Test Step 3. Measure the Sensor Resistance Through the Engine Harness

257

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 3. Measure the Sensor

Resistance Through the Engine Harness

g00864786

Illustration 93

Terminal locations for ECM connector P2

D. Ensure that the latch tab on the connector is

A. Turn the ignition key switch to the OFF position.

properly latched and ensure that the latch tab is

fully latched.

B. Thoroughly inspect ECM vehicle harness

connector J2/P2. Refer to Troubleshooting,

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

"Electrical Connectors - Inspect" for details.

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

C. Perform a 45 N (10 lb) pull test on the following

F. Repair the harness or repair the connector if a

wires in the ECM engine harness connector P2

problem is found.

that are associated with the engine speed/timing

sensors:

G. Ensure that the wiring harness is correctly routed

P2:48

and secured at the proper locations.

P2:49

H. Ensure that the harness wiring is not pulled

too tightly. When the harness wiring is pulled

P2:58

too tightly, vibrations or movement can cause

intermittent connections.

P2:59

I. Inspect the harness wiring for nicks and

abrasions.

Refer to Illustration 93.

J. If the harness and the connector are OK,

disconnect ECM connector J2/P2.