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
3. Start engine (TM 5-3805-298-10).
Diagnostic Code 1797-3 Fuel Rail
1797-3 Fuel Rail Pressure
Using MSD, check for active
Pressure Sensor Signal Voltage Is
Sensor Signal Voltage Is
diagnostic codes (WP 0008).
Above Normal Becomes Inactive -
Above Normal or the Voltage
Troubleshooting complete.
Is Shorted High - Continued
Diagnostic Code 1797-3 Fuel Rail
Pressure Sensor Signal Voltage Is
Above Normal Remains Active -
Repeat troubleshooting from the
beginning.
NOTE
1797-4 Fuel Rail Pressure
Sensor Signal Voltage Is
Always inspect wiring harness connectors that are involved in the circuit.
Below Normal or the Voltage
Poor connections can often be the cause of a problem in an electrical
Is Shorted Low
circuit. Verify that all connections in the circuit are clean and secure and
that all connections are in good condition. If a problem with the
connection is found, correct the problem and verify that this malfunction
or diagnostic code is active before performing this procedure.
Perform open or short-circuit test at each wiring harness connection to
identify the correct wiring harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Engine ECM detects signal voltage from the fuel rail pressure sensor is less than
0.2 Volts DC for 0.6 seconds.
POSSIBLE CAUSE
Engine control wiring harness is shorted to ground.
Fuel rail pressure sensor is shorted.
Engine ECM.
Test Step 1. Check for Active
Diagnostic Codes.
1. Connect MSD and select C6.6 924
2. Start engine or attempt to start
Diagnostic Code 1797-4 Active -
engine (TM 5-3805-298-10) while
Proceed to step 3.
using MSD to check for active
Diagnostic Code 1797-4 Not Active -
diagnostic codes (WP 0008).
Troubleshooting is complete.
3. Using MSD (WP 0008) check for
Diagnostic Code 262-3 or 262-4
active diagnostic code 262.
Active - Repair diagnostic code 262
first (WP 0005).
Diagnostic Code 262-3 or 262-4 Not
Active - Proceed to Test Step 2.
