PINPOINT TEST G528708p4 : CHECK THE SECONDARY AIR INJECTION VALVE CIRCUITS

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 G528708p4 : CHECK THE SECONDARY AIR INJECTION VALVE CIRCUITS

G528708t20 : CHECK THE SECONDARY AIR INJECTION VALVE SUPPLY VOLTAGE
1. Key off.
2. Disconnect the secondary air injection valve electrical connector, PI90.
3. Key on, engine off.
4. Measure the voltage between:

Secondary air injection Battery
valve connector, PI90
Pin 02 Negative terminal

- Is the voltage less than 10 volts?

-> YES
REPAIR the supply circuit between the secondary air injection valve and battery. This circuit includes fuse 27 of the front power distribution box and the mega fuse. CLEAR the DTC and test the system for normal operation.

-> NO
GO to Pinpoint Test G528708t21.

G528708t21 : CHECK THE SECONDARY AIR INJECTION VALVE CONTROL CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between:

Secondary air injection Battery
valve connector, PI90
Pin 01 Negative terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC and test the system for normal operation.

-> NO
GO to Pinpoint Test G528708t22.

G528708t22 : CHECK THE SECONDARY AIR INJECTION VALVE CONTROL CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Secondary air injection Battery
valve connector, PI90
Pin 01 Positive terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC and test the system for normal operation.

-> NO
GO to Pinpoint Test G528708t23.

G528708t23 : CHECK THE SECONDARY AIR INJECTION VALVE CONTROL CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, EC300.
2. Measure the resistance between:

Secondary air injection ECM connector, EC300
valve connector, PI90
Pin 01 Pin 55

- Is the resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. CLEAR the DTC and test the system for normal operation.

-> NO
INSTALL a new secondary air injection valve. CLEAR the DTC and test the system for normal operation.