3GR-03200-0 Tohatsu CARBURETOR ASSEMBLY

Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
2417-5 Ether Injection Control Solenoid : Current Below Normal The Electronic Control Module (ECM) detects low current in the circuit. The ECM can only detect this condition when the output driver is not activated. The code is logged.
Ether injection is disabled.
2417-6 Ether Injection Control Solenoid : Current Above Normal The ECM detects excessive current flow in the circuit. The ECM can only detect this condition when the output driver is activated. The code is logged.
The ECM attempts to energize the circuit in order to determine if the fault remains active. The starting aid output from the ECM is used to connect to a solenoid in order to control a starting aid system. The starting aid system will inject ether into the inlet air manifold in order to aid starting of the engine during cold weather operation. The output is automatically controlled by the ECM.The reading of the coolant temperature sensor is used to determine if conditions require the use of the starting aid. If a fault condition exists with the circuit for the coolant temperature sensor, the reading for the intake manifold air temperature sensor will be used. The starting aid output will be enabled for a maximum of 30 seconds while the engine is cranking and the temperature reading is below 0 °C (32 °F). The starting aid output is disabled when the engine starts. The starting aid output is also disabled if a condition that disables fuel injection occurs.The -5 code indicates a low current in the solenoid circuit. The most likely cause of this code is an open circuit or a high resistance in the solenoid or the solenoid circuit. The next likely cause is a short to the +Battery. The least likely cause is a problem with the ECM.The -6 code indicates a high current in the solenoid circuit. The most likely cause of this code is a short circuit to ground in the solenoid or the solenoid circuit. The least likely cause is a problem with the ECM.An override parameter in Caterpillar Electronic Technician (ET) allows the technician to activate the ether system for testing. The test is only functional when the engine speed is zero rpm. Access the test via the "Override Parameters" screen in Cat ET.
Illustration 1 g01514721
Schematic of the ether injection system
Breathing ether vapors or repeated contact of ether with skin can cause personal injury. Personal injury may occur from failure to adhere to the following procedures.Use ether only in well ventilated areas.Do not smoke while changing ether cylinders.Use ether with care to avoid fires.Do not store replacement ether cylinders in living areas or in the operator's compartment.Do not store ether cylinders in direct sunlight or at temperatures above 49 °C (120 °F).Discard cylinders in a safe place. Do not puncture or burn cylinders.Keep ether cylinders out of the reach of unauthorized personnel.To avoid possible injury, be sure the brakes are applied and all controls are in Hold or Neutral when starting the engine.
Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the ECM.
Illustration 2 g01515023
Location of the connectors that are associated with the ether injection system (typical top side engine view)
(1) Left rail connector
(2) J1/P1 ECM connectors
(3) J2/P2 ECM connectors
Illustration 3 g01324401
Location of the connectors at the ether injection solenoid (typical example)
(4) Connectors for the ether injection solenoid
Thoroughly inspect connectors (1), (2), and (3). Also, inspect each connector (4) for the ether solenoids. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 4 g01515036
Terminal locations at the P2 ECM connector for the ether starting aid
(P2-14) Digital return
Illustration 5 g01324366
Terminal locations at the P1 ECM connector for the ether starting aid
(P1-20) Ether solenoid
Illustration 6 g01515056
Terminal locations at the right rail connector that are for the ether starting aid
(Terminal 22) Ether solenoid
(Terminal 65) Digital return
Illustration 7 g01155187
Connector for the Ether start valve
(Terminal 1) Ether solenoid
(Terminal 2) Digital return
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the ether injection system.
Check the torque of the allen head screws for each of the ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from the connectors for the ether injection solenoid 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 and of pinch points.Results:
OK - The connectors and the wiring appear to be OK. Proceed to Test Step 2.
Not OK - The connectors and/or the wiring are not OK.Rep