Lull 944E-42 Service Manual User Manual download pdf (Page 696)

100

101

Electrical System

9.186

Model 644E-42/944E-42 Rev. 6/04

9.13.3 Throttle Position Sensor

(944E-42 Only)

The throttle position sensor (1) (944E-42 Only) controls

the engine speed. It is designed to sense the position of

the throttle pedal and sends the signal to the engine

control module.

The sensor is located on the bracket (2) below the dash

where the throttle pedal is attached.

The sensor must be tested while it is still on the vehicle.

a. Inspection and Replacement

1. Inspect the sensor terminals for continuity. Attach

the ohmmeter leads to the two outside pins, 1 (3)

and 3 (4). The resistance reading should be

approximately 4,000 - 6,000 ohms whether the

throttle pedal is at rest or fully depressed.

Attach the ohmmeter leads to pins 2 (5) and 3 (4).

The resistance reading should be approximately

2,000 ohms, with the throttle pedal at rest and

change to approximately 4,000 ohms, with the

throttle pedal fully depressed. (Refer to Section

9.8.27, “944E-42 Electronic Throttle Circuit &

Troubleshooting.”)

2. Replace the sensor if the resistance readings are not

as described in step 1.

b. Removal

1. Unlock and open the engine cover (6).

2. If the vehicle has dual batteries, disconnect both

negative battery cables (8 and 9) from both

batteries.

To access the lower battery (10), loosen the

knob (11) far enough so that the lip (12) on the upper

battery box clears the knob. Lift up the upper battery

box (13) and swing it out, so that the box clears the

hydraulic tank support bracket, to gain access to the

lower negative battery cable (8). Disconnect the

lower negative battery cable

3. Disconnect the ECM cab harness connector (14)

from the throttle position sensor (15).

MU5770

Front

4110390

OU0780

MU0650

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