ELM327 iPhone?has been a hot diagnostic scanner pair nowadays.

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ELM327?Software Download:
WIFI ELM 327 OBD2 Auto Scanner for IPhone Ipad IPod Software?(193,951.0K)
OBD2 ELM327 Bluetooth CAN-BUS Scanner Tool Software?(128,439.0K)
ELM 327 1.5V USB CAN-BUS Scanner Software (39,441.0K)
Why to buy ELM327 code reader?
Cheap but with powerful functions!!
That is, most ELM327 devices only for 5-20$ each.
But do a good job at:
1.Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database).
2.Clear trouble codes and turn off the MIL (“Check Engine” light)
3.Display current sensor data, including:
4.Engine RPM
5.Calculated Load Value
6.Coolant Temperature
7.Fuel System Status
8.Vehicle Speed
9.Short Term Fuel Trim
10.Long Term Fuel Trim
11.Intake Manifold Pressure
12.Timing Advance
13. Intake Air Temperature
14.Air Flow Rate
15.Absolute Throttle Position
16.Oxygen sensor voltages/associated short term fuel trims
17. Fuel System status
18.Fuel Pressure

Also, many protocols supported is one of reasons::

SAE-J1850 PWM (41.6 kbaud)
SAE-J1850 VPW (10.4 kbaud)
ISO 9141-2 (5 baud init, 10.4 kbaud)
ISO 14230-4 KWP (5 baud init, 10.4 kbaud)
ISO 14230-4 KWP (fast init, 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)

Pairing ELM327 Bluetooth Devices:
common steps for pairing ELM327 Bluetooth devices with smart phones, tablets, and PCs:
. Plug the ELM327 Bluetooth device into the OBD-II port
. Set the smart phone, tablet, or laptop to “scan” for available connections
. Select the ELM327 scan tool
. Input the pairing code
In most cases, the documentation that comes with an ELM327 Bluetooth scanner will include the pairing code and any special instructions that differ from that basic outline.
If no documentation is included, some common codes include:
? 0000
? 1234
? 6789
? 9999
If those codes don’t work, other sequential sets of four numbers are sometimes used.

What to Do if Pairing Fails?
If your ELM327 Bluetooth scanning device fails to pair with your smartphone, there are a number of potential causes:
- Caused by trouble connection to certain devices
How to do:
Try alternate pairing codes.
Pair the scanner with another iPhone.
(note: some scanner pairs just fine with a laptop while it refuses to connect to your phone)

- Caused by?length of time that the scanner remains discoverable
Most ELM327 Bluetooth scanners become discoverable as soon as you plug them in, but they stop being discoverable after a specific amount of time.
How to do:
If you make sure to perform the pairing operation within one minute of plugging the scan tool ELM327 into the OBD-II jack, there shouldn’t be an issue.

- Caused by?a faulty unit
This is the primary reason that it’s a good idea to stay away from cheap, clone scanners.
How to do:
to buy your?ELM327 scanner?from a retailer that will stand behind defective products.

轉載于:https://www.cnblogs.com/mywobd2/p/5035034.html

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