Illustration 185 Schematic for an Electronic vehicle speed source and a speedometer

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TM 9-2320-312-24-2

Troubleshooting Section

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Illustration 185

Schematic for an Electronic vehicle speed source and a speedometer

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Illustration 186

Terminal locations for ECM

Test Step 1. Inspect Electrical Connectors

Refer to Illustration 186.

and Wiring.

C. Check the ECM connector (allen head screw) for

the proper torque of 6.0 Nm (55 lb in).

A. Thoroughly inspect ECM vehicle harness

connector J1/P1, the firewall bulkhead connector

D. Check the harness and wiring for abrasion and

and the terminals for vehicle speed (terminals

pinch points from the sensor to the ECM.

32 and 33) in the connectors. Refer to

Troubleshooting, "Electrical Connectors -

Inspect" for details.

B. Perform a 45 N (10 lb) pull test on each of the

wires in the ECM connector that are associated

with the vehicle speed sensor.