Test Procedure

NOTE: Proceed to DTC testing steps listed in FAULT CODE SETTING CONDITION table of fault code setting condition.

FAULT CODE SETTING CONDITION

Fault Code	KOEO	KOER	Continuous Memory
P0010	HK1	HK1	HK1
P0011		HK15	HK15
P0012		HK15	HK15
P0013	HK1	HK1	HK1
P0020	HK1	HK1	HK1
P0021		HK15	HK15
P0022		HK15	HK15
P1380	HK1	HK1	HK1
P1381		HK15	HK15
P1383		HK15	HK15
P1385	HK1	HK1	HK1
P1386		HK15	HK15
P1388		HK15	HK15

HK1 KOER DTCS P0010, P0013, P0020, P1380 OR P1385: CHECK FOR VCT DTCS

CLEAR the DTCs.
The engine should be at operating temperature before running the self-test.
Run PCM KOER Self -Test.

Are DTCs P0010, P0013, P0020, P1380 or P1385 present?

Yes	No
For KOER DTCs P0010, P0013 or P1380 GO to HK3. For KOER DTCs P0020 or P1385 GO to HK9.	GO to HK2.

HK2 PERFORM A THOROUGH WIGGLE TEST ON THE VARIABLE CAM TIMING (VCT) HARNESS

Perform a thorough wiggle test on all Variable Cam Timing (VCT) harnesses.
Run KOER Self-Test.

Are DTCs P0010, P0020, P1380 or P1385 present?

Yes	No
For KOER DTCs P0010 or P1380 GO to HK3. For KOER DTCs P0020 or P1385 GO to HK9.	GO to PINPOINT TEST Z step 1 .

HK3 CHECK THE VCT1 SOLENOID RESISTANCE

Key OFF.
VCT1 Actuator connector disconnected.

Measure the resistance between:

( + )VCT1 Actuator Connector, Component Side	( - )VCT1 Actuator Connector, Component Side
VCT1	VPWR

Is the resistance between 5 ohms-14 ohms?

Yes	No
GO to HK4 .	INSTALL a new VCT1 actuator .

HK4 CHECK THE VCT1 SOLENOID FOR INTERNAL SHORTS

Measure the resistance between:

( + )VCT1 Actuator Connector, Component Side	( - )
VCT1	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to HK5.	INSTALL a new VCT1 actuator.

HK5 CHECK THE VPWR CIRCUIT FOR AN OPEN IN THE HARNESS

Key ON Engine OFF.

Measure the voltage between:

( + )VCT1 Actuator Connector, Harness Side	( - )
VPWR	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to HK6.	REPAIR open circuit.

HK6 CHECK THE VCT1 CIRCUIT FOR A SHORT TO PWR IN THE HARNESS

Key OFF.
PCM connector disconnected.
Key ON Engine OFF.

Measure the voltage between:

( + )VCT1 Actuator Connector, Harness Side	( - )
VCT1	Ground

Is the voltage less than 1 V?

Yes	No
GO to HK7.	REPAIR short circuit to PWR.

HK7 CHECK THE VCT1 CIRCUIT FOR AN OPEN IN THE HARNESS

Key OFF.

Measure the resistance between:

( + )VCT1 Actuator Connector, Harness Side	( - )PCM Connector, Harness Side
VCT1	VCT1

Is the resistance less than 5 ohms?

Yes	No
GO to HK8.	REPAIR open circuit.

HK8 CHECK THE VCT1 CIRCUIT FOR A SHORT TO GND IN THE HARNESS

Measure the resistance between:

( + )VCT1 Actuator Connector, Harness Side	( - )
VCT1	Ground

Is the resistance greater than 10K ohms?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .	REPAIR short circuit to GND.

HK9 CHECK THE VCT2 SOLENOID RESISTANCE

Key OFF.
VCT2 Actuator connector disconnected.

Measure the resistance between:

( + )VCT2 Actuator Connector, Component Side	( - )VCT2 Actuator Connector, Component Side
VCT2	VPWR

Is the resistance between 5 ohms - 14 ohms?

Yes	No
GO to HK10.	INSTALL a new VCT2 actuator.

HK10 CHECK THE VCT2 SOLENOID FOR INTERNAL SHORTS

Measure the resistance between:

( + )VCT2 Actuator Connector, Component Side	( - )
VCT2	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to HK11.	INSTALL a new VCT2 actuator.

HK11 CHECK THE VPWR CIRCUIT FOR AN OPEN IN THE HARNESS

Key ON Engine OFF.

Measure the voltage between:

( + )VCT2 Actuator Connector, Harness Side	( - )
VPWR	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to HK12.	REPAIR open circuit.

HK12 CHECK THE VCT2 CIRCUIT FOR A SHORT TO PWR IN THE HARNESS

Key OFF.
PCM connector disconnected.
Key ON Engine OFF.

Measure the voltage between:

( + )VCT2 Actuator Connector, Harness Side	( - )
VCT2	Ground

Is the voltage less than 1 V?

Yes	No
GO to HK13.	REPAIR short circuit to PWR.

HK13 CHECK THE VCT2 CIRCUIT FOR AN OPEN IN THE HARNESS

Key OFF.

Measure the resistance between:

( + )VCT2 Actuator Connector, Harness Side	( - )PCM Connector, Harness Side
VCT2	VCT2

Is the resistance less than 5 ohms?

Yes	No
GO to HK14.	REPAIR open circuit.

HK14 CHECK THE VCT2 CIRCUIT FOR A SHORT TO GND IN THE HARNESS

Measure the resistance between:

( + )VCT2 Actuator Connector, Harness Side	( - )
VCT2	Ground

Is the resistance greater than 10K ohms?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .	REPAIR short circuit to GND.

HK15 KOER DTCS P0011, P1381, P0012, P1383, P0021, P1386, P0022 AND P1388:

NOTE: Oil contamination in VCT systems can cause positioning errors.

NOTE: VCT systems require an oil filter specific to the application.

NOTE: CHECK the operation of the VCT solenoid and check for a stuck or sticking solenoid valve caused by contamination. If the valve is stuck, check the spider bracket for contamination prior to solenoid replacement.

CHECK the vehicle oil filter identification to make sure it is the proper type.
Engine at normal operating temperature.
Clear fault codes.
KOER Self Test.
CHECK KOER DTCs:

Are DTCs P0011, P1381, P0012, P1383, P0021, P1386, P0022 or P1388 present?

Yes	No
KEY OFF. INSTALL a new VCT actuator and retest vehicle. REFER to the appropriate ENGINE article.	Unable to duplicate or identify the fault at this time. GO to PINPOINT TEST Z step 1 .