TM 5-3805-298-23-1
0065
Table 1. 1797 Fuel Rail Pressure Sensor Diagnostic Codes - Continued.
065
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 2. Test for Shorted Fuel
1797-4 Fuel Rail Pressure
Rail Pressure Sensor.
Sensor Signal Voltage Is
1. Turn ignition switch and battery
Below Normal or the Voltage
disconnect switch to OFF position
Is Shorted Low - Continued
(TM 5-3805-298-10).
2. Remove right engine access panel
(WP 0348).
3. Disconnect connector E-C2
(WP 0012, Figure 31) from fuel rail
pressure sensor.
4. Turn battery disconnect switch ON
and start engine (TM 5-3805-298-
10).
5. Using MSD, check for active
Diagnostic Code 1797-4 Fuel Rail
diagnostic codes (WP 0008).
Pressure Sensor Signal Voltage Is
Below Normal Remains Active -
Proceed to Test Step 3.
Diagnostic Code 1797-4 Fuel Rail
Pressure Sensor Signal Voltage Is
Below Normal Becomes Inactive -
Replace fuel rail pressure sensor
(WP 0244).
Proceed to Test Step 4.
Test Step 3. Test for Shorted Engine
Control Wiring Harness.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Disconnect connector E-C4
(WP 0012, Figure 10) from engine
ECM connector J2.
3. Using digital multimeter
Continuity - Replace engine control
(WP 0174), test for continuity
wiring harness (WP 0294).
between connector E-C4
Proceed to Test Step 4.
(WP 0012, Figure 10) terminal 51
No Continuity - Proceed to step 4.
and terminal 40.
4. Using digital multimeter
Continuity - Replace engine control
(WP 0174), test for continuity
wiring harness (WP 0294).
between connector E-C4
Proceed to Test Step 4.
(WP 0012, Figure 10) terminal 51
No Continuity - Replace engine ECM
and ground.
(WP 0265).
Proceed to Test Step 4.
0065-5