Ignition
90-8M0050731 MAY 2011 Page 2A-19
Ignition Coil Resistance Test
Remove the ignition coils from the electrical plate. Refer to Ignition Coil Removal.
Black Meter Lead
Red Meter
Lead
Secondary
Tower
EST Pin A EST Pin B
Secondary
Low Pin C
Primary
Ground Pin D
Battery + Pin E
Secondary
Tower
X No Continuity No Continuity 2–8 megaohm No Continuity No Continuity
EST Pin A No Continuity X
8500–12000
ohm
No Continuity
29000–50000
ohm
11000–21000
ohm
EST Low Pin B No Continuity
8500–12000
ohm
X No Continuity
39000–51000
ohm
21000–31000
ohm
Secondary Low
Pin C
No Continuity No Continuity No Continuity X No Continuity No Continuity
Primary Ground
Pin D
No Continuity
20000–50000
ohm
31000–51000
ohm
No Continuity X
13000–23000
ohm
Battery + Pin E No Continuity
11000–21000
ohm
21000–31000
ohm
No Continuity
13000–23000
ohm
X
EST = Electronic spark trigger
EST Low = Return ground path for the trigger signal to the ECM
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