PIN 0776331 - Caterpillar

Illustration 1 g00714481
Schematic of the Solenoids
Illustration 2 g00581365
Location of the solenoids (1) Forward high solenoid (2) Reverse solenoid (3) Forward low solenoid (4) The Solenoid for Speed Clutch 1 (5) The Solenoid for Speed Clutch 2 (6) The Solenoid for Speed Clutch 3Use table 1 in order to determine the solenoids that are energized. Table 1 identifies the solenoids that are energized for each position on the shift lever.
Table 1
Information about the Solenoids    
Solenoid     Number of the Solenoid (1)     Number of the Contact    
Forward High (2)     1     31    
Reverse     2     32    
Forward Low (2)     3     33    
Speed Clutch 1     4     34    
Speed Clutch 2 (3)     5     35    
Speed Clutch 3 (3)     6     36    
Gear     Solenoid that is Energized    
Neutral     No solenoids are energized.    
Forward 1     3 and 4    
Forward 2     1 and 4    
Forward 3     3 and 5    
Forward 4     1 and 5    
Forward 5     1 and 6    
Reverse 1     2 and 4    
Reverse 2     2 and 5    
Reverse 3     2 and 6    
( 1 ) This number is used in order to identify the solenoids in the manual.
( 2 ) "Solenoid Group A"
( 3 ) "Solenoid Group B"This diagnostic code is associated with transmission solenoid 1.FMI 03 is recorded when the transmission electronic control module senses a short. The short is between the battery and the solenoid.Test Step 1. CHECK FOR A SHORT TO THE BATTERY.
Turn the key start switch to the OFF position.
Disconnect the machine harness from the control module.
Measure the continuity from contact 1 to contact 31.Turn the headlights on and off and turn the heater on and off during the test. This ensures that these circuits are not shorted to the output of the solenoid.Expected Result:There is continuity.Results:
YES - The solenoid harness has a short to the battery.Repair: Repair the harness or replace the harness. Stop.
NO - There is NOT continuity. The solenoid harness does not have a short to the battery. Proceed to test step 2.Test Step 2. CHECK FOR A SHORT TO OTHER SOLENOID'S OUTPUTS.
Verify that the key start switch is in the OFF position.
Disconnect the machine harness from the control module.
Measure the continuity from contact 31 to contact's for the other solenoid's outputs.Expected Result:There is continuity.Results:
YES - The solenoid harness has a short.Repair: Repair the harness or replace the harness. Stop.
NO - There is NOT continuity. The solenoid harness does not have a short. Inspect the harness connector and the contacts. Verify that the active diagnostic code is present. If the active diagnostic code is present the transmission electronic control module has failed.Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code is active. If the cause of the diagnostic code is not found, replace