P38A BCM test and repair

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
Richdove

Richdove

Well-Known Member
Posts
155
Location
Isle of Wight
Hi, long time since I posted here. Has anyone got a recommendation for the test and repair of the BCM. 98 P38, 4.6 HSE Jap import. The vehicle stopped (no Dash LED display) restarted moments later but couldn’t select drive (stuck in park) tried several times locking and unlocking and starting but same result. Left it for 10 minutes and it’s cleared the issue. I’m in no doubt the issue will resurface……
 
Stuck in "Park"? How do you mean "Stuck"?
The cable and the XYZ switch tell the Gearbox ECU what you are looking for (P/R/D/3/2/1), if that's FUBAR the box doesn't know what to do perhaps? When in park a locking pawl engages on the flywheel ring I think. Mine had a habit of not finding reverse. Adjusting the cable and mechanism sorted it as the XYZ switch was OK. I would check the state of your battery, the XYZ switch and the cable adjustment before going near the BeCM.
 
Unlikely to be the BECM at fault. Low battery volts, bad earths, lose or corroded 12 volt connections to the BECM or a duff fuse box are all more likely.
The BECM has no effect on gear selection.
 
US models have a shift-interlock solenoid so you have to press the brake pedal to get out of park. Not sure if Jap Imports also have this ?
 
pwood999 said:
US models have a shift-interlock solenoid so you have to press the brake pedal to get out of park. Not sure if Jap Imports also have this ?
Click to expand...

I thought all autos had some form of interlock?
but then I have not tried moving from P without pushing the brake.

J
 
Richdove said it's a Jap Import, not European.

1692990686085.png
 
pwood999 said:
Richdove said it's a Jap Import, not European.

View attachment 296153
Click to expand...
Gents, thank you for all the replies. Battery is around a year old, it was replaced at the same time as the alternator. When I said stuck, the vehicle logic/system wouldn’t allow the lever to be moved. There was nothing displayed on the dash when it shut down. The trip went to zero and the radio lost all settings. As I said, the thing is fine now. What would shut the vehicle down while driving at 30mph then allow a it to start but not be able to get it out of park. Thinking back, it has thrown a few engine disabled warnings in the past weeks. This cleared by locking and unlocking. It hasn’t required an EKU code which is handy as it wasn’t supplied with the vehicle. Do Jap imports use the EKU code?
 
Richdove said:
Gents, thank you for all the replies. Battery is around a year old, it was replaced at the same time as the alternator. When I said stuck, the vehicle logic/system wouldn’t allow the lever to be moved. There was nothing displayed on the dash when it shut down. The trip went to zero and the radio lost all settings. As I said, the thing is fine now. What would shut the vehicle down while driving at 30mph then allow a it to start but not be able to get it out of park. Thinking back, it has thrown a few engine disabled warnings in the past weeks. This cleared by locking and unlocking. It hasn’t required an EKU code which is handy as it wasn’t supplied with the vehicle. Do Jap imports use the EKU code?
Click to expand...
It's EKA Emergency Key Access not EKU. It's an option that can be turned off on all P38's.
A bad earth from chassis to engine can cause problems as can a duff fuse box, lift the lid and have a sniff, if there is any smell of burning that may be the problem. Corrosion inside the plastic sheath of one of the positive cables from the battery is another known problem. Just because the battery is only a year old does not mean it's OK. What voltage do you have after it has stood overnight?
 
Good morning gents, apologies it been so long in responding. The P38 is still in the service station..... Long story short. BcEM was sent to Turnermechatronics for test/repair. Fault found in one of the boards and repaired though it wasn't related to the problem. The unit was refitted earlier this week but now new faults......... suspension raises and lowers on its own accord. It locks and unlocks its self randomly, hazard lights illuminate but don't flash. Windows don't operate. the engine starts and drive can be selected. are these issues BcEM related or is this a Fuse Box/connector issue or an issue caused by removing and reinstalling the BcEM?

Thanks in advance for any advice.
 
Richdove said:
Good morning gents, apologies it been so long in responding. The P38 is still in the service station..... Long story short. BcEM was sent to Turnermechatronics for test/repair. Fault found in one of the boards and repaired though it wasn't related to the problem. The unit was refitted earlier this week but now new faults......... suspension raises and lowers on its own accord. It locks and unlocks its self randomly, hazard lights illuminate but don't flash. Windows don't operate. the engine starts and drive can be selected. are these issues BcEM related or is this a Fuse Box/connector issue or an issue caused by removing and reinstalling the BcEM?

Thanks in advance for any advice.
Click to expand...
Bad connections, faulty fuse box, white connectors at the base of the A post passenger side, or if you are dead unlucky, they have fecked your BECM. Make very sure that all the BECM connectors are free of corrosion and verdigris.
 
Richdove said:
Hi, long time since I posted here. Has anyone got a recommendation for the test and repair of the BCM. 98 P38, 4.6 HSE Jap import. The vehicle stopped (no Dash LED display) restarted moments later but couldn’t select drive (stuck in park) tried several times locking and unlocking and starting but same result. Left it for 10 minutes and it’s cleared the issue. I’m in no doubt the issue will resurface……
Click to expand...

More likely to be a dodgy earth. Later models had a second strap put somewhere.

Rick is the man for BECMs at CallRova. He's on here as @Rick-the-Pick - no-one else comes close and chances are they'll send it to him and charge a bit on top.
 
You must log in or register to reply here.

Similar threads

R
L322 Persistent injector driver circuit performance bank b fault
Replies
16
Views
3K
R53convert
R
MollyNomad
Freelander 1 ‘The Lambada’..(Three steps forwards..Two steps back/Rinse and repeat..) AKA Brakes Bled!!
Replies
0
Views
581
MollyNomad
MollyNomad
O
Strong crank but no start
Replies
14
Views
3K
Easysteam
E
SortedHSE
L322 L322 EAS (second-hand) ECU Replacement ?
2
Replies
38
Views
6K
holidaychicken
holidaychicken
D
Disco 2 Central Locking Problem and Three Amigos help needed.
Replies
15
Views
2K
Stanleysteamer
Stanleysteamer
Back
Top