Ign Diagnosis - Using the Sun MCA, 1805-Z Interrogator

9223infiniti01

Models
1990-91 Q45

Section
Electrical System

Classification
EL91-003

Bulletin No.
ITB91-009

Date
March 7, 1991


IGNITION SYSTEM DIAGNOSIS USING THE SUN MCA & 1805-Z INTERROGATOR


APPLIED MODELS:
1990-91 Q45

SERVICE INFORMATION:

The following is application information for the SUN models "MCA and the 1805-Z "Interrogator." These procedures are adaptable for use on Q45 Infiniti vehicles.


WARRANTY INFORMATION:

Diagnostic time is included in all Infiniti warranty flat rate labor allowances. Separate labor operations should not be claimed for use of the equipment described in this Bulletin. Please refer to your Infiniti Warranty Flat Rate Manual for specific repair operations.





E.C.C.S. COMPONENT PARTS LOCATION





POWER TRANSISTOR UNIT & IGNITION COIL





IGNITION COIL & POWER TRANSISTOR RESISTANCE TESTING





RPMs AND TIMING PROCEDURES











M.C.A. & INTERROGATOR RPM AND TIMING PROCEDURE








SCOPE TESTING THE PRIMARY IGNITION SYSTEM











PATTERNS AT 1000 RPM











PATTERN AT 1500 RPM














PATTERN AT IDLE





INTERROGATOR PROCEDURE