What causes OBD not to work?
The most common cause of an OBD scanner that won’t turn on is a blown fuse on the vehicle’s OBD socket power supply circuit. If the check engine light fails to aluminate, you ca be sure the fuse has blown. Checking the vehicle’s fuse box and replacing the blown fuse fixes the issue.
How do I know if my ECU is fried?
Here are the most common symptoms of a bad ECU:
- Check Engine Light stays on after resetting.
- Car was jump started on reverse polarity.
- Engine turning off for no reason.
- Water Damage or Fire Damage on the ECU.
- Apparent loss of spark.
- Apparent loss of injection pulse or fuel pump.
- Intermittent starting problems.
- Overheating ECU.
How do I know if my ECU is working?
Usually a bad or failing ECU will produce a few key symptoms that can alert the driver of a potential issue.
- Check Engine Light comes on. An illuminated Check Engine Light is one possible symptom of a problem with the ECU.
- Engine stalling or misfiring.
- Engine performance issues.
- Car not starting.
What cars are compatible with obd2?
1996 or newer model year vehicle sold in the United States. United States legislation requires all cars and light trucks model year (MY) 1996 and newer to be OBD-II compliant.
How do I connect to my ECU?
ECU programming guide
- Connect the vehicle interface cable to the OBD-II connector and turn the ignition switch to ON.
- Open the ProECU software and choose Tools then Detect Vehicle.
- Select Program Engine ECU.
- Choose Query ECU to identify the ECU version fitted to the car.
What to do if the OBD II scanner doesn’t communicate with the vehicle?
What to do if the OBD II scanner doesn’t communicate with the vehicle. TEST 1: Connect the positive DMM lead to DLC pin 4 and the negative DMM lead to the negative battery terminal, using jumper wires if necessary. Do not connect to the body or chassis ground but to the battery terminal directly.
What causes no start with no ECM communication?
2007 Tundra 4.7 air injection check valve was the cause of no communication with scanner, no start. Thanks Click to expand… That’s why we’re here Greg. Thanks for working on Toyota’s.
Can a smog scanner be connected to an OBDII port?
Click to expand… Yes, the smog place brought out their scanner, hooked it up to the OBDII port and scanned for I’m assuming fault codes and/or maybe specifically for a check engine fault code that would automatically fail my truck’s smog test. No experience here, but from what you’ve posted I would suspect that the “helpful” tech had your answer.
Can a torque Pro plug in Elm 327 OBD2 scanner?
So I bought a Torque Pro plug in ELM 327 OBD2 scanner for my phone, but when I plug it in there is no communication. So I went to FLAP and they plugged in their scanner, and it says no communication, just like mine. So I looked at the plug in under the dash, and only four the many holes actually have contacts.