Table 1. Transmission Code (0573-03 to 0967-09) Troubleshooting Procedures - Continued.
CDI FMI CODE
TEST OR INSPECTION
0622-04 Upshift Switch Volt-
age Below Normal
ECM will log a diagnostic code.
N OT E
Always inspect the harness connectorsthat are involved in the circuit.
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 a con-
nection is found, correct the problem and verify that this diagnostic code
is Active before performing this procedure.
Perform open or short circuit test ateach harness connection to identify
correct harness to replace.
Perform this test only if condition is active.
Test Step 1. Verify if Code 0622-04
1. Connect MSD (WP 0006). Select 0622-04 Code Active - Proceed to
Implement 120M and verify 0622- Test Step 2.
04 is active.
0622-04 Code Not Active - Trouble-
Test Step 2. Test Upshift Switch Cir-
1. Turn ignition switch and battery
disconnect switch to the OFF
position (TM 5-3805-293-10).
2. Disconnect harness connector
from transmission ECM J2 (WP
N OT E
Harness connector is located behind cab bulkhead cover on right rear
3. Remove rear bulkhead cover
plate (WP 0266).
4. Disconnect rear chassis wiring
harness connector FA-C22 (WP
0009, Figure 47) from cab lower
wiring harness connector P-C69