Dodge Ram Truck 1500-2500-3500. Manual — part 1082
P0381-WAIT TO START LAMP INOPERATIVE
For the Engine circuit diagram (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CON-
TROL MODULE - SCHEMATIC - ELECTRICAL)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
The cluster sends a signal to the ECM that it has detected a failed wait to start lamp.
Possible Causes
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
WAIT-TO-START LIGHT BULB
WIRING/CONNECTOR PROBLEM
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
WAIT-TO-START LAMP DOES NOT COME ON
Turn the ignition off.
While watching the wait-to-start lamp, turn the ignition key on.
Did the wait-to-start lamp light?
Yes
>> Go To 2
No
>> Go To 3
2.
WAIT-TO-START LAMP STAYS ON ALL THE TIME
Turn the ignition off.
While watching the wait-to-start lamp, turn the ignition key on.
Does the wait-to-start lamp stay on all the time?
Yes
>> Go To 3
No
>> Wait-to-start Lamp operating normally. Test passed.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
9 - 1250
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0381-WAIT TO START LAMP INOPERATIVE (CONTINUED)
3.
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
Turn the ignition off.
Remove the cluster.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
Using a 12-Volt test Light, check the Fused Ignition Switch Run/Start
circuit.
Is the light illuminated and bright?
Yes
>> Go To 4
No
>> Repair the open fused Ignition Switch Output circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
4.
WAIT-TO-START LIGHT BULB
Remove and inspect the Wait-to-Start Bulb.
Is the Bulb Ok?
Yes
>> Test complete.
No
>> Replace the Wait-to-Start Bulb.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1251
P0461-Fuel Level Unit No Change Over Time
9 - 1252
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0461-Fuel Level Unit No Change Over Time (CONTINUED)
For the Engine circuit diagram (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CON-
TROL MODULE - SCHEMATIC - ELECTRICAL)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
While the engine is running.
•
Set Condition:
Fuel level does not change by a calibrated amount over a calibrated amount of time.
Possible Causes
EXTERNAL DAMAGE TO FUEL TANK
FUEL LEVEL SENSOR
INSIDE OF FUEL TANK OBSTRUCTED DAMAGED
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
EXTERNAL DAMAGE TO FUEL TANK
Visually inspect the fuel tank for external damage.
Is the fuel tank damaged from the outside?
Yes
>> Fix or replace the fuel tank.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Go To 2
2.
FUEL LEVEL SENSOR
Disconnect the wiring harness from the fuel level sensor.
NOTE: Check connectors - Clean/repair as necessary.
Remove the fuel level sensor from the fuel tank.
Does the fuel level float move freely?
Yes
>> Go To 3
No
>> Replace the fuel level sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1253
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