CWS TROUBLESHOOTING PROCEDURES

TM 9-2320-303-24-1

COLLISION WARNING SYSTEM (CWS) TROUBLESHOOTING - CONTINUED

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CWS TROUBLESHOOTING PROCEDURES

NOTE

Perform Initial System Troubleshooting prior to replacing any component.

Asterisk (*) indicates step requiring Pro-link tester w/CTIS/CWS PC Card.

Table 2. CWS Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Red Fail Light on Driver's Display Unit or 1. While performing side sensor If OK, proceed to next step. If

Side

Sensor

Display

Illuminates

test, wave hand in front of side NOT OK, replace side sensor (WP

Continuously.

sensor and verify that correct 0220 00).

signal is received.*

2. Verify a 5-volt output at side If OK, replace CPU (WP 0220

sensor signal wire at side sensor 00). If NOT OK, replace side

connector, with a target sensor (WP 0220 00).

present.

Warnings Tones Not Audible.

1. Verify volume control knob is Turn volume control knob fully

turned fully clockwise.

clockwise.

2. Turn system off and back on. If tone is not heard, proceed to

Turn volume control knob and next step.

listen for tone.

3. Perform speaker test and verify If tone is not heard, proceed to

audible tone is heard from next step.

DDU speaker.*

4. Verify speed input.

If OK, proceed to next step. If

NOT OK, replace DDU (WP 0220

00).

5. Perform brake test and verify If OK, replace CPU (WP 0220

correct signal is received when 00). If NOT OK, replace DDU

brake pedal is depressed.*

(WP 0220 00).

Warning Tones Audible When Brakes Are 1. Perform brake test and confirm If OK, proceed to next step. If

Applied.

receipt of correct signal when NOT OK, replace DDU (WP 0220

brake pedal is depressed.*

00).

2. Verify brake mode setting is If OK, proceed to next step. If

correctly configured in CPU.* NOT OK, replace CPU (WP 0220

00).

3. Verify brake logic is correctly If OK, replace DDU (WP 0220

configured.*

00). If NOT OK, replace CPU

(WP 0220 00).

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