KONNWEI KW310 CAN OBDII+EOBD Code Reader User Manual

Specifications

• Display: Backlit, 128 x 64 pixel display with contrast adjustment
• Operating Temperature: 0 to 60°C (32 to 140 F°)
• Storage Temperature: -20 to 70°C (-4 to 158 F°)
• External Power: 8.0 to 18.0 V power provided via vehicle battery

Accessories Included

• OBD II cable: Provides power to the tool and communicates between the tool and vehicle.

Languages Supported

The tool supports the following languages: English, French, German, Dutch, Spanish, Russian, Portuguese.

1.0 General Information: On-Board Diagnostics (OBD) II

The first generation of On-Board Diagnostics (OBD I) was developed in 1988. The second generation, OBD II, was developed to improve the system. The OBD II system monitors emission control systems and key engine components through continuous or periodic tests. When a problem is detected, the Malfunction Indicator Light (MIL), often displayed as "Check Engine" or "Service Engine Soon", illuminates on the vehicle's instrument panel. The system also stores valuable information about the detected malfunction, including:

• Malfunction Indicator Light (MIL) status (on or off)
• Stored Diagnostic Trouble Codes (DTCs)
• Readiness Monitor status

1.1 Location of the Data Link Connector (DLC)

The DLC is a standardized 16-cavity connector used for scan tools to interface with the vehicle's on-board computer. It is typically located 12 inches from the center of the instrument panel (dash), under or around the driver's side. For some Asian and European vehicles, it may be located behind the ashtray, which must be removed for access. If the DLC cannot be found, consult the vehicle's service manual.

1.2 Diagnostic Trouble Codes (DTCs)

OBD II DTCs are stored by the on-board computer diagnostic system in response to vehicle problems. These five-digit alphanumeric codes help identify specific problem areas. The first character (a letter) indicates the control system, and the following four characters (numbers) provide details about the origin of the DTC and the conditions under which it was set. For example, a DTC P0202 indicates a specific malfunction in the fuel injector circuit.

DTC Structure Example:

Systems: P-Powertrain, B-Body, U-Network

Code Type: Generic (SAE) P0, P2, P34-P39; Manufacturer Specific P1, P30-P33

Sub-systems: 1- Fuel and Air Metering, 3- Ignition System or Engine Misfire, 5- Vehicle Speed Control and Idle Controls, 6- Computer Output Circuits, 7- Transmission Controls

1.3 OBDII Monitor Readiness Status

OBDII systems indicate whether the vehicle's PCM has completed testing on each component. Components tested are reported as "Ready" or "Complete". Readiness status allows inspectors to verify if all components and systems have been tested. The Power train Control Module (PCM) sets monitors to "Ready" or "Complete" after an appropriate drive cycle. Factors like erasing DTCs can reset Readiness Monitors to "Not Ready". Continuous monitors are always "Ready". Non-continuous monitors may be "Not Complete" or "Not Ready" if testing is incomplete. To achieve "Ready" status, drive the vehicle under various normal operating conditions, including highway and city driving, and allow for an overnight off period.

1.4 OBD II Definitions

• Power train Control Module (PCM): The on-board computer controlling the engine and drive train.
• Malfunction Indicator Light (MIL): The dashboard light (Service Engine Soon, Check Engine) indicating a detected problem. A steady light means a problem is detected and service is needed. A flashing light indicates a severe problem, discouraging vehicle operation. The MIL remains on until repairs are completed or the condition no longer exists.
• DTC (Diagnostic Trouble Codes): Codes identifying which section of the emission control system has malfunctioned.
• Enabling Criteria (Enabling Conditions): Vehicle-specific events or conditions that must occur for monitors to set or run, sometimes requiring a prescribed "drive cycle".
• OBD II Drive Cycle: A mode of vehicle operation to set all readiness monitors to "ready". It forces the vehicle's on-board diagnostics to run. A drive cycle is needed after DTCs are erased to set readiness monitors for future fault detection. Specific drive cycles vary by vehicle and monitor. Consult the Owner's Manual for details.
• Freeze Frame Data: A snapshot of vehicle operating parameters recorded when an emissions-related fault occurs, used to help identify the problem. It may include engine RPM, vehicle speed, air flow, engine load, fuel pressure, fuel trim value, engine coolant temperature, ignition timing advance, or closed loop start.

