3C7-01151-0 Tohatsu CHECK VALVE "B"

Illustration 1 g02050694
Schematic for the injector solenoidsTest Step 1. Inspect the Electrical Connectors and the Wiring
Electrical shock hazard. The electronic unit injector system uses 90-120 volts.
Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned off.
Illustration 2 g01130314
Engine components that are associated with the injector solenoids (1) J300A/P300A connectors for the injector solenoids (left bank) (2) J2/P2 connectors (3) J300B/P300B connectors for the injector solenoids (right bank)
Thoroughly inspect connectors (1) , (2) , and (3) . Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g01130329
P2 terminals that are associated with the injector solenoids (P2-18) Injector 8 return (P2-21) Injector 10 return (P2-22) Injector 4 return (P2-31) Injector 6 return (P2-42) Injector 12 return (P2-50) Injector 2 return (P2-58) Injectors 10 & 12 supply (P2-67) Injectors 6 & 8 supply (P2-68) Injectors 2 & 4 supply (P2-99) Injectors 9 & 11 supply (P2-104) Injectors 1 & 3 supply (P2-105) Injector 11 return (P2-106) Injector 5 return (P2-107) Injector 9 return (P2-108) Injector 7 return (P2-115) Injectors 5 & 7 supply (P2-116) Injector 1 return (P2-118) Injector 3 return
Illustration 4 g01130830
J300A terminals that are associated with the injector solenoids (J300A-1) Injector 1 return (J300A-2) Injector 3 return (J300A-3) Injector 5 return (J300A-4) Injector 7 return (J300A-5) Injector 9 return (J300A-6) Injector 11 return (J300A-7) Injectors 1 & 3 supply (J300A-8) Injectors 5 & 7 supply (J300A-9) Injectors 9 & 11 supply
Illustration 5 g01130830
J300B terminals that are associated with the injector solenoids (J300B-1) Injector 12 return (J300B-2) Injector 10 return (J300B-3) Injector 8 return (J300B-4) Injector 6 return (J300B-5) Injector 4 return (J300B-6) Injector 2 return (J300B-7) Injectors 10 & 12 supply (J300B-8) Injectors 6 & 8 supply (J300B-9) Injectors 2 & 4 supply
Perform a 45 N (10 lb) pull test on each of the wires that are associated with injector solenoids.
Check the allen head screw on each ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from each P300 connector to the ECM.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion, or of pinch points.Results:
OK - The harness and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Logged Diagnostic Codes for the Injector Solenoids
Connect Cat ET to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Turn the keyswitch to the ON position.
Check for logged diagnostic codes for the injector solenoids on Cat ET.Expected Result:One or more diagnostic codes for the injector solenoids are logged.Results:
Logged 05 code - A 05 diagnostic code is logged. Proceed to Test Step 4.
Logged 06 code - A 06 diagnostic code is logged. Proceed to Test Step 4.
No logged codes - No diagnostic codes for the injector solenoids are logged. Proceed to Test Step 3.Test Step 3. Check the Variation of the Injectors between Cylinders
Start the engine.