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SAE J1979

Control parameters

The SAE J1979 standard has 8 control parameters.

How to read a parameter card

Absolute throttle position TP

Throttle position at idle will usually be more than 0%, and throttle position at wide open throttle will usually be less than 100%.

Pelican can show this parameter as the throttle position.

  • Request01 11
  • Service 01PID 11
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%
  1. The parameter's name and its ID in the OBDb. Confirmed shows when a response from a real car confirms the parameter.
  2. The clutch mark shows a Connectable, a parameter that Pelican surfaces in its interface.
  3. The service and PID/DID asked for, the control module it's sent to, and how often Pelican asks.
  4. The reply's bytes. The parameter's bytes are blue. Bytes for other parameters in the same reply are grayed out. Hover over a byte to see the parameter it represents.
  5. Where the parameter is in the response, and how Pelican converts the raw value into a value.
  6. A real reply, decoded. The raw value comes first, then the reading.
  7. Which model years have tested this parameter.

Absolute throttle position TP

Throttle position at idle will usually be more than 0%, and throttle position at wide open throttle will usually be less than 100%.

Pelican can show this parameter as the throttle position.

  • Request01 11
  • Service 01PID 11
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Absolute throttle position B TP_B

Pelican can show this parameter as the throttle position.

  • Request01 47
  • Service 01PID 47
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Absolute throttle position C TP_C

Pelican can show this parameter as the throttle position.

  • Request01 48
  • Service 01PID 48
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Relative throttle position TP_R

Relative or 'learned' throttle position.

  • Request01 45
  • Service 01PID 45
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Control › Pedals

Accelerator pedal position (relative) APP_R

  • Request01 5A
  • Service 01PID 5A
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Accelerator pedal position D APP_D

  • Request01 49
  • Service 01PID 49
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Accelerator pedal position E APP_E

  • Request01 4A
  • Service 01PID 4A
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

Accelerator pedal position F APP_F

  • Request01 4B
  • Service 01PID 4B
  • Module7E0 → 7E8
  • Every250 ms

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 100 ÷ 255)
Range
0 to 100 %
Unit
%

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