Hanatech MULTISCAN P2 User Manual page 52

USER MANUAL
B. DTC Erase (Clear fault code)
1. Pulse signal type
a. Pulse signal type does not support bi-directional serial communication,
therefore, a scanner is unable to send a command to the control module
to erase the DTC information from memory.
These old cars require you to remove battery terminal to clean up
diagnostic information from control module memory.
Removing the battery terminal will get rid of all information contained in
the car stereo and other electronic devices. And it may not effectively
erase the fault codes in some cars. Refer to the original repair manual
for further information.
Check if DTC information is properly removed by reading the trouble
code again after erasing the code.
2. Serial communication type
a. MULTISCAN P2 sends a command to the control module to erase DTC
information stored in memory, and the control module replies thereupon.
b. Check if DTC information is properly removed by reading the trouble
code again after erasing the code
For MULTISCAN P2
Chapter 4 - 4