Cannot connect OBD2 reader to my '99 Legacy?
04 May 2018, 09:07 PM
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Cannot connect OBD2 reader to my '99 Legacy?
Well hello forum. I seek your expertise on error code scanners. I have a 2001 Impreza and a 1999 Legacy and the Impreza was rejected in its yearly check because an intermittent check-engine light happened to be on at the time. It turned out to be P0340, camshaft position. The Legacy has been running poorly for some time and the check-engine light comes on sometimes. I wanted to look into this stuff so I bought myself a scanner.
This one is called Dibotech OBD-2 scanner. I've seen ones online that look identical called VAG so I guess it is a common chinese product sold with different labels on it, it was like 100 USD. I hooked it up to the 2001 Impreza and it connected without issue and displayed the "old" code. I will order the sensors and replace them and then delete the code but for now I have only checked that it connects.
Buut: When I tried hooking it up to my trusty ol' Legacy it lit up, chewed through the different protocols for a while but could not connect, I tried a few times, checked the connector and cables and so on. Google told me to check all the fuses and they are all good. I read that on some Subarus the cigarette fuse needs to be good for the OBDII port to work. Regarding that, I did kill the lighter outlet years ago when I ran the living hell out of a 12V compressor with it and it has not worked since but the fuse is good with voltage on both sides. But since the scanner lights up it obviously has power so that should not be an issue I guess?
Is there any reason for this particular scanner not to work on my old Legacy? The supported protocols in the device info reads like this:
ISO15765-4 (CAN)
ISO14230-4 (KWP2000)
ISO9141-2
SAE J1850 PWM (41.6 kbaud)
SAE J1850 VPW (10.4 kbaud)
ISO 15765-4 CAN (11 bit ID, 500 kbaud)
ISO 15765-4 CAN (29 bit ID, 500 kbaud)
ISO 15765-4 CAN (11 bit ID, 250 kbaud)
ISO 15765-4 CAN (29 bit ID, 250 kbaud)
ISO 14230-4 KWP (5 baud init, 10.4 kbaud)
ISO 14230-4 KWP (fast init, 10.4 kbaud)
ISO 9141-2 (5 baud init, 10.4 kbaud)
Should I return it and get another model or is there anything else I can try?
This one is called Dibotech OBD-2 scanner. I've seen ones online that look identical called VAG so I guess it is a common chinese product sold with different labels on it, it was like 100 USD. I hooked it up to the 2001 Impreza and it connected without issue and displayed the "old" code. I will order the sensors and replace them and then delete the code but for now I have only checked that it connects.
Buut: When I tried hooking it up to my trusty ol' Legacy it lit up, chewed through the different protocols for a while but could not connect, I tried a few times, checked the connector and cables and so on. Google told me to check all the fuses and they are all good. I read that on some Subarus the cigarette fuse needs to be good for the OBDII port to work. Regarding that, I did kill the lighter outlet years ago when I ran the living hell out of a 12V compressor with it and it has not worked since but the fuse is good with voltage on both sides. But since the scanner lights up it obviously has power so that should not be an issue I guess?
Is there any reason for this particular scanner not to work on my old Legacy? The supported protocols in the device info reads like this:
ISO15765-4 (CAN)
ISO14230-4 (KWP2000)
ISO9141-2
SAE J1850 PWM (41.6 kbaud)
SAE J1850 VPW (10.4 kbaud)
ISO 15765-4 CAN (11 bit ID, 500 kbaud)
ISO 15765-4 CAN (29 bit ID, 500 kbaud)
ISO 15765-4 CAN (11 bit ID, 250 kbaud)
ISO 15765-4 CAN (29 bit ID, 250 kbaud)
ISO 14230-4 KWP (5 baud init, 10.4 kbaud)
ISO 14230-4 KWP (fast init, 10.4 kbaud)
ISO 9141-2 (5 baud init, 10.4 kbaud)
Should I return it and get another model or is there anything else I can try?
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