Test Procedure
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- DG1 DETERMINE THE DIAGNOSTIC TROUBLE CODE (DTC) BEING DIAGNOSED
Is DTC P0325 present in the KOEO or KOER self-test?
Yes No GO to DG2. GO to DG10. - DG2 CHECK THE RESISTANCE OF THE KS1
- Verify the KS is connected and properly installed.
- KS connector disconnected.
- Measure the resistance between:
(+) KS Connector, Component Side (-) KS Connector, Component Side KS1+ - Pin 2 KS1- - Pin 1
Is the resistance between 4.39 - 5.35 Mohms?
Yes No GO to DG3. INSTALL a new KS. REFER to the ELECTRONIC ENGINE CONTROLS - HYBRID -- ESCAPE & MARINER .
CLEAR the DTCs. REPEAT the self-test. - DG3 CHECK THE KS1+ CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS
- Ignition ON, engine OFF.
- Measure the voltage between:
(+) KS Connector, Harness Side (-) Vehicle Battery KS1+ - Pin 2 Negative terminal
Is the voltage less than 1 V?
Yes No GO to DG4. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test. - DG4 CHECK THE KS1- CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS
- Measure the voltage between:
(+) KS Connector, Harness Side (-) Vehicle Battery KS1- - Pin 1 Negative terminal
Is the voltage less than 1 V?
Yes No GO to DG5. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test. - Measure the voltage between:
- DG5 CHECK THE KS1+ CIRCUIT FOR AN OPEN IN THE HARNESS
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
(+) KS Connector, Harness Side (-) PCM Connector, Harness Side KS1+ - Pin 2 KS1+ - Pin E46
Is the resistance less than 5 ohms?
Yes No GO to DG6. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test. - DG6 CHECK THE KS1+ CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS
- Measure the resistance between:
(+) KS Connector, Harness Side (-) Vehicle Battery KS1+ - Pin 2 Negative terminal
Is the resistance greater than 10K ohms?
Yes No GO to DG7. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test. - Measure the resistance between:
- DG7 CHECK THE KS1- CIRCUIT FOR AN OPEN IN THE HARNESS
- Measure the resistance between:
(+) KS Connector, Harness Side (-) PCM Connector, Harness Side KS1- - Pin 1 KS1- - Pin E47
Is the resistance less than 5 ohms?
Yes No GO to DG8. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test. - Measure the resistance between:
- DG8 CHECK THE KS1- CIRCUIT FOR A SHORT TO GND IN THE HARNESS
- Measure the resistance between:
(+) KS Connector, Harness Side (-) Vehicle Battery KS1- - Pin 1 Negative terminal
Is the resistance greater than 10K ohms?
Yes No GO to DG9. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test. - Measure the resistance between:
- DG9 CHECK FOR KS HARNESS CIRCUITS SHORTED TOGETHER
- Measure the resistance between:
(+) KS Connector, Harness Side (-) KS Connector, Harness Side KS1+ - Pin 2 KS1- - Pin 1
Is the resistance greater than 10K ohms?
Yes No GO to DG11. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test. - Measure the resistance between:
- DG10 CHECK THE KS CIRCUIT(S) FOR INTERMITTENT CONCERNS
- Check for short to PWR, short to GND, or open KS1+ and KS1- circuit(s) while carrying out a wiggle test on all accessible wiring and connectors associated with the KS.
Is a concern present during the wiggle test?
Yes No REPAIR as necessary.
CLEAR the DTCs. REPEAT the self-test.No concern present. The problem may be intermittent.
GO to PINPOINT TEST Z . - DG11 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
Is the concern still present?
Yes No INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.