DTC P06DA-P06DD or P13B1

Engine Mechanical - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 6193415 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P06DA Engine Oil Pressure Control Valve Control Circuit DTC P06DB Engine Oil Pressure Control Valve Control Circuit Low DTC P06DC Engine Oil Pressure Control Valve Control Circuit High DTC P06DD Engine Oil Pressure Control Valve Performance DTC P13B1 Engine Oil Pressure Control Valve High Control Circuit Low Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performanc
Control	P06DA, P06DB*	P06DA, P06DB	—	—
Low Reference	P06DB	P06DA*	P06DC	P06DD
* Additional DTCs may set

Circuit/System Description

Circuit	Description
Control terminal 1	The output circuit is switched to 12 V to activate the component.
Control terminal 2	The output circuit is switched to ground to enable the component(s).

	Component	Description
	K20 Engine Control Module	The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of

Component	Description
	sensors, interprets the data and adjusts the engine actuators accordingly.
Q44 Engine Oil Pressure Control Solenoid Valve	A solenoid valve is an electro-mechanically operated valve. The valve is controlled by an electric current through the solenoid.

The engine oil pressure control solenoid valve is used to control engine oil pressure inside the mechanical engine oil pump. The control module controls the commanded state of the solenoid valve based on the following inputs: Calculated Engine Oil Temperature Engine Oil Pressure Engine Run Time Engine Speed When the solenoid valve is commanded Off, oil pressure is higher. When the solenoid valve is commanded On, oil pressure is lower. Conditions for Running the DTC P06DA, P06DB, P06DC, P13B1 Engine = Running Ignition Voltage = Greater than 11 V Frequency the DTC runs = Continuously — After the running conditions are met P06DD DTC P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0117, P0118, P0119, P0128, P0335, P0336, P0521, P0522, P0523, P06DA, P06DB, P06DC, P06DD, P06DE, P111E, P2227, P2228, P2229, P2230 = Not set Engine Speed = 1,500 to 2,500 RPM Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC P06DA, P06DB, P06DC, P13B1 Control Circuit = Commanded state does not match the actual state — For greater than 1 s P06DD Engine Oil Pressure = Greater than a predefined threshold Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type B DTC — Exceptions listed below DTC P06DB, P06DD, P13B1 = Type A DTC Engine Oil Pressure Control Solenoid Valve = Off Reduced Engine Power = Active Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type B DTC — Exceptions listed below DTC P06DB, P06DD, P13B1 = Type A DTC Reference Information Schematic Reference Engine Mechanical Schematics Connector End View Reference Master Electrical Component List Component View Reference Powertrain Component Views Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

Note

The engine oil level and condition is critical to the correct operation of the system.

1. Ignition » On / Vehicle » In Service Mode
2. Verify there are no DTCs set related to the following component/system: B35B Engine Oil Level Sensor B37 Engine Oil Pressure Switch B37B Engine Oil Pressure Sensor ⇒ If other DTCs are set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If no other DTCs are set
3. Verify the condition does not exist: Engine Oil — Contaminated / Dirty / Fill Level = Low ⇒ If a condition exists Repair as necessary ⇓ If no condition exists
4. Verify the scan tool parameter: Engine Oil Pressure Control Valve Control Circuit High Test Status = Not Run or Okay Engine Oil Pressure Control Valve Control Circuit Low Test Status = Not Run or Okay Engine Oil Pressure Control Valve Control Circuit Open Test Status = Not Run or Okay ⇒ If not the specified state Refer to: Circuit/System Testing ⇓ If the specified state
5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data. Verify the DTC does not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC is not set
6. All OK. Circuit/System Testing Test 1
7. Ignition/Vehicle » Off
8. Disconnect the electrical connector: X129 Inline Harness Connector
9. Ignition » On / Vehicle » In Service Mode

Note

Testing for steps 4 to 5 is performed on the control module K20 side of the harness connector.

