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OPERATION

OPERATION

HOW TO USE OBD-II GENERAL SCAN TOOL

Prepare a general scan tool (OBD-II general scan tool) required by SAE J1978.

Open the cover and connect the OBD-II general scan tool to data link connector located in the lower portion of instrument panel (on the driver’s side).


Using the OBD-II general scan tool, call up DTC and freeze frame data.

OBD-II general scan tool functions consist of:

MODE $01: Current powertrain diagnostic data

MODE $02: Powertrain freeze frame data

MODE $03: Emission-related powertrain DTC

MODE $04: Clear/Reset emission-related diagnostic information

MODE $06: Request on-board monitoring test results for non-continuously monitored systems

MODE $07: Request on-board monitoring test results for continuously monitored systems

MODE $09: Request vehicle information

Read out the data according to repair procedures. (For detailed operation procedures, refer to the OBD-II General Scan Tool Operation Manual.)

Note

For details concerning DTC, refer to the List of Diagnostic Trouble Code (DTC).


MODE $01 (CURRENT POWERTRAIN DIAGNOSTIC DATA)

Refers to data denoting the current operating condition of analog input/output, digital input/output and/or the powertrain system.

A list of the support data and PID (Parameter Identification) codes are shown in the following table.

PID Data Unit of measure
01

Number of emission-related powertrain DTC and malfunction indicator light status and diagnosis support information

—

03

Fuel system control status

—

04

Calculated engine load value

%

05

Engine coolant temperature

°C

06

Short term fuel trim

%

07

Long term fuel trim

%

0B

Intake manifold absolute pressure

kPa

0C

Engine revolution

rpm

0D

Vehicle speed

km/h

0E

Ignition timing advance

°

0F

Intake air temperature

°C

10

Air flow rate from mass air flow sensor

g/sec

11

Throttle valve absolute opening angle

%

13

Check whether oxygen sensor is installed.

—

15

Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor

V and %

1C

Supporting OBD system

—

24

A/F value and A/F sensor output voltage

— and V



Note

Refer to OBD-II general scan tool manufacturer’s instruction manual to access generic OBD-II PIDs (MODE $01).


MODE $02 (POWERTRAIN FREEZE FRAME DATA)

Refers to data denoting the operating condition when trouble is sensed by the on-board diagnosis system.

A list of the support data and PID (Parameter Identification) codes are shown in the following table.

PID Data Unit of measure
02

DTC that caused CARB required freeze frame data storage

—

03

Fuel system control status

—

04

Calculated engine load value

%

05

Engine coolant temperature

°C

06

Short term fuel trim

%

07

Long term fuel trim

%

0B

Intake manifold absolute pressure

kPa

0C

Engine revolution

rpm

0D

Vehicle speed

km/h

0E

Ignition timing advance

°

0F

Intake air temperature

°C

10

Air flow rate from mass air flow sensor

g/sec

11

Throttle valve opening angle

%

15

Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor

V and %

1C

Supporting OBD system

—



Note

Refer to OBD-II general scan tool manufacturer’s instruction manual to access freeze frame data (MODE $02).


MODE $03 (EMISSION-RELATED POWERTRAIN DIAGNOSTIC TROUBLE CODE (DTC))

Refer to Read Diagnostic Trouble Code (DTC) for information about data denoting emission-related powertrain DTC.

MODE $04 (CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION)

Refers to the mode used to clear or reset emission-related diagnostic information (OBD-II trouble diagnostic information).

Note

Refer to OBD-II general scan tool manufacturer’s instruction manual to clear or reset emission-related diagnostic information (MODE $04).


MODE $06

Refer to test value of troubleshooting and data of test limit on support data bit sequence table. List of support data is shown in the following table.

TID CID Test value & Test limit
$01

$01

Rear oxygen sensor circuit (Bank 1 Sensor 2)

$02

$81

$01

Catalyst system

$82

$01

Exhaust gas recirculation system

$02

$83

$01

Evaporative emission control system (0.04 inch leak)

$02

Evaporative emission control system (0.04 inch leak)

$03

Evaporative emission control system (0.04 inch leak)

$04

Evaporative emission control system (0.04 inch leak)

$05

Evaporative emission control system (0.02 inch leak)

$06

Evaporative emission control system (0.02 inch leak)

$84

$01

Front oxygen (A/F) sensor circuit slow response (Bank 1 Sensor 1)

$85

$01

Rear O 2 sensor circuit slow response (Bank 1 Sensor 2) Rich → Lean

$02

Rear O 2 sensor circuit slow response (Bank 1 Sensor 2) Lean → Rich



MODE $07

Refer to data of DTC (pending code) for troubleshooting result about emission in first time.

MODE $09

Refer to data of vehicle specification (VIN, calibration ID, diagnosis frequency etc.).