Test Step 5. Check the Engine Harness

143

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 5. Check the Engine Harness.

g00724122

Illustration 23

Engine harness connector P2

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

Expected Result:

Each resistance measurement is more than 20

B. Disconnect ECM engine harness connector

Ohms.

J2/P2. Verify that all of the +5 V engine pressure

sensors that are attached to the ECM engine

harness connector are disconnected.

Results:

Boost pressure sensor J200/P200

OK The +5 V line is not shorted in the engine

harness. Ensure that the engine harness is

Engine oil pressure sensor J201/P201

connected to the ECM and that all of the sensors

are reconnected. There does not appear to

Atmospheric pressure sensor J203/P203

be a problem at this time. Clear all diagnostic

codes. Continue to troubleshoot until the original

Injection actuation pressure sensor J204/P204

condition is resolved. STOP.

Not OK The engine harness has a short circuit.

C. Set a multimeter in order to measure the

resistance on the range that is close to 20 Ohms,

but not less than 20 Ohms.

Repair: Perform the following repair:

a. Measure the resistance from the ECM engine

1. Replace the engine harness.

harness connector P2 terminal 2 (+5 V engine

pressure sensor) to each of the following

2. Clear all logged diagnostic codes.

terminals:

3. Verify that the repair eliminates the problem.

P2 terminal 14 (atmospheric pressure

signal)

STOP.

P2 terminal 24 (oil pressure signal)

i01622115

Accelerator Pedal (Throttle)

P2 terminal 27 (injection actuation pressure

signal)

Position Sensor Circuit - Test

P2 terminal 40 (boost pressure signal)

SMCS Code: 1913-081

P2 terminal 3 (engine pressure sensor

System Operation Description:

common)

Use this procedure under the following situation:

P2 terminal 65 (battery negative)

Use this procedure if any of the following diagnostic

Refer to Illustration 23.

codes are indicated:

b. Wiggle the harness during the measurement

91-08 Invalid Throttle Signal (32)

in order to reveal any intermittent short

condition.