misterbishi
Member
- Joined
- Oct 11, 2018
- Messages
- 19
Hi guys,
I've got a 64 plate GX4H which I've had since September 2018. It has mostly performed well apart from a phantom drive bettery drain about once a week while parked at work, resulting in the battery level indicator dropping from around 2/3 full to 1/2 full while the car left parked, with a loss of 4-5 miles in range.
However, during the last 2 weeks, this has happened every day. As this was during the recent cold spell, I just put it down to a temperature-related issue, although it was annoying.
Yesterday morning, when I went to do the preheat via the mobile app there was message saying something like it had failed to charge. On checking the car I had an EV System Fault, along with a Brake System Fault and an ASC System Fault.
I called my Mitsubishi dealer, who informed me that the auxiliary battery was probably flat so I put it on charge and went to work.
On returning in the evening the car was completely dead, so I borrowed another charger with a fast charge option and left it charging overnight. I did initially try a trickle charge, but the battery would still discharge despite the charger being connected.
This morning the car had come back to life and had even started charging the drive battery. I noticed that the battery was still not fully charged according to the charger, but the car started up ok so disconnected the battery charger and left it charging the drive batteries.
About 10 minutes later, I was curious to see if the auxiliary battery was being charged from the mains, so I went to open the bonnet only to see the red chaging light on the dashboard rapidly flickering on and off. I tried to start the car but the EV System Fault was back.
I decided I needed to try and confirn if the auxiliary battery was good or not so I disconnected it from the car and took it to be tested by a local garage who confirmed it was good, although the coltage ws a little low. I tested it myself, and found it was around 12.8V and slowly rising when not connected, but only 11.4V when connected to the car. This seemed to indicate the issue was with the car somewhere, so I got it started by connected the fast charger again and drove the 15 miles to the dealership (all on battery).
The dealer hooked it up to the diagnostic machine, but there were no faults stored, and on testing the battery it came back as good (90% capacity remaining) and the voltage was normal. He also put an ammeter in series with the battery and told me it read about 100nA when the car was switched off.
I then got him to hook it up to the charging point, at which point the charge indicator started flickering again and despite disconnecting and reconnecting the chargng cable a dozen times, the car would not charge.
The dealer decided to go and get a torch so we could inspect the pins on the charging port more closely when suddenly we heard the charging station click and it began charging. After this it started charging every time, and after disconnecting and reconnecting the chargng cable another dozen times, we gave up and decided all we could do was monitor the situation to see if the fault returned.
On arriving home, I went to plug the car in and the charging indicator started flickering again. This time it only took one reconnection to get it working though. The voltage across the aux battery seemed ok (about 13.8V I think), although it was slowly falling again, and when I checked the current draw with everthing turned off, I got a reading that fluctuated between 1A and 1.5A. I tried to pull some fuses to see if I could pinpoint what was draining the battery, but the only one that seemed to make a difference was the IOD (Ignition Off Drain?) fuse, and it was getting cold outside so I called the dealer but he was not there, and despite requesting a call back I did not manage to speak to him again.
I let it carry on charging the drive battery until switched off by the timer a 5pm, and plan to let it sit overnight to see if the aux battery is flat in the morning. Out of curiosity I measured the voltage across the aux battery while it was charging the drive battery, and it was around 14.5V so it seems that charging the drive battery also charges the aux battery.
Has anybody else had an issue like this, and if so what was the outcome? Sorry for the long(ish) first post, but I wanted to include as much detail as possible.
I've got a 64 plate GX4H which I've had since September 2018. It has mostly performed well apart from a phantom drive bettery drain about once a week while parked at work, resulting in the battery level indicator dropping from around 2/3 full to 1/2 full while the car left parked, with a loss of 4-5 miles in range.
However, during the last 2 weeks, this has happened every day. As this was during the recent cold spell, I just put it down to a temperature-related issue, although it was annoying.
Yesterday morning, when I went to do the preheat via the mobile app there was message saying something like it had failed to charge. On checking the car I had an EV System Fault, along with a Brake System Fault and an ASC System Fault.
I called my Mitsubishi dealer, who informed me that the auxiliary battery was probably flat so I put it on charge and went to work.
On returning in the evening the car was completely dead, so I borrowed another charger with a fast charge option and left it charging overnight. I did initially try a trickle charge, but the battery would still discharge despite the charger being connected.
This morning the car had come back to life and had even started charging the drive battery. I noticed that the battery was still not fully charged according to the charger, but the car started up ok so disconnected the battery charger and left it charging the drive batteries.
About 10 minutes later, I was curious to see if the auxiliary battery was being charged from the mains, so I went to open the bonnet only to see the red chaging light on the dashboard rapidly flickering on and off. I tried to start the car but the EV System Fault was back.
I decided I needed to try and confirn if the auxiliary battery was good or not so I disconnected it from the car and took it to be tested by a local garage who confirmed it was good, although the coltage ws a little low. I tested it myself, and found it was around 12.8V and slowly rising when not connected, but only 11.4V when connected to the car. This seemed to indicate the issue was with the car somewhere, so I got it started by connected the fast charger again and drove the 15 miles to the dealership (all on battery).
The dealer hooked it up to the diagnostic machine, but there were no faults stored, and on testing the battery it came back as good (90% capacity remaining) and the voltage was normal. He also put an ammeter in series with the battery and told me it read about 100nA when the car was switched off.
I then got him to hook it up to the charging point, at which point the charge indicator started flickering again and despite disconnecting and reconnecting the chargng cable a dozen times, the car would not charge.
The dealer decided to go and get a torch so we could inspect the pins on the charging port more closely when suddenly we heard the charging station click and it began charging. After this it started charging every time, and after disconnecting and reconnecting the chargng cable another dozen times, we gave up and decided all we could do was monitor the situation to see if the fault returned.
On arriving home, I went to plug the car in and the charging indicator started flickering again. This time it only took one reconnection to get it working though. The voltage across the aux battery seemed ok (about 13.8V I think), although it was slowly falling again, and when I checked the current draw with everthing turned off, I got a reading that fluctuated between 1A and 1.5A. I tried to pull some fuses to see if I could pinpoint what was draining the battery, but the only one that seemed to make a difference was the IOD (Ignition Off Drain?) fuse, and it was getting cold outside so I called the dealer but he was not there, and despite requesting a call back I did not manage to speak to him again.
I let it carry on charging the drive battery until switched off by the timer a 5pm, and plan to let it sit overnight to see if the aux battery is flat in the morning. Out of curiosity I measured the voltage across the aux battery while it was charging the drive battery, and it was around 14.5V so it seems that charging the drive battery also charges the aux battery.
Has anybody else had an issue like this, and if so what was the outcome? Sorry for the long(ish) first post, but I wanted to include as much detail as possible.