TM 5-3805-298-23-1
0110
Table 1. 1401 Solenoid Valve 1 (Forward Low) Diagnostic Codes - Continued.
0110
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
5. Apply and hold service brake, start
1401-3 Solenoid Valve 1
Diagnostic Code 1401-3 Solenoid
engine, and shift transmission into
(Forward Low) Voltage Is
Valve 1 (Forward Low) Voltage Is
first gear forward (TM 5-3805-298-
Above Normal - Continued
Above Normal Becomes Inactive
10). Using MSD, check for active
Troubleshooting complete.
diagnostic codes (WP 0008).
Diagnostic Code 1401-3 Solenoid
Valve 1 (Forward Low) Voltage Is
Above Normal Remains Active
Repeat troubleshooting from the
beginning.
NOTE
1401-5 Solenoid Valve 1
(Forward Low) Current
Always inspect wiring harness connectors that are involved in the circuit.
Below Normal
Poor 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 wiring harness connection to
identify the correct wiring harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Transmission ECM detects an open circuit or low current condition in the solenoid
valve 1 (forward low) circuit.
POSSIBLE CAUSE
Transmission wiring harness high resistance or open.
Lower cab wiring harness high resistance or open.
Solenoid valve 1 (forward low) faulty.
Transmission ECM.
Test Step 1. Check for Active
Diagnostic Codes.
Connect MSD (WP 0008), select
Diagnostic Code 1401-5 Active -
Transmission 924H. Apply and hold
Proceed to Test Step 2.
service brake, start engine, and shift
Diagnostic Code 1401-5 Not Active -
transmission into first gear forward
Troubleshooting is complete.
(TM 5-3805-298-10). Using MSD,
check for active diagnostic codes
Test Step 2. Test for Faulty Solenoid
Valve 1 (Forward Low).
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
