Dodge Ram Truck 1500-2500-3500. Manual — part 1064
P0238-MAP SENSOR VOLTAGE TOO HIGH (CONTINUED)
7.
(F855) SENSOR RETURN CIRCUIT OPEN
Measure the resistance between the (K916) sensor return circuit in the
Map sensor harness connector with the (K916) sensor return circuit in
the ECM harness connector.
Is the resistance less than 10 Ohms?
Yes
>> Go To 8
No
>> Repair or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
8.
INTERMITTENT CONDITION
Reconnect the ECM harness connector.
Turn the ignition on.
While monitoring scan tool, connect a jumper wire between the (K37)
signal circuit of the sensor harness connector and the (K916) return
circuit of the sensor harness connector.
Does the scan tool show P0237-Map Sensor Voltage Too Low
DTC?
Yes
>> Refer to the INTERMITTENT CONDITION Symptom
(Diagnostic Procedure).
(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Replace and program the ECM in accordance with the
Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
9 - 1178
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0243-WASTEGATE PRESSURE CONTROL PWM
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1179
P0243-WASTEGATE PRESSURE CONTROL PWM (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:
When the ignition is on.
•
Set Condition:
The ECM detects an open or short circuit in the Wastegate solenoid circuit.
Possible Causes
DAMAGED WIRING HARNESS OR CONNECTORS
WASTEGATE SOLENOID
(F504) FUSED IGNITION SWITCH OUTPUT OPEN
(K139) WASTEGATE SOLENOID DRIVER CIRCUIT OPEN
(K139) WASTEGATE SOLENOID CIRCUIT SHORTED TO GROUND
(K139) WASTEGATE SOLENOID DRIVER SHORTED TO VOLTAGE
(K139) WASTEGATE SOLENOID DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT
ECM
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
Damaged wiring harness or connectors
Turn Ignition off.
Disconnect the ECM harness connectors.
Disconnect the Wastegate Solenoid harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Are any wires or pins damaged?
Yes
>> Repair or replace any damaged wire or connectors.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No
>> Go To 2
9 - 1180
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0243-WASTEGATE PRESSURE CONTROL PWM (CONTINUED)
2.
WASTEGATE SOLENOID
Reconnect the ECM harness connector.
Reconnect the disconnected Wastegate Solenoid harness connector.
Turn the Ignition on, engine not running.
Disconnect the Wastegate Solenoid harness connector.
Connect an incandescent test light across the supply and driver pins
at the Wastegate Solenoid harness connector.
NOTE: The ECM will perform a self check of the circuit after
approximately 30 seconds, which should light the incandescent
test light.
Does the light illuminate brightly after 30 seconds of being con-
nected?
Yes
>> Replace the Wastegate Solenoid.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No
>> Go To 3
3.
(F504) FUSED IGNITION SWITCH OUTPUT OPEN
Connect an test light between the Wastegate Solenoid connector
Fused ignition switch output circuit and battery negative.
Compare the test light brightness to that of a direct connection to the
battery.
Does the light illuminate brightly?
Yes
>> Go To 4
No
>> Repair the open (F504) Fused Ignition switch output cir-
cuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1181
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