I have an intermittent fault which shows up as follows:-
Beep when ignition turned on, battery charge fault shows on display and starter motor will not operate.
I first had this fault about 5 weeks ago - called the AA and when they arrived car started with no problems other than the dipped headlight lamp on the dash was flashing. AA followed me to my local garage (not a Peugeot dealer) and garage checked battery and charging system and found no faults. They looked at the stored faults and found dozens of unrelated faults such as oil Temp, AC high pressure, Catalyst not present. Garage could find no problem and car was starting and running fine so I took the car home. The battery was fine according to the garage but as the SS had never worked since the battery was fitted 18 months ago and the radio would only stay on for a few minutes when the engine was not running so I fitted a new battery.
Car has been fine since then and the SS has been working until yesterday I tried to start the car and the fault returned. Battery was showing 12.77V so not flat. Alternator was not running so unless it has some clever onboard diagnostics I don't understand why that could be declared faulty. The fault persisted for about an hour and then disappeared and the car started, battery voltage 14.4V when running so alternator ok. Display showing front fog light error so switched them on to check and fault disappeared.
There are quit a few people who have had similar symptoms but nobody seems to have posted a definite solution.
I am trying to understand how the battery management system works so I can investigate further. There is a unit fitted to the battery negative terminal called variously Battery Charge Status Unit (BCSU), BECB or BCS.
I have also seen mention of a BPGA - Battery manager fuse box? This seems to control which items are supplied power and may explain why mirrors, starter motor and electric windows do not work when fault is present.
Can anyone tell me what the function of these 2 units are and which on is likely to be causing my problems?
Beep when ignition turned on, battery charge fault shows on display and starter motor will not operate.
I first had this fault about 5 weeks ago - called the AA and when they arrived car started with no problems other than the dipped headlight lamp on the dash was flashing. AA followed me to my local garage (not a Peugeot dealer) and garage checked battery and charging system and found no faults. They looked at the stored faults and found dozens of unrelated faults such as oil Temp, AC high pressure, Catalyst not present. Garage could find no problem and car was starting and running fine so I took the car home. The battery was fine according to the garage but as the SS had never worked since the battery was fitted 18 months ago and the radio would only stay on for a few minutes when the engine was not running so I fitted a new battery.
Car has been fine since then and the SS has been working until yesterday I tried to start the car and the fault returned. Battery was showing 12.77V so not flat. Alternator was not running so unless it has some clever onboard diagnostics I don't understand why that could be declared faulty. The fault persisted for about an hour and then disappeared and the car started, battery voltage 14.4V when running so alternator ok. Display showing front fog light error so switched them on to check and fault disappeared.
There are quit a few people who have had similar symptoms but nobody seems to have posted a definite solution.
I am trying to understand how the battery management system works so I can investigate further. There is a unit fitted to the battery negative terminal called variously Battery Charge Status Unit (BCSU), BECB or BCS.
I have also seen mention of a BPGA - Battery manager fuse box? This seems to control which items are supplied power and may explain why mirrors, starter motor and electric windows do not work when fault is present.
Can anyone tell me what the function of these 2 units are and which on is likely to be causing my problems?
