Civil Engineering Reference
In-Depth Information
Table 4.16
Emission-related diagnostic service definition OBDonCAN (ISO 15031-5 on ISO
15765-4)
Service Id
Description
0 × 01
Request current powertrain diagnostic data
The purpose of this service is to allow access to current emission-related data
values, including analog inputs and outputs, digital inputs and outputs and
system status information. The request for information includes a parameter-
identification (PID) value that indicates to the on-board system the specific
information requested. PID specifications, scaling information and display
formats are included in SAE J1979-DA
0 × 02
Request powertrain freeze frame data
The purpose of this service is to allow access to emission-related data values in
a freeze frame. This allows expansion to meet manufacturer-specific require-
ments not necessarily related to the required freeze frame, and not necessar-
ily containing the same data values as the required freeze frame. The request
message includes a parameter identification (PID) value that indicates to
the on-board system the specific information requested. PID specifications,
scaling information and display formats for the freeze frame are included in
SAE J1979-DA
0 × 03
Request emission-related diagnostic trouble codes
The purpose of this service is to enable the external test equipment to obtain
“confirmed” emission-related DTCs
Send a Service 0 × 03 request for all emission-related DTCs. Each ECU that has
DTCs shall respond with one (1) message containing all emission-related DTCs.
If an ECU does not have emission-related DTCs, then it shall respond with a
message indicating no DTCs are stored by setting the parameter of DTC to 0 × 00
0 × 04
Clear/reset emission-related diagnostic information
The purpose of this service is to provide a means for the external test equipment
to command ECUs to clear all emission-related diagnostic information. This
includes the following:
• MIL and number of diagnostic trouble codes (can be read with Service 0 × 01,
PID 0 × 01)
• Clear the inspection/maintenance (I/M) readiness bits (can be read with Ser-
vice 0 × 01, PID 0 × 01)
• Conirmed diagnostic trouble codes (can be read with Service 0 × 03)
• Pending diagnostic trouble codes (can be read with Service 0 × 07)
• Diagnostic trouble code for freeze frame data (can be read with Service
0 × 02, PID 0 × 02)
• Freeze frame data (can be read with Service 0 × 02)
• Status of system monitoring tests (can be read with Service 0 × 01, PID 0 × 41
• On-board monitoring test results (can be read with Service 0 × 06)
• Distance travelled while MIL is activated (can be read with Service 0 × 01,
PID 0 × 21)
• Number of warm-ups since DTCs cleared (can be read with Service 0 × 01,
PID 0 × 30)
• Distance travelled since DTCs cleared (can be read with Service 0 × 01, PID
0 × 31)
• Engine run time while MIL is activated (can be read with Service 0 × 01, PID
0 × 4D)
• Engine run time since DTCs cleared (can be read with Service 0 × 01, PID
0 × 4E)
• Reset misire counts of standardized test ID 0 × 0B to zero (can be read with
Service 0 × 06)
