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bramley007

Warning signs of an autobox on the way out - what are they?

39 posts in this topic

Recently I’ve noticed that changes from (I think) 2nd to 3rd sometimes aren’t very smooth and it feels like the car is slowing just before it changes gear, rather than the smooth and seamless shift it should be. Reverse is fine.

Oddly it was 100% fine this morning. In the last 7 days I’ve used D, S and M and there’s not really a consistent problem. It seems to be worse when cold, then goes away. It also seems to be worse when accelerating very slowly. I realise this is about as vague as it could be, sorry! Weird that one days it’s fine, then the next day it’s a bit jerky.

Any thoughts?

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Hi, the zf auto trans will always use the winter or "s" shift programme during the warm up cycle which means it will hold gears for a longer period before changing up, also uses the throttle actuator to back off the engine revs between gear changes, you may have a transmission mount issue or a propshaft guibo (rubber coupling) that is on its way out or even a dodgy abs sensor, may be worth having the autobox fluid level checked which must be done with the engine running and at running temperature, do you have access to a fault code reader may be worth having engine, transmission, and abs codes read. Where abouts do you live mate.

Cheers

Michael

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I have never used inpa before I only have the launch x-431, someone will know though, has the light that looks like a yellow cog ever came on the dash ?

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Inpa will read the gearbox codes

but you will need to know what the codes mean.

bentley manual or maybe michael.d.s. ^^^^ has them

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Its pretty extensive please contact me if you retrieve any codes.

