Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

Ignition/Vehicle & All vehicle systems - Off
Disconnect the electrical connector: Q45 Piston Cooling Oil Jet Solenoid Valve
Ignition - On/Vehicle - In Service Mode
Verify a test lamp turns On between the test points: Ignition circuit terminal 1 & Ground
- If the test lamp does not turn On and the circuit fuse is OK
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Test for less than 2 ohms between the test points: Ignition circuit terminal 1 & Output terminal @ Fuse
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Verify the fuse is OK and there is voltage at the fuse.
- If the test lamp does not turn On and the circuit fuse is open
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Connect the electrical connector: Q45 Piston Cooling Oil Jet Solenoid Valve
3. Ignition - On/Vehicle - In Service Mode
4. Replace the component: Fuse
5. Verify the fuse does not open.
  - If the fuse opens and there are components connected to the circuit - Disconnect a component and repeat step 4.4
  - If the fuse opens with all components disconnected from the circuit - Repair the short to ground on the circuit.
  - If the fuse does not open after disconnecting a component from the circuit - Replace the component disconnected last.
  - If the fuse does not open with all components connected.
6. Verify the fuse does not open when any of the components are activated.
  - If the fuse opens - Replace the component that caused the fuse to open when activated.
  - If the fuse does not open.
7. All OK.
- Go to next step: If the test lamp turns On
Verify a test lamp does not turn On between the test points: Control circuit terminal 2 & B+
- If the test lamp turns On
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Disconnect the electrical connector: K20 Engine Control Module
3. Test for infinite resistance between the test points: Control circuit terminal 2 @ Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - If infinite resistance - Replace the component: K20 Engine Control Module
- Go to next step: If the test lamp does not turn On
Remove - Test Lamp
Perform the scan tool control function: Piston Cooling Oil Jet Solenoid Valve - On
Verify the scan tool parameter: Piston Cooling Oil Jet Solenoid Valve Control Circuit High Voltage Test Status = OK or Not Run
- If not the specified state
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: K20 Engine Control Module
3. Ignition - On/Vehicle - In Service Mode
4. Test for less than 1 V between the test points: Control circuit terminal 2 @ Component harness & 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
- Go to next step: If the specified state
Connect a 3 A fused jumper wire between the test points: Control circuit terminal 2 & Ignition circuit terminal 1
Perform the scan tool control function: Piston Cooling Oil Jet Solenoid Valve - On
Verify the scan tool parameter: Piston Cooling Oil Jet Solenoid Valve Control Circuit High Voltage Test Status = Malfunction
- If not the specified state
1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
2. Disconnect the electrical connector: X2 @ K20 Engine Control Module
3. Test for less than 2 ohms between the test points: Control circuit terminal 2 @ Component harness & The other end of the circuit @ Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: K20 Engine Control Module
- Go to next step: If the specified state
Test or replace the component: Q45 Piston Cooling Oil Jet Solenoid Valve