Pinpoint Tests

Pinpoint Tests

PINPOINT TEST G556798p1 : EVAPORATIVE SYSTEM INCORRECT PURGE FLOW

G556798t1 : CHECK FUEL FILLER CAP INSTALLATION AND CONDITION OF CANISTER, PIPES AND CONNECTORS
1 Make sure that the fuel filler cap is correctly installed and tightened.
2 Check the condition of the carbon canister.
3 Check the condition of all accessible pipes and connectors in the vapor line.
- Are the canister and all pipes and connectors in good condition?

->Yes
GO to Pinpoint Test G556798t2.

->No
REPAIR as necessary. CLEAR the DTC, test the system for normal operation.

G556798t2 : CHECK THAT THE PURGE VALVE IS OPERATING
1 Disconnect the vapor pipe from the inlet port of the evaporative purge valve.
2 RUN the engine for 2 minutes, making sure that the engine reaches normal operating temperature.
3 Check that the evaporative purge valve is operating, by touch or by sound (using a stethoscope, it will be possible to hear the valve operating).
- Is the valve operating?

->Yes
CHECK for related DTCs. Refer to the DTC Index above.

->No
CHECK the purge valve circuits.
GO to Pinpoint Test G556798p3.

PINPOINT TEST G556798p2 : CHANGE-OVER VALVE (COV) CONTROL CIRCUIT

G556798t3 : CHECK THE COV CONTROL CIRCUIT FOR SHORT CIRCUIT TO GROUND
1 Set ignition status to OFF.
2 Disconnect the DMTL electrical connector, CV011.
3 Measure the resistance between:





- 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 G556798t4.

G556798t4 : CHECK THE COV CONTROL CIRCUIT FOR SHORT CIRCUIT TO POWER
1 Measure the resistance between:





- 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 G556798t5.

G556798t5 : CHECK THE COV CONTROL CIRCUIT FOR HIGH RESISTANCE
1 Disconnect the ECM electrical connector, FL072.
2 Measure the resistance between:





- 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 assembly. If the DTC is repeated, refer to the new ECM installation notes at the top of the DTC Index.

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:





- 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:





- 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:





- 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:





- 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.

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:





- 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:





- 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:





- 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:





- 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.

PINPOINT TEST G556798p5 : DIAGNOSTIC MONITORING OF FUEL TANK LEAKAGE (DMTL) 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:





- 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:





- 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:





- 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:





- 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.