With an Impulse Counter Scan Tool

Connect impulse counter scan tool according to connection diagram and follow the steps below. Impulse Counter Scan Tool

a) Ignition: ON
b) Press start button for 2 to 4 seconds.
c) Read and record DTC.
d) Press start button again.
e) Read and record DTC.

Repeat steps d) and e) until the first DTC reappears.

NOTE: DTC's which have been stored due to testing or disconnecting of lines must be erased from the DTC memory at the end of testing.