BKZ0700 Lafayette 3612 Engine Caterpillar parts 3612 Lafayette
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Buy Lafayette 3612 Engine BKZ0700 Caterpillar genuine, new aftermarket tractor parts with delivery
Compatible equipment models: BKZ0700:
MARINE ENGINE 3612 Caterpillar
Illustration 1 g06104803
Tool Part Number Part Description Qty
A 326-4904 Adapter Cable As 1 During the following procedure, refer to the electrical schematic for the application.Complete the procedure in the order in which the steps are listed.
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Thoroughly inspect the terminal connections on the P1/J1 ECM connector and the PWM throttle position sensors. Refer to Troubleshooting, "Electrical Connector - Inspect".
B. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector and the PWM throttle position sensor connector.
C. Check the screw for the ECM connector for the correct torque of 6 N m (53 lb in).
D. Check the harness for corrosion, abrasion, and pinch points from the PWM throttle position sensor to the ECM.
Loose connection or damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring harness. Ensure that all the seals are properly in place and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion, and pinch points.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic connector.
C. Turn the keyswitch to the ON position. Wait at least 10 seconds for activation of the diagnostic codes.
D. Verify if any of the diagnostic codes that are listed in Table 1 are active.
Note: When the ECM calibrates duty cycle values for the low and high idle throttle positions, the ECM assumes the initial lower position for the duty cycle at low idle and the initial upper position for the duty cycle at high idle. The initial lower position and the initial upper position can be obtained by accessing the following screens on the electronic service tool:
As a result, the throttle position status may reach 100 percent well before the throttle pedal is fully depressed. This situation is normal. Cycle the throttle to the high idle position several times for the ECM to adjust the calibration automatically. During normal operation, more movement of the throttle can be required for the throttle position status to increase above 3 percent. The status may reach the 100 percent value prior to the limit of the high idle position. This process is done to ensure that the throttle reaches these two critical points for engine operation.
E. Turn the keyswitch to the OFF position.
Result: At least one of the diagnostic codes listed in Table 1 is active.
Proceed to Test Step 4.
Result: None of the preceding diagnostic codes are active or recently logged - There may be an intermittent fault.
Repair: Refer to Troubleshooting, "Electrical Connector - Inspect" to identify intermittent faults.
If the fault is still present, proceed to Test Step 3.
3. Check the Duty Cycle of the