Mirage Sedan LS L4-1834cc 1.8L SOHC MFI (1999)
Ignition Power Transistor: Testing and Inspection
Component Control Inspection
IGNITION COIL AND IGNITION POWER TRANSISTOR
Ignition power transistor control signal
Measurement Method
1. Disconnect the ignition coil connector; and connect the special tool (test harness: MB991348) in between. (All terminals should be connected.)
2. Connect the analyzer special patterns pickup to ignition coil connector terminal 3.
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to ECM terminal 10 (No.1 - No.4), terminal 23 (No.2 - No.3) respectively.
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.)
Examples of Abnormal Wave Patterns
