PINPOINT TEST G528708P3

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 G528708p3 : (V8 N/A FEDERAL SPECIFICATION ONLY) CHECK THE SECONDARY AIR INJECTION MAP SENSOR CIRCUITS

G528708t9 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR SUPPLY CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Key off.
2. Disconnect the secondary air injection MAP sensor electrical connector, EC120.
3. Measure the resistance between:

Secondary air injection MAP Battery
sensor connector, EC120
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 G528708t14.

G528708t14 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR SUPPLY CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Secondary air injection MAP Battery
sensor connector, EC120
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 G528708t15.

G528708t15 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR SIGNAL CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between:

Secondary air injection MAP Battery
sensor connector, EC120
Pin 02 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 G528708t16.

G528708t16 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Secondary air injection MAP Battery
sensor connector, EC120
Pin 02 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 G528708t17.

G528708t17 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR SUPPLY CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, EC300.
2. Measure the resistance between:

Secondary air injection MAP ECM connector, EC300
sensor connector, EC120
Pin 01 Pin 19

- Is the resistance greater than 5 Ohms?

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

-> NO
GO to Pinpoint Test G528708t18

G528708t18 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR SIGNAL CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between:

Secondary air injection MAP ECM connector, EC300
sensor connector, EC120
Pin 02 Pin 13

- Is the resistance greater than 5 Ohms?

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

-> NO
GO to Pinpoint Test G528708t19.

G528708t19 : CHECK THE SECONDARY AIR INJECTION MAP SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between:

Secondary air injection MAP ECM connector, EC300
sensor connector, EC120
Pin 03 Pin 07

- 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 MAP sensor. CLEAR the DTC and test the system for normal operation.