Test Reading Charts

POINTS TO REMEMBER

- The measurements must be performed using a Breakout Box (BOB) connected between the ECM and the ECM's connector.

- Several voltage levels must be regarded as guide values. Use common sense in assessing whether a measured value is correct or incorrect.

- If any measured value is incorrect, use the electrical diagram to establish which leads, connectors or components should be checked more closely.

- The references in the tables relate to the description of the operation of the relevant signal and to the fault diagnosis instructions with a full description of the diagnostic procedure to be followed.

- All the measured values apply to a warmed up engine.

- Unless otherwise stated, the ignition must be switched ON.

- Indicated measured values relate to calibrated FLUKE 88/97.

Trionic ECM Connector:

ECM Connector
>=greater than
<=less than
~=AC voltage
LP=Logic probe
P=Selected pulse
p=Visible pulses





ECM Pins 1 - 9





ECM Pins 10 - 24





ECM Pins 25 - 38





ECM Pins 39 - 55





ECM Pins 56 - 70