1.5 Vehicle Coverage

The KONNWEI KW310 is designed for all OBD II compliant vehicles, including those with the Control Area Network (CAN) protocol. Since 1996, all vehicles (cars and light trucks) sold in the United States must be OBD II compliant. Some 1994 and 1995 gasoline vehicles are also compliant. Verify compliance by checking the Vehicle Emissions Control Information (VECI) Label under the hood or near the radiator, which should state "OBD II Certified". All OBD II compliant vehicles must have a "common" sixteen-pin Data Link Connector (DLC).

1.6 Product Troubleshooting

Vehicle Linking Error

If the scan tool fails to communicate with the vehicle's ECU:

• Verify ignition is ON.
• Check if the OBD II connector is securely connected to the vehicle's DLC.
• Verify the vehicle is OBD2 compliant.
• Turn ignition off for 10 seconds, then turn back on and continue testing.
• Verify the control module is not defective.

Operating Error

If the scan tool freezes or the ECU is slow to respond:

• Press and hold the POWER button for at least 2 seconds to reset the scan tool.
• Turn ignition off for 10 seconds, then turn back on and continue testing.

Scan Tool Not Powering Up or Operating Incorrectly

• Check if the scan tool's OBDII connector is securely connected to the vehicle's DLC.
• Check if DLC pins are bent or broken; clean if necessary.
• Check vehicle battery to ensure it has at least 8.0 volts.

1.7 OBDII Diagnostics

When multiple vehicle control modules are detected, select the module for data retrieval (typically Power train Control Module [PCM] and Transmission Control Module [TCM]).

CAUTION: Do not connect or disconnect test equipment with the ignition on or engine running.

1. Turn the ignition off.
2. Locate the vehicle's 16-pin Data Link Connector (DLC).
3. Plug the scan tool cable connector into the vehicle's DLC.
4. Turn the ignition on. The engine can be off or running.
5. Press ENTER to enter the Main Menu. Use UP/DOWN scroll to select Diagnostics and press ENTER.
6. If you wish to erase data, press ENTER. Otherwise, use UP/DOWN to select NO and press ENTER. View system status (MIL status, DTC counts, Monitor status). Press any key for the Diagnostic Menu. If multiple modules are detected, select one.
7. Press ENTER to confirm. Observe messages displaying OBD2 protocols until the vehicle protocol is detected.

Linking Error: If a "LINKING ERROR!" message appears, re-verify ignition status, connector connection, and vehicle compliance. Turn ignition off for 10 seconds, then on, and repeat from step 5. If the error persists, contact your local distributor or customer service.

Erasing Data: Review stored data before erasing. If no data is stored, the prompt will not appear. Press ENTER to erase or use UP/DOWN to select NO and press ENTER to continue. View system status.

1.8 Reading Codes

• Codes can be read with the key on engine off (KOEO) or key on engine running (KOER).
• Stored Codes (Hard Codes/Permanent Codes): Cause the MIL to illuminate for emission-related faults.
• Pending Codes (Maturing Codes/Continuous Monitor Codes): Indicate problems detected during the current or last driving cycle but not yet considered serious. They do not turn on the MIL. Codes clear from memory if the fault does not recur within a certain number of warm-up cycles.

1.9 Erasing Codes

CAUTION: Erasing DTCs may also delete "Freeze Frame" data and manufacturer-specific enhanced data. It also resets I/M Readiness Monitor Status for all monitors to "Not Ready" or "Not Complete". Do not erase codes before the system has been checked by a technician. This function is performed with the key on engine off (KOEO). Do not start the engine.

2.0 Live Data

• View Data: Allows viewing of live or real-time PID data from vehicle modules. Select Live Data from the Diagnostic Menu and press ENTER.
• Record Data: Records vehicle modules' Parameter Identification (FID) data to diagnose intermittent problems. Includes 5 frames before and several frames after a trigger event.
• Playback Data: Allows viewing of previously stored PID data. Select Playback Data from the Live Data menu and press ENTER. Recorded data can be played back immediately after recording.

