1989 Ski-Doo Repair Manual, Page 403Get this manual
Section 04 ELECTRICAL Sub-section 06 (TESTING PROCEDURE)
USE OF NIPPONDENSO CDI CHECKER
CDI module diode test (253,377,467,503,536,583 engine type)
The ignition module includes the diode which controls the output of the generating coil according to tho engine speed This checker can diagnose this diodeThe result will be indicated on the LED level indicator
Spark test
Uses the ignition coil on vehicle to test the high tension circuit
NOTE: This checker cannot check the lighting coil output
For lighting coil test, rofer to the Bombardier ignition tester procedure
BEFORE TESTING