Code 23, 35, 54 Power Transistor Circuit
NOTE:
See appropriate WIRING DIAGRAM in WIRING DIAGRAMS section for terminal and connector identification.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- This step checks continuity of power transistor power circuit. Check continuity of ground at ECM terminal No. 13.
- Inspecting power transistor:
- Disconnect coil wire at distributor.
- Attach Spark Tester (J-125) or equivalent to free end of coil wire.
- Remove power transistor from bottom of intake manifold, and disconnect harness connector.
- Connect a 2-wire jumper lead between power transistor connector and power transistor. In one wire of jumper lead install a 1.5-volt dry cell battery with negative side of battery facing power transistor.
- Ground power transistor to frame and turn ignition on.
- Disconnect and reconnect jumper lead at power transistor connector. Verify spark exists at spark tester. If spark is not present, replace power transistor.