This OBD Link Connector (OLC) performs several tasks:
1. Test OBD2 port before plug in scan tool
2. Monitor voltage during ECU reflash programming
3. Detect communication protocol and monitor data stream
4. Function as Break Out Box (Example: For resetting of blink code during diagnosis)
5. Check Alternator charging conditions
6. As data saver while replacing car battery
7. As DC power source for other devices that need external power (up to 5 amps.)
performs tests on each and every 16 pins of OBD2 port for abnormality caused by
shorting or reverse polarity with ignition key is OFF, ON and engine running to
avoid damage to your scan tool prior plugged in.
voltmeter displays voltage input with alarm
Beeps one at a time for 30 seconds if voltage
falls below 11.8V (for 12V system) or Beeps twice at a time for 30
seconds if the voltage is below 23.8V (for 24V system)
LED will blink slow, steady and fast to indicate whenever there is voltage (positive
or negative) detected at any particular pin and triggers the OLC "Voltage
Present or the OTM Check LED" to illuminate as a warning. If there is a reverse
polarity occurred, the green LEDs at pin 4 (Chassis) and pin 5 (Signal) ground
turns into red colour.
/ Caution LED
the testing of the OBD2 port, where there are no abnormal activities, the green
OK LED will light up. This indicates everything is OK and it is ready for
Scan tool to be plugged in
Caution Voltage present LED stays ON, do
not plug your Scan tool. Check and compare the OBD2 circuit connection with
vehicle Repair Manual for the reason of shorting. Or check the charging volts
to determine whether the regulator is functioning properly.
2. Monitor voltage
during reflash programming
It monitors voltage constantly
during reflash programming due to prolong time and power consumption. There
will be an alarm warning when the battery falls below 11.8V or higher than
15.2V (for 12 V System) or below 23.8V or higher than 29.2V (for 24V system).
This feature will minimize any error
while performing service reflashes or coding.
Detect communication protocol
Detect which type of communication protocol
whether PWM (J1850), VPW (J1850), ISO 9141-2, DIS/ISO 14230-4 or Canbus
(J-2284).and monitor data stream being used when connecting the scan tool to
the car OBD2 ports via OBD Link connector (OLC)
OBD Link Connector LEDs allows you to
keep taps on power and ground. It identifies the protocol used in the vehicle.
RED LEDs (Pin 16) - automatically
turn-on as soon as you plugged into DLC. RED LEDs turn dim when:
Low battery voltage - refer to Voltmeter and alarm will beep
(below 11.8V for 12V system and 23.8V for 24V system). Wiring to DLC pin 16 is
faulty. Grounds circuits have resistance issues.
GREEN LEDs (Pins 4 -Chassis and 5 - Signal) - automatically turn-on as soon as you plugged into
DLC. Ground LED (Pin 5) is connected to battery voltage via ECU. Therefore, a
ground supply on pin 4 will not affect LED 5. A dim single green LED will
indicate a circuit problem with the corresponding circuit. In remote case where
if there is reverse polarity; the Green LED will turn into RED colour. When
this happens, check the vehicle DLC connector for wrong polarity. Rectify first
and test again.
BLUE LEDs (Pins 2, 6, 7, 10, 14 and
15) - LEDs should flash when serial data voltage pulses are present in the data
Blue LEDs is assigned on pins 2, 6, 7, 10, 14 and 15 to indicate
communication with scan tool or interface and for communication protocol
identification. It will turn-on depend on your vehicle model. For some vehicle
model, one or multiple blue LEDs will turn-on as soon as the OBD Link Connector
is connected and you start the ignition. The brightness of the LEDs depends on
the nature of the signal it's pursuing. This OBD Link Connector can identify
immediately the protocol used. The better way to identify the protocol in use
is to set-up the scan tool or interface in to LIVE DATA. This will lead in a
constant data stream between the scan tool and the vehicle, and then you can
locate the LEDs that are flashing.
YELLOW LEDs (Pins 1,
3, 8, 9, 11, 12, and 13) - it should flash when your vehicle manufacturer use
either one on the pins for any function they prefer.
4.Function As Break
Link Connector (OLC) is a pass-through breakout box for the OBDII DLC
(diagnostic link connector). It can be connected to any OBD-II compatible
tools: such as scan tools, code readers, monitor readers or data loggers.
Any tool that uses a standard test lead or probe that use 4mm banana plugs
(including those with safety sheaths) can be plugged to OLC 16 pins sockets,
these include lab scopes, multimeter, logic probes, test lights, etc to
read the voltage, resistance, frequency, pulse width or duty cycle.
and Blink Code cables are standard items supplied.
for direct pin to pin or stacking connection while scanning or perform special
functions and tests.
Cable - N/O (Normally Open) contact switch cable for Reset, Adaptation or codes
VW - To protect the Scan tool such as
aftermarket radios on VW's BM - Transmitter Programming on some
GMs Honda - Set the ECM in SCS mode with
your scan tool connected Lexus - Help diagnose electronics
systems (Sirius, GPS) on pin 6 and 14 Bosch - Troubleshoot Bosch
controllers that short to ground Proton - needs to short pin 1 to
ground in order to access into OBD2 functions. Toyota Avanza - the base RPM can
only be achieved by shorting pin 4 and 12
Check Alternator condition
A quick Alternator charging check during
idling and high RPM conditions.
the engine, observe the voltage display while the engine is idling, rev engine
up to 3,000rpm without load and 2,000rpm with all electrical loads ON, to check
for loose drive belt, charging voltage and the faulty regulator.
As data saver while replacing car battery
As Power Backup for ECU (for saving data)
when connected to an external 12V battery while replacing the weak car battery.
The data-saver cable comes with
surge voltage protection, short circuit and polarity protection.