Table 1. 4 Fuel Injector 4 Diagnostic Codes - Continued.
CID FMI CODE
TEST OR INSPECTION
Test Step 4. Verify Malfunction Is
4-2 Fuel Injector 4 Data Is
Erratic, Intermittent, or
1. Ensure all wiring harness
Incorrect - Continued
connectors are connected.
2. Ensure valve cover (WP 0187) is
installed on engine.
3. Start engine or attempt to start
Diagnostic Code 4-2 Is Not Active -
engine (TM 5-3805-298-10). Using
MSD, check for active diagnostic
Diagnostic Code 4-2 Remains Active
- Repeat troubleshooting from the
4-5 Fuel Injector 4 Current
· Always inspect wiring harness connectors that are involved in the circuit.
Poor 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 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 abnormally low current on fuel injector 4.
· Engine control wiring harness high resistance or open.
· Injector cylinder 3 and 4 jumper harness high resistance or open.
· Fuel injector 4.
· Engine ECM.
Test Step 1. Check for Active
1. Connect MSD and select C6.6 924