6625A 3 Mercury CLAMP BRACKET ASSEMBLY

Illustration 1 g01190329
Schematic for the remote throttleTest Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF/RESET position.
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Left side view (1) J1/P1 ECM connectors
Thoroughly inspect connectors (1) and any other connectors in the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for corrosion, abrasion, and pinch points from the throttle switch to the ECM.Expected Result:All connectors, pins, and sockets are completely inserted and coupled. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The wiring and the connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the wiring and/or the connectors.Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. 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 the Status of the Remote Throttle
Ensure that the transmission is in the Neutral position. Apply the parking brake. Start the scraper engine. Place the throttle for the scraper engine in the low idle position.
Connect the Caterpillar Electronic Technician (Cat ET) to the service tool connector.
Access the status for the "Remote Throttle Switch".
While you monitor the status, set the remote throttle switch to the ON position.
While you monitor the status, operate the set/accel switch and the resume/decel switch.Expected Result:The status for the "Remote Throttle Switch" indicates "On" when the On/Off switch is in the ON position.The status for the "Remote Throttle Accel" indicates "On" when the set/accel switch is in the ACCEL position.The status for the "Remote Throttle Decel" indicates "On" when the resume/decel switch is in the DECEL position.Results:
OK - The status changed accordingly.Repair: The remote throttle is operating properly at this time.Verify that the requirements for the remote throttle were met prior to the problem.If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - There is a problem with the switch circuits. Proceed to Test Step 3.Test Step 3. Check the Switch Circuits at the Harness ConnectorNote: If all of the switches are inoperative, the problem may be caused by the return wire.
Turn the keyswitch to the OFF position.
Illustration 3 g01143254
Right side of the scraper (1) Harness connector
Disconnect harness connector (1) .
Turn the keyswitch to the ON position.
Illustration 4 g01143313
Harness connector (6) Decel (21) Accel (22) Digital return (25) On/Off (NO) (27) On/Off (NC)
While you monitor the status for the remote throttle, use a jumper wire to connect the following terminals to 22 (Digital return) on the harness connector:
27 (On/Off (NC))
25 (On/Off (NO))
21 (Accel)
6 (Decel)
Table 1
Status for the Remote Throttle    
Status     Terminal    
27 25     21     6    
Remote Throttle Switch     Off     On     (1)     (1)    
Remote Throttle Accel     Off     Off     On     Off    
Remote Throttle Decel     Off     Off     Off     On    
( 1 ) The status for "Remote Throttle Switch" will indicate "Abnormal or Incorrect Data".Expected Result:The status for the remote throttle changes according to Table 1.Results:
OK - The status for the remote throttle changes according to the Table. There is a problem between the machine connector and the switches.Repair: Connect the harness connectors. Proceed to Test Step 5.
Not OK - The status for the remote throttle does not change according to the Table. There is a problem between the machine connector and the ECM.Repair: Leave the harness connectors disconnected. Proceed to Test Step 4.Test Step 4. Check the Switch Circuits at the ECM
Turn the keyswitch to the OFF position.
Insert a 7X-1715 Adapter Cable As (40-PIN BREAKOUT) between the J1 and P1 ECM connectors.
Turn the keyswitch to the ON position.Note: The harness connectors must be disconnected.
While you monitor the status for the remote throttle switch, use a jumper wire to connect the following terminals to terminal 529 (Digital return) on the breakout T.
45 (On/Off (NC))
44 (On/Off (NO))
46 (Accel)
47 (Decel)
Table 2
Status for the Remote Throttle    
Status     Terminal    
45 44     46     47    
Remote Throttle Switch     Off     On     (1)     (1)    
Remote Throttle Accel     Off     Off     On     Off