DTC P0243 - Turbo/Super Charger Wastegate Solenoid A
Description: Open or shorted condition detected in the turbocharger wastegate solenoid control circuit.
Here is the flow chart for that code (some images could need to clicking for zoom)...
P0243-WASTEGATE PRESSURE CONTROL PWM
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).
No
Go To 2
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 connected?
Yes
Replace the Wastegate Solenoid.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
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 circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
4. (K139) WASTEGATE SOLENOID DRIVER CIRCUIT OPEN 
Disconnect the ECM harness connectors.
Measure the resistance of the Wastegate Solenoid driver circuit between the Wastegate Solenoid harness connector and the ECM harness connector.
Is the resistance less than 10 Ohms?
Yes
Go To 5
No
Repair the open (K139) Wastegate Solenoid control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
5. (K139) WASTEGATE SOLENOID CIRCUIT SHORTED TO GROUND 
Measure the resistance of the (K139) Wastegate Solenoid driver circuit between the Wastegate Solenoid harness connector and battery negative.
Is the resistance less than 10 Ohms?
Yes
Repair the (K139) Wastegate solenoid circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No
Go To 6
6. (K139) WASTEGATE SOLENOID DRIVjeep grand cherokee 2.7 crd - zjlimited_344.gifTAGE 
Measure the voltage between the (K139) Wastegate Solenoid driver circuit at the Wastegate Solenoid connector and battery negative.
Is the voltage less than 1 volt?
Yes
Go To 7
No
Repair the (K139) Wastegate solenoid driver shorted to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
7. (K139) WASTEGATEjeep grand cherokee 2.7 crd - zjlimited_345.gifCIRCUIT SHORTED TO ANOTHER CIRCUIT 
Measure the resistance between the (K139) Wastegate Solenoid driver circuit in the ECM harness connector and all other circuits in the ECM harness connectors.
Is the resistance less than 10 Ohms?
Yes
Repair the (K139) Wastegate solenoid circuit shorted to another circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TESjeep grand cherokee 2.7 crd - zjlimited_346.gif>
No
Go To8
8. 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 connected?
Yes
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
No
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
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Hi,
Can you explain how to make:
- Pre-Diagnostic Troubleshooting procedure
- POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL)
I'm trying to test that, but I only have the service manual in spanish and I don't find this option...
Thanks
Hello
Hello, I had the Same problem for months and got progressively worse, I was told replace the battery to low voltage (Did not work), I was told replace the Injectors (Did not work), I was told to replace the warring (Did not work), I was told to replace the waste gate solenoid (Did not work), So I looked and slightly adjusted the Turbo waste gate actuator and problem was gone
How did you adjust the wastegate solenoid. Thanks, Nick
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P0243 - Turbocharger Wastegate Solenoid A Malfunction
Possible causes
- VPWR circuit open to SCB (solenoid controlled boost) solenoid.
- SCB solenoid circuit shorted to PWR GND or CHASSIS GND.
- Damaged SCB solenoid.
- SCB solenoid circuit open.
- SCB solenoid circuit shorted to VPWR.
Possible solution
Disconnect SCB solenoid. Connect test lamp to SCB solenoid harness connector. Cycle SCB driver in PCM by Output Test Mode. Test lamp cycle on and off - SCB solenoid is suspect. Test lamp always on - SCB signal short in harness or PCM. Test always off - SCB signal or VPWR open in harness or PCM (computer).
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