TM 5-3805-296-23-2
0084
Table 1. 1429 Tractor System Air Pressure Sensor Diagnostic Codes Continued.
084
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
1429-04 Tractor System Air
Pressure Sensor Voltage
Always inspect harness connectors that are involved in the circuit. Poor
Below Normal
connections can often be the cause of a problem in an electrical circuit.
Verify that all connections in the circuit are clean and secure and that all
connections are in good condition. If a problem with the connection is
found, correct the problem and verify that this malfunction or diagnostic
code is active before performing this procedure.
Perform open or short-circuit test at each harness connection to identify
the correct harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Transmission/Chassis ECM Detects Below Normal Voltage on Trac/S Air Press
Sensor Circuit C465.
POSSIBLE CAUSE
Main Cab Wiring Harness Shorted.
Tractor Air Pressure Sensor.
Transmission/Chassis ECM.
Test Step 1.Test for Shorted Tractor
Air Pressure Sensor.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Disconnect connector W-C21
(WP 0012, Figure 75) from tractor
air pressure sensor connector
(WP 0012, Figure 74).
3. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
4. At MSD, check for active
1429-3 Tractor System Air Pressure
diagnostic code 1429-4 Tractor
Sensor Voltage Above Normal
System Air Pressure Sensor
Becomes Active Replace tractor air
Voltage Below Normal (WP 0008).
pressure sensor (WP 0521).
Proceed to Test Step 3.
1429-4 Tractor System Air Pressure
Sensor Voltage Below Normal
Remains Active Proceed to Test
Step 2.
Test Step 2. Test for Shorted Main
Cab Wiring Harness.
1. Disconnect connector W-C12
(WP 0012, Figure 88) from
transmission/chassis ECM.
0084-5
