TM 5-3805-296-23-2
0089
Table 1. 1631 Brake Air Supply Solenoid Valve Diagnostic Codes Continued.
089
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
3. At MSD, check for active
1631-5 Brake Air Supply Solenoid
1631-05 Brake Air Supply
diagnostic codes (WP 0008).
Current Below Normal Becomes
Solenoid Current Below
Inactive Troubleshooting complete.
Normal Continued
1631-5 Brake Air Supply Solenoid
Current Below Normal Remains
Active Repeat troubleshooting from
the beginning.
NOTE
1631-06 Brake Air Supply
Solenoid Current Above
Always inspect harness connectors that are involved in the circuit. Poor
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 Above Normal Current on Air Governor
Solenoid Circuit K901.
POSSIBLE CAUSE
Main Cab Wiring Harness Shorted.
Brake Air Supply Solenoid.
Transmission/Chassis ECM.
Test Step 1. Test for Shorted Brake
Air Supply Solenoid.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Disconnect connector W-C26
(WP 0012, Figure 73) from brake
air supply solenoid connector
(WP 0012, Figure 72).
3. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
4. At MSD, check for active
1631-5 Brake Air Supply Solenoid
diagnostic code 1631-6 Brake Air
Current Below Normal Becomes
Active Replace brake air supply
Normal (WP 0008).
solenoid (WP 0356).
Proceed to Test Step 3.
1631-6 Brake Air Supply Solenoid
Current Above Normal Remains
Active Proceed to Test Step 2.
0089-5