TM 5-3805-298-23-1
0049
Table 1. 91 Throttle Position Sensor Diagnostic Codes - Continued.
049
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
91-3 Throttle Position
Test Step 2. Test for Shorted Lower
Sensor Signal Voltage Is
Cab Wiring Harness.
1. Turn ignition switch and battery
Above Normal or the
disconnect switch to OFF position
Voltage Is Shorted High -
(TM 5-3805-298-10).
Continued
2. Remove right lower cab access
panels (WP 0347).
3. Disconnect connector C-C8
(WP 0012, Figure 14) from throttle
position sensor.
4. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
5. Using digital multimeter
Continuity - Replace lower cab wiring
(WP 0174), test for continuity
harness (WP 0291).
between connector C-C18
Proceed to Test Step 4.
(WP 0012, Figure 13) terminal 13
No Continuity - Proceed to Test Step 3.
and all other C-C18 terminals.
Test Step 3. Test for Shorted Engine
Wiring Harness.
1. Remove right engine access panel
(WP 0348).
2. Disconnect connector EN-C1
(WP 0012, Figure 11) from engine
ECM J1.
3. Using digital multimeter
Continuity - Replace engine wiring
(WP 0174), test for continuity
harness (WP 0299).
between connector EN-C1
Proceed to Test Step 4.
(WP 0012, Figure 11) terminal 53
No Continuity - Proceed to step 4.
and all other EN-C1 terminals.
4. Using digital multimeter
Continuity - Replace engine wiring
(WP 0174), test for continuity
harness (WP 0299).
between connector EN-C2
Proceed to Test Step 4.
(WP 0012, Figure 12) terminal 13
No Continuity - Replace engine ECM
and all other EN-C2 terminals.
(WP 0265).
Proceed to Test Step 4.
Test Step 4. Verify Malfunction Is
Resolved.
1. Ensure all wiring harness
connectors are connected.
2. Install right lower cab access
panels (WP 0347).
3. Install right engine access panel
(WP 0348).
0049-3