STEP 6. Measure the sensor supply voltage at ECM connector B-27 by using power plant ECU check harness special tool MB992110.
(1) Disconnect all ECM connectors. Connect the power plant ECU check harness special tool MB992110 between the separated connectors.
(2) Disconnect the fuel pump module connector D-24.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal No. 115 and ground.- Voltage should be between 4.5 and 4.9 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.5 and 4.9 volts?
Check harness connector C-28 at intermediate connector for damage, and repair or replace as required. Refer to GROUP 00E, Harness Connector Inspection . If intermediate connector is in good condition, repair harness wire between fuel pump module connector D-24 (terminal No. 3) and ECM connector B-27 (terminal No. 115) because of open circuit. Then go to Step 9. Go to Step 8.