Primary Coil And Ignition Power Transistor Continuity Check

Fig 1: Measuring Voltage Between Primary Coil And Ignition Power Transistor

Courtesy of DAIMLERCHRYSLER CORPORATION

NOTE: An analog-type ohmmeter should be used.

NOTE: Connect the negative probe of the ohmmeter to terminal 1.

CAUTION: This test must be performed quickly (in less than 10 seconds) to prevent coil from burning and ignition power transistor from breaking.

As described in the chart below, perform a continuity check on the ignition coil power transistor.

CONTINUITY CHART

1.5 V POWER SUPPLY BETWEEN 2 - 3	CONTINUITY BETWEEN 1 - 2
Current flowing	Yes
Current not flowing	No