Ignition Coil and Ignition Power Transistor
IGNITION COIL AND IGNITION POWER TRANSISTORRequired Special Tool:
MB991348: Test Harness Set
Measurement Method
1. Disconnect the ignition power transistor connector, and connect test harness special tool, MB991348, in between. (All terminals should be connected.)
2. Connect the analyzer special patterns pickup to each ignition power transistor connector terminal to analyze each cylinder:
- Terminal number 1 for the number 3 and 6 cylinders
- Terminal number 2 for the number 2 and 5 cylinders
- Terminal number 3 for the number 1 and 4 cylinders
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to PCM terminal 11. (When checking the number 1 and 4 cylinders.)
2. Connect the analyzer special patterns pickup to PCM terminal 12. (When checking the number 3 and 6 cylinders.)
3. Connect the analyzer special patterns pickup to PCM terminal 13. (When checking the number 2 and 5 cylinders.)
Standard Wave Pattern
Standard Wave Pattern:
Observation conditions
Standard Wave Pattern
Wave Pattern Observation Points
Point: Condition of wave pattern build-up section and maximum voltage (Refer to abnormal wave pattern examples 1 and 2.)