TM 5-3805-298-23-1
0087
Table 1. 291 Demand Fan Solenoid Diagnostic Codes - Continued.
087
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
5. Using MSD, check for active
Diagnostic Code 291-5 Demand Fan
291-6 Demand Fan Solenoid
diagnostic codes (WP 0008).
Solenoid Current Below Normal
Current Above Normal -
Becomes Active - Replace demand
Continued
fan solenoid (WP 0234).
Proceed to Test Step 5.
Diagnostic Code 291-6 Demand Fan
Solenoid Current Above Normal
Remains Active - Proceed to Test
Step 3.
Test Step 3. Test for Shorted Rear
Frame Wiring Harness.
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).
3. Disconnect connector M-C1
(WP 0012, Figure 57) from
connector C-C20 (WP 0012,
Figure 56).
4. Using digital multimeter
Continuity - Replace rear frame wiring
(WP 0174), test for continuity
harness (WP 0295).
between connector M-C1
Proceed to Test Step 5.
(WP 0012, Figure 57) terminal 4
No Continuity - Proceed to step 5.
and terminal 10.
5. Using digital multimeter
Continuity - Replace rear frame wiring
(WP 0174), test for continuity
harness (WP 0295).
between connector M-C1
Proceed to Test Step 5.
(WP 0012, Figure 57) terminal 4
No Continuity - Proceed to Test Step 4.
and ground.
Test Step 4. Test for Shorted Lower
Cab Wiring Harness.
1. Remove left lower cab access
panels (WP 0347).
2. Remove transmission ECM cover
(WP 0266).
3. Disconnect connector C-C12
(WP 0012, Figure 26) from
Transmission ECM J1.
4. Using digital multimeter
Continuity - Replace lower cab wiring
(WP 0174), test for continuity
harness (WP 0291).
between connector C-C12
Proceed to Test Step 5.
(WP 0012, Figure 26) terminal 67
No Continuity - Proceed to step 5.
and terminal 54.
0087-7