4. Test for 12 V (±2 V) between the test points: Control circuit terminal 1 & Ground ⇒ If not the specified value 4.1. Ignition/Vehicle » Off 4.2. Disconnect the electrical connector: X2 @ K20 Engine Control Module 4.3. Test for infinite resistance between the test points: Control circuit terminal 1 & Ground ⇒ If less than infinite resistance » Repair the short to ground on the circuit. ⇓ If infinite resistance 4.4. Test for less than 2 Ω between the test points: Control circuit terminal 1 @ X129 Inline Harness Connector & Control circuit terminal 53 X2 @ K20 Engine Control Module ⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit. ⇓ If less than 2 Ω 4.5. Ignition » On / Vehicle » In Service Mode 4.6. Test for less than 1 V between the test points: Control circuit terminal 1 & Ground ⇒ If 1 V or greater » Repair the short to voltage on the circuit. ⇒ If less than 1 V » Replace the component: K20 Engine Control Module ⇓ If the specified value
5. Test for 0.30 V (±0.20 V) between the test points: Control circuit terminal 2 & Ground ⇒ If not the specified value 5.1. Ignition/Vehicle » Off 5.2. Disconnect the electrical connector: X2 @ K20 Engine Control Module 5.3. Test for infinite resistance between the test points: Control circuit terminal 2 & Ground ⇒ If less than infinite resistance » Repair the short to ground on the circuit. ⇓ If infinite resistance 5.4. Test for less than 2 Ω between the test points: Control circuit terminal 2 @ X129 Inline Harness Connector & Control circuit terminal 25 X2 @ K20 Engine Control Module ⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit. ⇓ If less than 2 Ω 5.5. Ignition » On / Vehicle » In Service Mode 5.6. Test for less than 1 V between the test points: Control circuit terminal 2 & Ground ⇒ If 1 V or greater » Repair the short to voltage on the circuit. ⇒ If less than 1 V » Replace the component: K20 Engine Control Module ⇓ If the specified value
6. Ignition/Vehicle » Off

Note

Testing for steps 7 to 8 is performed on the component side of the harness connector.

7. Test for less than 20 Ω between the test points: Control circuit terminal 1 & Control circuit terminal 2 ⇒ If 20 Ω or greater 7.1. Disconnect the appropriate electrical connector: Q44 Engine Oil Pressure Control Solenoid Valve 7.2. Test for less than 2 Ω between the test points: Control circuit terminal 1 @ X129 Inline Harness Connector & Control circuit terminal 2 @ Component harness Control circuit terminal 2 @ X129 Inline Harness Connector & Control circuit terminal 1 @ Component harness ⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit. ⇒ If less than 2 Ω » Replace the component: Q44 Engine Oil Pressure Control Solenoid Valve ⇓ If less than 20 Ω
8. Test or replace the component: Q44 Engine Oil Pressure Control Solenoid Valve Component Testing Static Test
9. Ignition/Vehicle » Off
10. Disconnect the electrical connector: Q44 Engine Oil Pressure Control Solenoid Valve
11. Test for 5 to 20 Ω between the test points: Control terminal 1 & Control terminal 2 ⇒ If not between 5 and 20 Ω Replace the component: Q44 Engine Oil Pressure Control Solenoid Valve ⇓ If between 5 and 20 Ω
12. Test for infinite resistance between the test points: Each terminal of the component & The component’s housing ⇒ If less than infinite resistance Replace the component: Q44 Engine Oil Pressure Control Solenoid Valve ⇓ If infinite resistance
13. All OK. Dynamic Test
14. Ignition/Vehicle » Off
15. Disconnect the electrical connector: Q44 Engine Oil Pressure Control Solenoid Valve
16. Connect a jumper wire between the test points: Control terminal 2 & Ground

Caution

Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

4. Momentarily connect a 3 A fused jumper wire between the test points: Control terminal 1 & 12 V Verify the component turns On and Off when connecting and disconnecting the jumper wire: Q44 Engine Oil Pressure Control Solenoid Valve ⇒ If the component does not turn On and Off Replace the component: Q44 Engine Oil Pressure Control Solenoid Valve ⇓ If the component turns On and Off
5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Oil Pump Flow Control Solenoid Valve Replacement — Q44 Engine Oil Pressure Control Solenoid Valve Oil Pump Flow Control Solenoid Valve Harness Replacement — Oil Pump Flow Control Solenoid Valve Harness For control module replacement, programming, and setup refer to: Control Module References