TM 5-3805-298-23-1
0052
Table 1. 168 Electrical System Voltage Diagnostic Codes - Continued.
052
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
168-1 Electrical System
Test Step 11. Verify Malfunction Is
Voltage Low - Continued
Resolved.
1. Ensure all wiring harness
connectors are connected.
2. Start engine (TM 5-3805-298-10).
Diagnostic Code 168-1 Electrical
Using MSD, check for active
System Voltage Low Becomes
diagnostic codes (WP 0008).
Inactive Troubleshooting complete.
Diagnostic Code 168-1 Electrical
System Voltage Low Remains Active
Repeat troubleshooting from the
beginning.
NOTE
168-2 Electrical System
Voltage Erratic, Intermittent,
Always inspect wiring harness connectors that are involved in the circuit.
or Incorrect
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 erratic battery voltage on battery circuits 150.
POSSIBLE CAUSE
Battery or batteries.
Charging system.
Engine wiring harness high resistance or open.
Lower cab wiring harness high resistance.
Fuse panel.
Ground connection.
Engine ECM.
Test Step 1. Test Batteries.
1. Connect MSD. Select C6.6 924,
Diagnostic Code 168-2 Electrical
start engine (TM 5-3805-298-10),
System Voltage High Is Not Active -
and check for active diagnostic
Troubleshooting is complete.
codes (WP 0008).
Diagnostic Code 168-2 Electrical
System Voltage High Remains
Active - Proceed to step 2.
