TM 5-3805-296-23-1
0021
Table 1. 0094 Fuel Pressure Sensor Diagnostic Codes.
0021
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
0094-03 Fuel Pressure
Sensor Voltage Above
Always inspect harness connectors that are involved in the circuit. Poor
Normal
connections can often be the cause of a problem in an electrical 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 harness connection to identify
the correct harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active with engine running.
DIAGNOSTIC CODE SET CONDITION
Engine ECM Detects Above Normal Voltage on Fuel Pressure Sensor Signal
Circuit C991.
POSSIBLE CAUSE
Fuel Filter Wiring Harness High Resistance, Open, or Shorted.
Engine Interface Wiring Harness High Resistance, Open, or Shorted.
Basic Engine Wring Harness High Resistance, Open, or Shorted.
Fuel Pressure Sensor.
Engine ECM.
Test Step 1. Test Sensor 5-Volt and
Ground Circuit Function.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Disconnect connector AW-C1
(WP 0012, Figure 36) from fuel
pressure sensor connector
(WP 0012, Figure 35).
3. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
4. Using digital multimeter
Voltage Less Than 4.5 V Proceed to
(WP 0540), test for voltage
Test Step 2.
between connector AW-C1
Voltage 5.0 0.5 V Proceed to Test
terminal 1 and terminal 2
Step 5.
(WP 0012, Figure 36).