TM 5-3805-296-23-2
0073
Table 1. 1278 Apron Lower Proportional Solenoid Diagnostic Codes Continued.
073
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 3. Test Chassis Wiring
1278-13 Apron Lower
Harness for High Resistance or
Solenoid Out of Calibration
Open.
Continued
1. Remove jumper wire from terminal
B and terminal C of connector
A-C12 (WP 0012, Figure 103).
2. Connect jumper wire between
terminal 6 and terminal 14
of connector J-C3
(WP 0012, Figure 101).
3. Disconnect connector J-C8
(WP 0012, Figure 100)
from connector W-C1
(WP 0012, Figure 99).
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to Test Step 4.
between connector J-C8
Resistance Greater Than 5.0 Ohms
terminal 4 and terminal 43
Replace chassis wiring harness
(WP 0012, Figure 100).
(WP 0305).
Proceed to Test Step 5.
Test Step 4. Test Main Cab Wiring
Harness for High Resistance or
Open.
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.
0073-22
