Konnwei KW870 User Manual

1. Product Profile

The KW870 is a 2-in-1 Car Battery Tester and OBDII Diagnostic Tool. It is compatible with all 1996 and newer 12V gasoline and diesel vehicles that comply with OBD II standards. The device can identify the cause of a 'Check Engine' light and assist in passing emissions tests. It supports all OBDII/EOBD engine system diagnostic functions, including O2 sensor tests, EVAP system tests, and dashboard monitoring. The live data stream, displayed graphically and numerically, helps in identifying faulty sensor readings.

The KW870 Battery Tester utilizes advanced conductance testing technology to accurately measure the battery's actual cold-cranking amps (CCA) capacity, its overall health (SOH), and common faults in the vehicle's starting and charging systems. It supports various battery types including ordinary lead-acid, AGM flat plate, AGM spiral, gel, and lithium batteries. The tool supports multiple languages: English, French, German, Dutch, Spanish, Russian, Portuguese, Italian, and Polish.

2. Technical Parameters

Voltage Measurement Range: 6-16V DC

Cold Cranking Amps (CCA) Measurement Range:

Standard Definitions:

• CCA: Cold Cranking Amps, specified by SAE & BCI, the most used value for starting a battery at 0°F (-18°C).
• BCI: Battery Council International standard.
• CA: Cranking Amps standard, effective value of starting current at 0°C.
• MCA: Marine Cranking Amps standard, effective value of starting current at 0°C.
• JIS: Japan Industrial Standard, displayed on the battery as a combination of numbers and letters (e.g., 55D23, 80D26).
• DIN: German Automobile Industry Committee standard.
• IEC: International Electrotechnical Commission standard.
• EN: European Automobile Industry Association standard.
• SAE: Society of Automotive Engineers standard.

3. Main Menu Description

The main menu provides access to several functions:

• OBDII Diagnosis Menu
• Car Battery Check Menu
• Motorcycle Battery Tester Menu
• Review
• DTC Lookup
• Print Data
• Tool Setup
• Help

3.1 Choose "Diagnosis" for OBDII Diagnosis

When connected to a car, the device displays the 'Monitor Status'.

After connecting the OBDII to the car, press 'Enter' to access 9 functions:

• Read Codes
• Erase Codes
• I/M Readiness
• Data Stream
• Freeze Frame
• O2 Sensor Test
• On-Board Monitoring
• Evap System (Mode $8)
• Vehicle Information

3.3 Read Codes

Select [Read Codes] and press OK. If fault codes exist, they will be displayed.

3.4 Erase Codes

Select [Erase Codes] to clear emission-related diagnostic information.

3.5 I/M Readiness

Select [I/M Readiness] and press OK to view the readiness status.

3.6 Data Stream

Navigate to 'Data Stream' and press OK. The screen displays live data.

Graphical data can also be viewed.

3.7 Freeze Frame

When an emission-related fault occurs, the onboard computer records vehicle conditions as 'freeze data', a snapshot of operating conditions during the fault.

3.8 O2 Sensor Test

This function displays the results of the last O2 sensor tests performed by the ECU. For live readings, refer to the live sensor displays.

3.9 On-Board Monitoring

This function allows reading the results of on-board diagnostic monitoring tests for specific components or systems.

• Catalyst Monitor B1
• Sensor Heater B1 - S1
• Sensor Heater B1 - S2

3.10 Evap System

The EVAP system test function initiates a leak test for the vehicle's EVAP system. The tool sends a signal to the vehicle's onboard computer to start the test. Consult the vehicle's repair manual for specific procedures.

3.11 Vehicle Information

Select [Vehicle Information] and press OK to display vehicle details.

Car Battery Test Procedures

After entering the car battery test program, select 'Battery in Vehicle' or 'Out of Vehicle'.

Battery Test Out of Vehicle

Select the battery type and standard (e.g., Regular Flooded, AGM Flat Plate, GEL, EFB, Lithium; CCA, IEC, EN, DIN, CA, BCI, MCA, SAE, JIS). The test results will display SOH (State of Health) and SOC (State of Charge). Results can indicate 'Good Battery', 'Good, Recharge', 'Replace', 'Bad Cell, Replace', 'Recharge', or 'Retest'.

Battery Test In Vehicle

Options include 'Battery Test', 'Cranking Test', and 'Charging Test'.

• Battery Test: Check surface charge by turning lights on for 10 seconds, then off.
• Cranking Test: Turn off the engine, press Enter. Then start the engine. The test displays time, max voltage, and min voltage during cranking. A normal result is indicated.
• Charging Test: The test checks the charging system's output. Results indicate if charging is normal, or if there are issues like ripple voltage.

Battery Voltage Status:

Before Ignition:

After Ignition:

Note: If battery voltage remains low after driving, the battery may be damaged and require replacement, assuming the alternator is normal.

3.13 Motorcycle Battery Tester Menu

This menu allows checking battery status, including voltage, CCA, electronic resistance, nominal CCA, charge value, health value, and test results quickly. The 'Waveform' function displays voltage changes over time.

Waveform Analysis:

• Discharge Voltage: With ignition OFF and engine off for over 20 minutes, discharge voltage should be around 12V. Below 11V indicates difficulty starting, and consistently below 11V suggests battery aging and replacement.
• Cranking Voltage: During engine start, voltage drops. The minimum voltage is the cranking voltage (around 7.5-9.5V). Consistently below 7.5V indicates low battery capacity requiring replacement.
• Charging Voltage: With ignition ON and engine running, the alternator charges the battery, typically around 14V.

Battery Status based on Voltage (after ignition):

Review

Access the 'Review' function from the main menu to check past test results, including Datastream, Freeze Frame, Waveform, and Save Result.

DTC Lookup

Enter a DTC code (e.g., P0000) to get its definition. The input ranges are P, C, B, U for the first character, 0, 1, 2, 3 for the second, and 0 to F for the others.

Tool Setup

Configure settings such as Language, Unit of Measure, Beep, and Device self-test. Available languages include English, French, Spanish, German, Russian, Italian, Portuguese, Dutch, and Polish.

Help

Access help information, including Tool Information, About OBD, and About Datastream.

4. Print and Update

This function allows updating and printing the tool's software via a computer. You will need the scan tool, a PC with a USB port, and a USB cable.

Update Steps:

1. Download the application from www.konnwei.com.
2. Run uplink.exe on your computer (Mac OS and Linux are not supported).
3. Press and hold any button while plugging in the USB cable. Release the button when the tool displays "Update Mode".
4. Open the uplink software, click "Check Update". The update file will be downloaded from the internet and then updated to the scan tool.
5. Wait for the update to complete successfully.
6. Restart the scan tool to finalize the update.

5. Service Procedures

For any questions, contact your local store, dealer, or visit www.konnwei.com. If the tool needs to be returned for repair, contact your local dealer for further information.