Test Step 2. Inspect Electrical Connectors and Wiring -807640571

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TM 9-2320-312-24-2

Troubleshooting Section

Test Step 2. Inspect Electrical Connectors

Expected Result:

and Wiring.

All connectors, pins and sockets should be

completely coupled and/or inserted and the harness

and wiring should be free of corrosion, abrasion

or pinch points.

Results:

OK Proceed to Test Step 3.

Not OK

Repair: Perform the following repair:

Repair the connectors or wiring and/or replace

the connectors or wiring. Ensure that all of the

seals are properly in place and ensure that the

connectors are completely coupled.

Verify that the repair eliminates the problem.

STOP.

Test Step 3. Check the Service Brake

Pedal Switch 2 Status on the Electronic

Service Tool.

Table 199

Table for Status of the Service Brake Pedal Position

Switch Position or

Status

Circuit

Pedal Position

The Service Brake Pedal

OFF

Open

is DEPRESSED.

The Service Brake Pedal

Closed

g00770850

is RELEASED.

Illustration 170

A. Thoroughly inspect ECM vehicle harness

A. Access the electronic service tool status screen.

connector J1/P1, the firewall bulkhead connector

and the terminal 64 (service brake pedal position

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

(switch 2)).

C. Start the engine. Ensure that the air system

Refer to Troubleshooting, "Electrical Connectors

is charged if the vehicle is equipped with air

- Inspect" for details.

brakes. Depress the service brake while the

status of the service brake pedal position (switch

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

2) is being observed. Also, release the service

wires in the ECM connector that are associated

brake while the status of the service brake pedal

with the switches.

position (switch 2) is being observed.

Refer to Illustration 170.

Refer to Table 199 for the status of the switch or

for the status of the pedal position.

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

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

Note: If the status indicates "Not Installed", check

the programming of the "Transmission Style". This

D. Check the harness and wiring for abrasion and

parameter must be programmed to "Automatic

pinch points from the sensor to the ECM.

Option 2", "Automatic Option 3", "AT/MT/HT Option

2", or "AT/MT/HT Option 3".