Service Brake Pedal Position (Switch 2) Circuit

385

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 7. Insert a Jumper at the

No The problem is in the vehicle wiring between

Bulkhead Connector.

the bulkhead connector and the ECM.

Table 193

Repair: Perform the following repair:

Table for Status of the Service Brake Pedal

Inspect the vehicle wiring and repair the vehicle

Position (Switch 1)

wiring, as required. If the problem still exists with

Switch Position or

the wiring, send the vehicle to the OEM dealer.

Switch Status

Circuit

Pedal Position

STOP.

Service Brake Pedal

Open

Position Switch 1 Wire is

Disconnected.

i01858135

Service Brake Pedal

Service Brake Pedal Position

OFF

Shorted

Position Switch 1 Wire

Connected.

(Switch 2) Circuit - Test

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

SMCS Code: 1900-081-ZS

B. Fabricate a jumper wire 100 mm (4 inch) long.

System Operation Description:

Crimp a Deutsch Pin to each end of the wires.

Use this procedure under the following situation:

C. Find the switch for the terminal for the Service

Brake Pedal Position (Switch 1). Also find the

Use this procedure to determine if the Service

terminal for the sensor common for the AP

Brake Pedal Position (Switch 2) is preventing normal

Sensor/Switch in the engine side of the bulkhead

operation of cruise control, fast idle, idle set speed,

connector for the vehicle harness.

or PTO operation:

D. Insert the jumper wire between the two terminals

The following switch circuits can also prevent the

in the engine side of the bulkhead connector.

correct operation of the cruise control, fast idle, idle

set speed or PTO operation:

E. Turn the ignition key switch to the ON position.

Service brake pedal position (switch 1)

F. Connect the electronic service tool to the cab

data link connector.

Neutral switch

G. Access the electronic service tool status screen.

Cruise control set/resume switch

H. While the switch status is being monitored

Cruise control on/off switch

on the electronic service tool status screen

alternately remove the jumper wire between the

PTO on/off switch

two terminals, and alternately insert the jumper

wire between the two terminals.

Cruise control pause switch

Refer to Table 193.

The switches are described in the respective circuit

tests in Troubleshooting.

Expected Result:

All of the following Customer Programmable

The switch status changes per the information in

Parameters can affect cruise control, idle set speed,

Table 193.

fast idle, and PTO operation:

Results:

"Low Cruise Control Speed Set Limit"

Yes The problem is in the vehicle wiring

"High Cruise Control Speed Set Limit"

between the bulkhead connector and the switch.

"Idle Vehicle Speed Limit"

Repair: Perform the following repair:

"Fast Idle RPM #1"

Inspect the vehicle wiring and repair the vehicle

wiring, as required. If the problem still exists with

"Fast Idle RPM #2"

the wiring, send the vehicle to the OEM dealer.

"Cruise/Idle/PTO Switch Configuration"

STOP.