2.1 Viewing Freeze Frame Data

1. Select View, Freeze Frame from the Diagnostic Menu and press ENTER.
2. Wait for the scan tool to validate the PID MAP. Use DOWN scroll to view all data if it exceeds screen capacity.
3. If no freeze frame data is available, a message "No freeze frame data stored!" will appear. Use UP/DOWN to select a PID and press HELP to view its full name.
4. Press any button to return to the previous screen.

2.2 Retrieving I/M Readiness Status

The I/M Readiness function checks the vehicle's Emission System for compliance with state emissions programs. Some vehicles support two types of I/M Readiness tests:

• DTCs Cleared: Indicates monitor status since DTCs were erased.
• This Drive Cycle: Indicates monitor status since the beginning of the current drive cycle.

An I/M Readiness Status of "NO" does not necessarily mean the vehicle will fail inspection, as some states allow "Not Ready" monitors for passing.

Monitor status indicators: "OK" means diagnostic testing is complete. "INC" means testing is not complete. "N/A" means the monitor is not supported.

The screen may display MIL status (ON/OFF) and the status of various monitors, including:

• Misfire monitor
• Fuel System Monitor
• Comprehensive Components Monitor
• EGR System Monitor
• 02 Sensors Monitor
• Catalyst Monitor
• Evaporative System Monitor
• 02 Sensor Heater Monitor
• Secondary Air System
• Heated Catalyst Monitor
• A/C system Monitor

Example display for "This Drive Cycle" readiness test:

Press ESC to return to the Diagnostic Menu.

2.3 Oxygen Monitor Test

OBD2 regulations require monitoring and testing of oxygen (02) sensors for fuel efficiency and emissions. These tests are automatic and results are saved in the on-board computer. The 02 Monitor Test function retrieves and displays results for recent tests. It is not supported by vehicles using a controller area network (CAN). Refer to the "On-Board Mon. Test1" chapter for CAN-equipped vehicles.

2.4 On-Board Monitor Test

The On-Board Monitor Test is useful after servicing or erasing a vehicle's control module memory. It retrieves and displays test results for emission-related power train components and systems, both continuously and non-continuously monitored. Test and component IDs are determined by the vehicle manufacturer.

2.5 Component Test

The Component Test function initializes a leak test for the vehicle's EVAP system by commanding the vehicle's on-board computer. Vehicle manufacturers may have different criteria for stopping the test. Consult the vehicle service manual for instructions.

2.6 Viewing Vehicle Information

Use UP/DOWN scroll to select Component Test from Viewing Vehicle Information. The Vehicle Info function retrieves Vehicle Identification No. (VIN), Calibration ID(s), Calibration Verification Nos. (CVNs), and In-use Performance Tracking for vehicles supporting Mode 9.

2.7 Modules Present

The Modules Present function allows viewing of module IDs and communication protocols for OBD2 modules in the vehicle.

2.8 Warranty and Service Limited One Year Warranty

Konnwei warrants this product against defects in materials and workmanship for one year from the original purchase date. The warranty is limited to repair or replacement of the code reader at no charge with proof of purchase. This warranty does not cover damages from improper use, accident, flood, lightning, or unauthorized repairs. Konnwei is not liable for incidental or consequential damages. Information in this manual is based on the latest available data; Konnwei reserves the right to make changes without notice.

2.9 Service Procedures

For questions, contact your local store, distributor, or visit www.konnwei.com. For repairs, contact your local distributor.

3.0 Safety Precautions and Warnings

To prevent personal injury or damage to the vehicle/code reader, read this manual and follow these safety precautions:

• Perform automotive testing in a safe environment.
• Wear safety eye protection meeting ANSI standards.
• Keep clothing, hair, hands, tools, and equipment away from moving or hot engine parts.
• Operate the vehicle in a well-ventilated area; exhaust gases are poisonous.
• Block drive wheels and never leave the vehicle unattended while running tests.
• Use extreme caution around ignition coil, distributor cap, ignition wires, and spark plugs, as these components create hazardous voltages when the engine is running.
• Put the transmission in PARK (automatic) or NEUTRAL (manual) and engage the parking brake.
• Keep a fire extinguisher suitable for gasoline/chemical/electrical fires nearby.
• Do not connect or disconnect test equipment while the ignition is on or the engine is running.
• Keep the code reader dry and clean, free from oil/water or grease. Use a mild detergent on a clean cloth for cleaning.