856841 1 Mercury CLAMP

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 works with the engine ECM in order to ensure the correct throttle position during all engine operating conditions.The ECM controls the throttle from a fully closed position to a fully opened position.CommunicationsThe ECM and the throttle actuator communicate via the CAN data link. The ECM sends a command signal to the actuator. The actuator sends the following information to the ECM:
Actuator position
Heartbeat signal
Software version
Internal fault diagnosisIf 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 ECM activates a 1440-12 diagnostic code and the engine is shut down. The most likely cause of a 1440-12 diagnostic code is a problem with the actuator.
Illustration 1 g02148074
Schematic for the circuit of the throttle actuator
Test 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 g01767615
Location of the throttle actuator (right side engine view)
(1) Throttle actuator
Illustration 3 g01766874
Locations of the connectors at the ECM junction box that are for the throttle actuator
(2) J1/P1 ECM connectors
(3) Control harness connector for the wiring to the fuel metering valve
Illustration 4 g01766913
Locations of the connectors at the engine junction box that are for the throttle actuator
(4) Power harness connector at the engine junction box
(5) Engine interface connector at the engine junction box
(6) Interconnect harness connectors
Illustration 5 g01767637
Connections at the engine junction box that are for the throttle actuator (left side engine view)
(F4) 10 amp fuse for the throttle actuator
Thoroughly inspect the harness connectors for throttle actuator (1). Also, thoroughly inspect the condition of connectors (2), (3), (4), (5), and (6). Check fuse (F4) for good repair. Ensure that the power connections that are for the terminal strip in the engine junction box are tight and free of corrosion. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 6 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 7 g01737613
Terminal connections at the control harness connector that are for the CAN data link
(Terminal h) CAN shield
(Terminal j) CAN data link −
(Terminal l) CAN data link +
Illustration 8 g01413103
Terminal locations for the connector at the throttle actuator
(Terminal C) CAN shield
(Terminal F) Keyswitch
(Terminal G) CAN data link −
(Terminal M) CAN data link +
(Terminal Q) −Battery
(Terminal Z) +Battery
Illustration 9 g01767355
Terminal connections at the engine interface connector that are for the CAN data link
(Terminal 35) CAN data link +
(Terminal 36) CAN data link −
(Terminal 38) CAN shield