3BA-66314-0 Nissan PIN

Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
1440-9 Throttle Actuator : Abnormal Update Rate     The Electronic Control Module (ECM) has lost the last four messages that were expected from the throttle actuator over the CAN data link.     The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.    
1440-12 Throttle Actuator : Failure     The throttle actuator has reported that an internal fault has occurred.    The throttle actuator is an electronic actuator that works with the master ECM in order to ensure the correct throttle position during all engine operating conditions.The master ECM is capable of modulating the throttle from a fully closed position to a fully opened position.CommunicationsThe master ECM and the throttle actuator communicate via the CAN data link. The master ECM sends a command signal to the actuator. The actuator sends the following information to the master ECM: actuator position, heartbeat signal, software version and internal fault diagnosis.If the ECM cannot communicate with the actuator, the ECM activates a 1440-9 diagnostic code and the engine is shut down. A 1440-9 diagnostic code is probably caused by a problem with an electrical connector or a harness. The next likely cause is a problem with the actuator or a problem with the power circuit for the actuator. The least likely cause is a problem with the ECM. After checking the power circuit for the actuator, refer to Troubleshooting, "CAN Data Link - Test" for information that is related to troubleshooting the 1440-9 diagnostic code.Self-diagnostic FunctionIf an internal fault is detected by the actuator, the condition is communicated via the CAN data link. The master ECM activates a 1440-12 diagnostic code and the engine is shutdown. The most likely cause of a 1440-12 diagnostic code is a problem with the actuator.
Illustration 1 g01592466
Schematic for the circuit of the throttle actuatorTest Step 1. Inspect the Electrical Connectors and the Wiring
Set the engine control switch to the OFF/RESET position. Remove the electrical power from the engine.
Illustration 2 g01412950
Location of the connectors that are associated with the throttle actuator (terminal box for the master ECM) (1) J1/P1 connectors for the master ECM (2) J5/P5 connectors for the customer's connections (3) J8/P8 connectors for the wiring to the throttle actuator (4) J10/P10 connectors for the optional control panel
Illustration 3 g01412983
Connections at the junction box that are for the throttle actuator (left side engine view) (5) 20 amp fuse for the actuator (6) 6 amp fuse for the keyswitch (7) −Battery
Thoroughly inspect the harness connectors for the throttle actuator. Also, check the mechanical condition of the components of the throttle body. Check the full travel of the throttle plate and the throttle actuator. Ensure that the components are in good mechanical condition. Inspect the condition of connectors (1), (2), (3), and (4). Inspect fuses (5) and (6). Ensure that terminals (7) for the −Battery connections are tight and free of corrosion. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 4 g01412137
Terminal connections at the P1 connector that are for the CAN data link (P1-34) CAN data link − (P1-42) CAN shield (P1-50) CAN data link +
Illustration 5 g01412144
Terminal connections at the P5 connector that are for the CAN data link (P5-53) CAN data link + (P5-54) CAN data link − (P5-55) CAN shield (P5-63) CAN data link + (P5-64) CAN data link − (P5-65) CAN shield
Illustration 6 g01413009
Terminal locations at the P8 connector that are for the throttle actuator (P8-O) CAN data link + (P8-Y) CAN data link − (P8-h) CAN shield
Illustration 7 g01413103
Terminal locations for the connector at the throttle actuator (Terminal C) CAN shield (Terminal F) +Battery (Terminal G) CAN data link − (Terminal M) CAN data link + (Terminal Q) −Battery (Terminal Z) +Battery
Perform a 45 N (10 lb) pull test on each of the wires in the circuit for the throttle actuator.
Check the torque of the allen head screws for each of the ECM connectors and of the engine interface connector. 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 battery to the junction box. Check that the fuses for the circuit are not blown.Expected Result:All connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points.Results:
OK - The connectors, wiring, and fuses appear to be OK. Proceed to Test Step 2.
Not OK - The connectors, wiring, circuit breakers, and fuses are not OK.Repair: Repair the problem. Replace parts, if necessary. Verify that the repair has eliminated the original problem.STOPTest Step 2. Check for Diagnostic Codes
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Restore the electrical power to the engine. Set the engine control switch to the STOP position.
Look for an active 1440-9 diagnostic code or a 1440-12 diagnostic code.Note: Monitor the active diagnostic code and