Armada 4WD V8-5.6L (VK56DE) Flex Fuel (2009)
Ignition Timing: Component Tests and General Diagnostics
Component Description
IGNITION SIGNAL
Component Description
IGNITION COIL and POWER TRANSISTOR
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary
circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.
Diagnosis Procedure
IGNITION SIGNAL
Diagnosis Procedure
1.CHECK ENGINE START
Turn ignition switch OFF, and restart engine.
Is engine running?
Yes or No
Yes (With CONSULT-III)-GO TO 2.
Yes (Without CONSULT-III)-GO TO 3.
No - GO TO 4.
2.CHECK OVERALL FUNCTION
With CONSULT-III
1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
2. Make sure that each circuit produces a momentary engine speed drop.
OK or NG
OK - INSPECTION END
NG - GO TO 10.
3.CHECK OVERALL FUNCTION
Without CONSULT-III
1. Let engine idle.
2. Read the voltage signal between ECM terminals 46, 60, 61, 62, 65, 79, 80, 81 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as shown below.