Pinpoint Test G556798P4

Pinpoint Test G556798p4 : Diagnostic Monitoring Of Fuel Tank Leakage (DMTL) Pump Control Circuit

G556798t10 : CHECK THE POWER SUPPLY TO THE DMTL PUMP
1. Set the ignition status to OFF.
2. Disconnect the DMTL pump electrical connector, CV011.
3. Set ignition status to ON, engine OFF.
4. Measure the voltage between:

DMTL pump connector CV011, harness side Battery
Pin 04 Negative terminal

- Is the voltage less than 10 volts?

->YES
REPAIR the circuit between the DMTL pump and battery. This circuit includes harness splice FLS05 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 G556798t11.

G556798t11 : CHECK THE DMTL PUMP CONTROL CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Set ignition status to OFF.
2. Measure the resistance between:

DMTL pump connector CV011, harness side Battery
Pin 01 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 G556798t12.

G556798t12 : CHECK THE DMTL PUMP CONTROL CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

DMTL pump connector CV011, harness side Battery
Pin 01 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 G556798t13.

G556798t13 : CHECK THE DMTL PUMP CONTROL CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, FL072.
2. Measure the resistance between:

DMTL pump connector CV011, harness side ECM connector FL072, harness side
Pin 01 Pin33

- Is the resistance greater than 5 ohms?

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

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