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
Test Step 4. Test for Shorted Engine
91-4 Throttle Position
Wiring Harness.
Sensor Signal Voltage Is
1. Remove right engine access panel
Below Normal or the Voltage
(WP 0348).
Is Shorted Low - Continued
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 5.
(WP 0012, Figure 11) terminal 53
No Continuity - Proceed to step 4.
and terminal 33.
4. Using digital multimeter
Continuity - Replace engine wiring
(WP 0174), test for continuity
harness (WP 0299).
between connector EN-C1
Proceed to Test Step 5.
(WP 0012, Figure 11) terminal 53
No Continuity - Replace engine ECM
and ground.
(WP 0265).
Proceed to Test Step 5.
Test Step 5. 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).
4. At MSD, check for active
Diagnostic Code 91-4 Throttle
diagnostic codes (WP 0008).
Position Sensor Signal Voltage Is
Below Normal Becomes Inactive -
Troubleshooting complete.
Diagnostic Code 91-4 Throttle
Position Sensor Signal Voltage Is
Below Normal Remains Active -
Repeat troubleshooting from the
beginning.
0049-6