TM 5-3805-296-23-2
0089
Table 1. 1631 Brake Air Supply Solenoid Valve Diagnostic Codes.
0089
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
1631-03 Brake Air Supply
Solenoid Voltage 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 Voltage on Air Governor
Solenoid Circuit K901.
POSSIBLE CAUSE
Main Cab Wiring Harness Shorted.
Transmission/Chassis ECM.
Test Step 1. Test for Shorted Main
Cab Wiring Harness.
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. Disconnect connector W-C13
(WP 0012, Figure 89) from
transmission/chassis ECM.
4. Disconnect connector W-C12
(WP 0012, Figure 88) from
transmission/chassis ECM.
5. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C13
Proceed to Test Step 2.
terminal 17 (WP 0012, Figure 89)
No Continuity Proceed to step 6.
and all other terminals in
connector W-C13 (WP 0012,
Figure 89).
6. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C13
Proceed to Test Step 2.
terminal 17 (WP 0012, Figure 89)
No Continuity Replace transmission/
and all terminals in connector
chassis ECM (WP 0495).
W-C12 (WP 0012, Figure 88).
Proceed to Test Step 2.
