEED SHOULD START AT 1500 RPM
AIR MASS FREQUENCY AT IDLE :

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