TM 5-3805-298-23-1
0105
Table 1. 793 Primary Steering Oil Pressure Switch Diagnostic Codes - Continued.
0105
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
4. Using MSD, check for active
Diagnostic Code 793-3 Primary
793-3 Primary Steering
diagnostic codes (WP 0008).
Steering Pressure Switch Voltage Is
Pressure Switch Voltage Is
Above Normal Becomes Inactive -
Above Normal - Continued
Troubleshooting complete.
Diagnostic Code 793-3 Primary
Steering Pressure Switch Voltage Is
Above Normal Remains Active -
Repeat troubleshooting from the
beginning.
NOTE
793-4 Primary Steering
Pressure Switch Voltage Is
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 that both primary steering pressure switch normally
open and normally closed inputs are shorted low.
POSSIBLE CAUSE
Primary steering pressure switch is faulty.
Transmission wiring harness is shorted to ground.
Lower cab wiring harness is shorted to ground.
Transmission ECM.
Test Step 1. Check for Active
Diagnostic Codes.
Connect MSD. Select Transmission
Diagnostic Code 793-4 Active -
Proceed to Test Step 2.
924H and check for active diagnostic
codes (WP 0008).
Diagnostic Code 793-4 Not Active -
Troubleshooting is complete.
Test Step 2. Test for Faulty Primary
Steering Pressure Switch.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove right lower cab access
panels (WP 0347).
