TM 5-3805-296-23-2
0072
Table 1. 1277 Apron Raise Proportional Solenoid Diagnostic Codes Continued.
072
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 4. Test Main Cab Wiring
1277-13 Apron Raise
Harness for High Resistance or
Solenoid Out of Calibration
Open.
Continued
1. Remove jumper wire from
terminal 6 and terminal 14
of connector J-C3
(WP 0012, Figure 101).
2. Disconnect connector W-C12
(WP 0012, Figure 88) from
transmission/chassis ECM.
3. Connect jumper wire between
terminal 50 and terminal 59
of connector W-C12
(WP 0012, Figure 89).
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Replace Calibration Group 198-1758
between connector W-C1
(WP 0173).
terminal 4 and terminal 43
Proceed to Test Step 5.
(WP 0012, Figure 99).
Resistance Greater Than 5.0 Ohms
Replace main cab wiring harness
(WP 0505).
Proceed to Test Step 5.
Test Step 5. Perform Apron
Solenoids Calibration.
CAUTION
Failure to hold joystick in proper position during calibration will create
invalid test results.
Perform apron solenoids calibration
Calibration Successful
(WP 0173).
Troubleshooting complete.
Active Diagnostic Code Present
Diagnose and repair active code
(WP 0005).
Repeat troubleshooting from the
beginning.
Calibrating (never completes
process) Proceed to Test Step 6.
Calibration Value Too Low Replace
apron raise calibrate apron solenoid
(WP 0435).
Calibrate apron solenoids (WP 0173).
Calibration Value Too Large
Replace apron raise solenoid
(WP 0435).
Calibrate apron solenoids (WP 0173).
0072-19
