350-05105-0 Tohatsu STARTER CASE

Illustration 1 g00650338
Schematic for ATA data link with 6-pin connector
Illustration 2 g01156829
Schematic for ATA data link with 9-pin connectorNote: There are two possible configurations for the 9-pin connector.The black 9-pin connector that is shown on this schematic connects directly to 157-4829 Cable Adapter. The diagnostic connector not shown is gray, has +Battery on pin A and −Battery on pin B and connects to service tool cable 139-4166 Data Link Cable As (ATA or Cat).Test Step 1. Inspect Electrical Connectors and Wiring
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Terminal locations for ECM
Thoroughly inspect the following electrical connectors:
ECM vehicle harness connector J1/P1
Cab data link connector
Firewall bulkhead connector
Electronic service tool connectors
ATA data link (terminal 8 and terminal 9) in the connectorsRefer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the ATA data link.
Check the allen head screws on the ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasion and for pinch points from the connector to the ECM.Refer to Illustration 3.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 wiring and the connectors are OK. Proceed to Test Step 2.
Not OK - There is a problem with the wiring and/or the connectors.Repair: Perform the following 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. Determine the Type of Problem with the Data Link
Connect Cat ET to the cab data link connector.
Start the engine.Expected Result:Result 1 The engine starts. The electronic service tool powers up and Cat ET communicates without error.Result 2 The engine starts. Cat ET powers up but an error is displayed.Result 3 The engine cranks but the engine will not start regardless of the condition of Cat ET.Result 4 The engine will not crank regardless of the condition of Cat ET.Result 5 The engine starts but Cat ET does not power up.Note: Check the display screen or check the communication adapter display in order to determine if Cat ET has powered up. Cat ET will display information that shows if the tool is getting power. If Cat ET or the communication adapter powers up, the cab data link connector is receiving power.Results:
Result 1 - There is not a problem with the ATA data link at this time. If an intermittent condition exists, thoroughly inspect all wiring and connectors. Repair: Perform the following diagnostic procedure:Troubleshooting, "Electrical Connectors - Inspect"STOP
Result 2 - Cat ET displays an error message. The ECM is receiving battery power. Proceed to Test Step 5.
Result 3 - The engine will not start.Repair: Perform the following diagnostic procedure:Troubleshooting, "Engine Cranks But Will Not Start"STOP
Result 4 - The engine will not crank.Repair: Perform the following diagnostic procedure:Troubleshooting, "Engine Will Not Crank"STOP
Result 5 - Cat ET does not power up or the communications adapter does not power up. Ensure that the ECM is receiving the correct battery power. Proceed to Test Step 3.Test Step 3. Check the Battery Voltage Supply to the Cab Data Link Connector
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ATA Data Link connector
Turn the ignition key switch to the ON position.
Use a multimeter in order to measure the voltage from the +Battery terminal of the cab data link connector to the −Battery terminal of the cab data link connector.Refer to Illustration 4.Expected Result:The voltage is between 11.0 and 13.5 VDC for a 12 Volt system or between 22.0 and 27.0 VDC for a 24 Volt system.Results:
OK - The cab data link connector is currently receiving the correct voltage. Proceed to Test Step 4.
Not OK - The cab data link connector is not receiving the correct voltage.Repair: Inspect the wiring and fuses to the connector. Repair the wiring or batteries and/or replace the wiring or batteries, as required. Send the vehicle to the OEM dealer for repair, if necessary. Verify that the repair eliminates the problem.STOPTest Step 4. Change Electronic Service Tool Components
If another vehicle or another ECM is available, connect Cat ET to the other vehicle by using the same cables.
Turn the ignition key switch to the ON position. Determine if Cat ET operates correctly on the other ECM.Expected Result:Result 1 The original Cat ET works on another ECM.Result 2 Cat ET does not work on the other ECM.Results:
Result 1 - The original Cat ET works on another ECM. Proceed to Test Step 5.
Result 2 - Cat ET does not work on the other ECM.Repair: Obtain new cables for Cat ET.Verify that the problem is resolved.STOPTest Step 5. Check the Battery Voltage at the ECM
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ECM Breakout T-connector and terminal locations for ECM P1
Ensure that Cat ET is connected to the cab data link connector.
Disconnect vehicle harness connector