User Manual

LAUNCH

CReader Series English User’s Manual

5.3.7 ABS Bleeding (Only applies to CReader 7011F/9081)

This function allows you to perform various bi-directional tests to check the

operating conditions of Anti-lock Braking System (ABS).

1. When the ABS contains air, the ABS bleeding function must be performed to

bleed the brake system to restore ABS brake sensitivity.

2. If the ABS computer, ABS pump, brake master cylinder, brake cylinder, brake

line, or brake fluid is replaced, the ABS bleeding function must be performed to

bleed the ABS.

5.3.8 Gear Learning (Only applies to CReader 9081)

The crankshaft position sensor learns crankshaft tooth machining tolerance and

saves to the computer to more accurately diagnose engine misfires. If tooth

learning is not performed for a car equipped with Delphi engine, the MIL turns on

after the engine is started. The diagnostic device detects the DTC P1336 'tooth

not learned'. In this case, you must use the diagnostic device to perform tooth

learning for the car. After tooth learning is successful, the MIL turns off.

After the engine ECU, crankshaft position sensor, or crankshaft flywheel is

replaced, or the DTC 'tooth not learned' is present, tooth learning must be

performed.

5.3.9 IMMO Service (Only applies to CReader 9081)

An immobilizer is an anti-theft mechanism that prevents a vehicle’s engine from

starting unless the correct ignition key or other device is present. Most new

vehicles have an immobilizer as standard equipment. An important advantage of

this system is that it doesn’t require the car owner to activate it since it operates

automatically. An immobilizer is considered as providing much more effective

anti-theft protection than an audible alarm alone.

As an anti-theft device, an immobilizer disables one of the systems needed to

start a car’s engine, usually the ignition or the fuel supply. This is accomplished by

radio frequency identification between a transponder in the ignition key and a

device called a radio frequency reader in the steering column. When the key is

placed in the ignition, the transponder sends a signal with a unique identification

code to the reader, which relays it to a receiver in the vehicle’s computer control

module. If the code is correct, the computer allows the fuel supply and ignition

systems to operate and start the car. If the code is incorrect or absent, the

computer disables the system, and the car will be unable to start until the correct

key is placed in the ignition.

To prevent the car being used by unauthorized keys, the anti-theft key matching