Pinpoint Test G556798P5

Pinpoint Test G556798p5 : Diagnostic Monitoring Of Fuel Tank Leakage (DTML) Heater Circuit

G556798t14 : CHECK THE POWER SUPPLY TO THE DMTL PUMP
1. Set 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 G556798t15.

G556798t15 : CHECK THE DMTL HEATER 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 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 G556798t16.

G556798t16 : CHECK THE DMTL HEATER CONTROL CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

DMTL pump connector CV011, 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 G556798t17.

G556798t17 : CHECK THE DMTL HEATER CONTROL CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, FL072.
2. Measure the resistance between:

DMTL pump connector CV011, ECM connector FL072,
harness side harness side
Pin 02 Pin 23

- 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 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.