PINPOINT TEST G532445p3 : CHANGE-OVER VALVE (COV) CONTROL CIRCUIT

Pinpoint Tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

NOTE:
- When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.
- Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PINPOINT TEST G532445p3 : CHANGE-OVER VALVE (COV) CONTROL CIRCUIT

G532445t8 : CHECK THE COV CONTROL CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Key off.
2. Disconnect the DMTL electrical connector, CV09.
3. Measure the resistance between:

DMTL connector CV09, Battery
harness side
Pin 03 Negative terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. Clear the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532445t9.

G532445t9 : CHECK THE COV CONTROL CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

DMTL connector CV09, Battery
harness side
Pin 03 Positive terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. Clear the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532445t10.

G532445t10 : CHECK THE COV CONTROL CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, EC300.
2. Measure the resistance between:

DMTL connector CV09, ECM connector EC300,
harness side harness side
Pin 03 Pin 48

- Is the resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. Clear the DTC, test the system for normal operation.

-> NO
INSTALL a new DMTL assembly. If the DTC is repeated, refer to the warranty policy and procedures manual if an ECM is suspect.