A5S 310Z (5HP-18) - EGS 7.XX

CODE DEFINITION OF FAULT EGS

PIN OUT

POSSIBLE CAUSES

02 Solenoid Parking/Neutral lock 2 Break in wiring

Short in wiring

Defective valve winding

03 Solenoid valve 5 Break in wiring

Short in wiring

Defective valve winding

04 Solenoid valve 6 - Convertor lockup clutch Break in wiring

Short in wiring

Defective valve winding

05 Pressure regulator Break in wiring

Short in wiring

Defective valve winding

08 Shift Lever Position L2 8 Vehicle accelerated while shift lever in park or

neutral position

Engine was started and the EGS control has not

detected park or neutral position signal

09 Shift lever position L3/L4 37, 9 Break in wiring

Short in wiring

Short in sensor

12 Program selector switch 12, 13,

45

Short to ground

16 Turbocharger speed sensor 16, 44 No signal

Anomalous engine speed signal

18 Kickdown switch 18 Short to ground

Anomalous signal

19 ASC monitoring 19 Break in wiring

Short in wiring

EGS detected anomalous ASC signal

ASC operation detected while shift lever in park or

neutral

22 ATF sump temperature sensor 21, 22 Break in wiring

Short in wiring

26 Battery voltage + 26 Break in wiring

Check battery

Check charging system

30 Solenoid valve 1 30 Break in wiring

Short in wiring

Defective valve winding

31 Solenoid valve 4 31 Break in wiring

Short in wiring

Defective valve winding

32 Solenoid valve 3 32 Break in wiring

Short in wiring

Defective valve winding

33 Solenoid valve 2 33 Break in wiring

Short in wiring

Defective valve winding

35 Throttle valve signal (dtk) 35 Break in wiring

Short in wiring

Anamolous throttle valve signal

36 Shift lever position l1 36 Break in wiring

Short in wiring

Short in sensor

40 Engine intervention 40 Break in wiring

Short in wiring

41 Kva signal 41 Break in wiring

42 Transmission output rotation speed signal

(n-ab) - Stall speed signal

14, 42 No signal

Anomalous engine speed signal

43 Engine speed signal (n-mot) 43 No signal

Anomalous engine speed signal

53 Power supply - Solenoid valves 53 Relay in egs not switching

54 Batter voltage + 54 Battery voltage too low (>9 volts)

Check battery

Check charging system

100 Speed monitoring Trans/engine speed ratio not correct for gear

selected

Speed sensor signal faulty

Slip in transmission too high

101 EPROM checksum error Damaged EPROM

Program in memory faulty

Reinitialize power to EGS control unit

Replace control unit

102 Program checksum error Damaged EPROM

Program in memory faulty

Reinitialize power to EGS control unit

Replace control unit

103 Relay - EGS control unit Relay in EGS not switching in time

104 DKT- Temperature signal 35 Break in wiring short in wiring

Anomalous engine temperature signal

105 DKT - Throttle valve signal 35 Break in wiring short in wiring

Anomalous throttle valve signal

106 MUX injection rate DDE sending faulty injection rate signal

110 EGS control unit not programmed Have EGS control unit programmed

(150) CAN timeout 1 CAN signal not sent during engine start (ignition

on)

(151) CAN timeout 2 CAN signal not detected (engine running)

(152) CAN bus monitor Values in CAN ram storage not updated

(153) CAN status fault Control units with different CAN status' are

installed on the same bus

Replace with correct units

(154) CAN throttle valve signal Anomalous throttle valve signal detected by DME

(155) CAN load signal Anomalous load signal detected by DME

(156) CAN engine intervention DME cannot alter engine torque to match EGS

signal

DME does not match other CAN control units

(157) CAN engine temperature Anomalous engine temperature signal detected by

DME

(158) CAN engine speed signal Anomalous engine speed signal detected by DME

200 Kickdown not working

201 Sport car transmission feature not

selectable

202 Manual shift program feature not selectable

203 Program cannot be converted 6

204 No engine deceleration detected 24

205 Brake light

Brake light test switch

206 False code set

300 Diagnostic circuit fault

301 EGS voltage supply No voltage to EGS control unit

Check wiring harness

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he does not mention what car its for so maybe diff box as the one you describe ^^

mines a A5S440Z unless the fault codes are all pretty much the same on most ZF boxes ??

Edit :

on another note the A5S 310Z (5HP-18)was fitted to E34 M60 V8's

and the A5S560Z fitted to the E34 540 V8's.

These boxes were prone to failure and were a known weak point

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Ha ha fair point, 5hp18 and 5hp19 codes are very similar there is a few valve body codes that are different however the code description will cross match.

Assumption is the mother of all f&&k ups :)

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Cheers guys.

It's a 2003 530i Sport Touring, low OBC.

Michael, the Trans Safe warning came on once, about a year ago for about 3 minutes. The car had only just been started and I was in a hurry so put it in Sport then the light came on. It's not been on since then, and that's about 10k miles ago at a guess.

Car was fine yesterday and again today :?:)

Will plug INPA in over the weekend.

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I'd suggest resetting the adaptations and see if that helps.

 

My 530i didn't change very smoothly when I got it and resetting the adaptations made a real difference, (for the best :-)  )

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In my case with 523iA was rapidly slowing down and adding gas immediatly i could feel a bump in the gearbox as it shifted.. On my ex 530d it put safe mode twice and then voila it was over :)

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I'm experiencing a slight shunt between 1st and 2nd also, gonna plug her in and do the gearbox update :)

Don't rule out a MAF sensor fault either....

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I'm experiencing a slight shunt between 1st and 2nd also, gonna plug her in and do the gearbox update :)

Don't rule out a MAF sensor fault either....

What's the gearbox update and how?

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Well I use Autologic at work and I know that there is a gearbox update for it, where are you from?

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Well I use Autologic at work and I know that there is a gearbox update for it, where are you from?

 

Sunny Derby, miles away from you.

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I need a gearbox updates too as when I'm slowing down it feels like I've got warped disks but they are New so hopefully someone can help me thankyou I'm from Derby too

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I've been putting off the updates looking for the remap receipt code, but found it last week

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If you update the DDE aswell which ill be doing aswell as a MAF change, as far as I can see in the quite detailed history on this car... In 118k it's not seen a new one so I'm hoping after all of the above to see a massive improvement, Especially after I sort out the calliper sliders on the NSF which are getting 20degrees C hotter than the OSF

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