Pinpoint Test G556798P3

Pinpoint Test G556798p3 : Purge Valve Control Circuit

G556798t6 : CHECK THE POWER SUPPLY TO THE PURGE VALVE
1. Disconnect the purge valve connector, PI304.
2. Set ignition status to ON, engine OFF.
3. Measure the voltage between:

Purge valve connector PI304, harness side Battery
Pin 01 Negative terminal

- Is the voltage less than 10 volts?

->YES
REPAIR the circuit between the purge valve and battery. This circuit includes harness splices and fuse 14 of the engine junction box. For additional information, refer to the wiring diagrams. Clear the DTC, test the system for normal operation.

->NO
GO to Pinpoint Test G556798t7.

G556798t7 : CHECK THE PURGE VALVE CONTROL CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Set ignition status to OFF.
2. Measure the resistance between:

Purge valve connector PI304, harness side Battery
Pin 02 Negative terminal

- Is the resistance less than 10,000 ohms?

->YES
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear the DTC, test the system for normal operation.

->NO
GO to Pinpoint Test G556798t8.

G556798t8 : CHECK THE PURGE VALVE CONTROL CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Purge valve connector PI304, harness side Battery
Pin 02 Positive terminal

- Is the resistance less than 10,000 ohms?

->YES
REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear the DTC, test the system for normal operation.

->NO
GO to Pinpoint Test G556798t9.

G556798t9 : CHECK THE PURGE VALVE CONTROL CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI300.
2. Measure the resistance between:

Purge valve connector PI304, harness PI300, harness side
side ECM connector
Pin 02 Pin 92

- Is the resistance greater than 5 ohms?

->YES
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. Clear the DTC, test the system for normal operation.

->NO
INSTALL a new purge valve. Clear the DTC, test the system for normal operation. If the DTC is repeated, refer to the new ECM installation notes at the top of the DTC Index.