CTIS Troubleshooting - TM-9-2320-386-24-1-10159

TM 9-2320-386-24-1-1

0019 00

CTIS Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 5. Reconnect pin 10 control harness to the ECU.

Step 6. Disconnect manifold power harness from manifold.

Step 7. Turn ignition ON.

Step 8. Using multimeter, measure the voltage from manifold power harness lead 27 to ground.

With the ignition ON, the voltage should be 24 volts. With the ignition OFF, the voltage

should be 0 volts.

Step 9. If the voltage reads 0 volts with the ignition ON, disconnect manifold power harness

from rear wiring harness and measure voltage across pins of rear wiring harness.

Step 10. If rear wiring harness has 24 volts present, turn ignition OFF. Notify DS maintenance.

Step 11. If 24 volts is not present on rear wiring harness, test rear wiring harness (WP 0011 00).

Step 12. Turn ignition OFF.

Step 13. Disconnect control harness (pin 10 harness) from ECU and manifold.

NOTE

It is left to the discretion of the technician as to whether the

ground lead is to be removed.

The ground lead is part of the harness shield and plays no

active part in the system operation.

Pin 5 of the control harness is plugged.

Step 14. Using the multimeter and extra long test leads, measure pin-for-pin continuity (i.e.,

pin 1 to pin 1, etc.), and measure pin-to-pin continuity (i.e. pin 1 to pin 2, etc.). If shorts

or broken wires are detected, notify DS maintenance.

Step 15. If the control harness is good, reconnect control harness to ECU and replace manifold

Step 16 If condition continues, perform malfunction 2, test 1 and malfunction 3, test 1.

END OF TESTING!

TIRE(S) WILL NOT MAINTAIN SELECTED PRESSURE

Step 1. Check for punctured or damaged tires. Repair tire(s) (WP 0175 00) or replace tire(s)

WARNING

Eyeshields must be worn when releasing compressed air.

Failure to do this may result in injury to personnel.

Do not disconnect air lines before draining air reservoirs.

Small parts under pressure may shoot out with high velocity,

causing injury to personnel.

Step 2. Check wheel valve by disconnecting hub side air tube. Listen for air escaping from

wheel valve. Repair wheel valve (WP 0177 00) or replace wheel valve (WP 0176 00) if

air is escaping.

Test 1. If condition persists, perform visual leak inspection.

Step 1. Turn ignition OFF.