3FWB76011-0 Tohatsu STARTER MOTOR BRACKET UPPER

Table 1
Diagnostic Codes Table
Code Conditions which Generate this Code System Response
323-3 Engine Shutdown Lamp : Voltage Above Normal While the output for the engine shutdown lamp is activated, the Electronic Control Module (ECM) detects a short circuit or a short to the +Battery in the circuit that is for the engine shutdown lamp. The code is logged.
The alarm output is activated.
324-3 Warning Lamp (Action) : Voltage Above Normal While the output for the warning lamp is activated, the ECM detects a short circuit or a short to the +Battery in the circuit that is for the warning lamp.
443-3 Crank Terminate Relay : Voltage Below Normal While the output for the crank terminate relay is activated, the ECM detects a short circuit or a short to the +Battery in the circuit that is for the crank terminate relay.
445-3 Run Relay : Voltage Above Normal While the output for the run relay is activated, the ECM detects a short circuit or a short to the +Battery in the circuit that is for the run relay. The ECM has four outputs that are used to indicate the status of engine operation: "Run Relay", "Crank Terminate", "Active Alarm" and "Engine Failure". These outputs can be used to energize indicator lamps or the outputs can be used to interface with other controls.The ECM opens an internal circuit in order to turn off the output. The ECM closes the circuit in order to turn on the output. When the circuit is closed and the output is on, the ECM allows a maximum current of 0.3 amperes to flow through the circuit to a ground circuit that is inside the ECM.If excessive current flows through the circuit, a diagnostic code is generated. A short circuit to the +Battery side will also activate a diagnostic code. Note: These circuits do not sink enough current for illumination of standard incandescent lamps. If a lamp is burned out, replace the lamp with the correct part number that is specified in the engine's Parts Manual."Run Relay" - This output indicates that the engine is in the "Run" status. The engine will start soon or the engine is running."Crank Terminate" - This output indicates that the engine rpm is greater than the programmed engine speed that is required for disengagement of the starting motor."Active Alarm" - This is the alarm output. This output indicates that the ECM has detected an electrical problem or an abnormal operating condition."Engine Failure" - This is the shutdown output. This output indicates that a potentially damaging operating condition was detected by the ECM. The ECM has shut down the engine.Note: While any of these output drivers are on, a short circuit to a positive voltage source or excessive current through the circuit will cause a diagnostic code to become activated. The ECM cannot diagnose the circuit while the output driver is off.A 323-3 Engine Shutdown Lamp : Voltage Above Normal or 324-3 Warning Lamp (Action) : Voltage Above Normal can only be generated if a shutdown condition or an alarm condition is active. Failure to correct a serious condition with the engine can result in engine damage.Use Caterpillar Electronic Technician (ET) to determine if an event code or a diagnostic code that corresponds to the 323-3 or 324-3 diagnostic code is active. You must troubleshoot other event codes and/or diagnostic codes before you troubleshoot a 323-3 or 324-3 diagnostic code. Refer to Troubleshooting, "Event Codes" or Troubleshooting, "Diagnostic Trouble Codes" for the correct test procedure.The most likely causes of a diagnostic code for a status indicator is a poor electrical connection, a problem in a wiring harness, or the lamp. The next likely cause is a problem with the lamp socket assembly. The least likely cause is a problem with the ECM.
Illustration 1 g01444831
Schematic for the status indicators
Test Step 1. Inspect the Electrical Connectors and Wiring
Illustration 2 g01431198
Terminal Box
(1) ECM connector J2/P2
(2) ECM connector J1/P1
(3) 16 amp circuit breaker
(4) Connectors J3/P3 for the customer's connector
(5) Connectors J4/P4 for the optional control panel (if equipped) or for a customer's connector
(6) J5/P5 connectors for the harness
(7) J6/P6 connectors for the harness
Turn the engine control switch to the OFF/RESET position. Switch the 16 amp circuit breaker for the ECM OFF. Note: Some indicators may obtain the status of the engine via a data link. If all of the status indicators are not directly controlled by the ECM, do not proceed with this test.
Illustration 3 g01444872
Inside of the control panel
(8) "Engine Failure" indicator
(9) "Active Alarm" indicator
(10) "Engine On" indicator
(11) Terminal strip
Check the wiring of the equipment in order to determine if the indicators for the engine status are present. Determine whether the circuit for the status indicators is directly controlled by the ECM. Note: For the following steps, refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 4 g01423887
Location of the output wires for the status indicators on the P2 connector
(P2-28) Run Relay
(P2-29) Crank Terminate
(P2-30) Engine Failure
(P2-31) Active Alarm
Illustration 5 g00863317
Terminal box's side of the 47-pin connector (P4)
( P4-C) "Crank Terminate"
(P4-H) "Active Alarm"
(P4-P) "Engine Failure"
(P4-Z) "Run Relay"
Illustration 6 g01423888
Customer connector J3
(J3-7) Crank terminate
(J3-8) Active alarm
(J3-9) Engine failure
(J3-19) Run relay
Thoroughly inspect the ECM J2/P2 connectors. Inspect the customer connectors (J3) and (P3) (if equipped). Inspect connectors (J4) and (P4) for the control panel (if equipped). Inspect the wiring and the connections for the circuit of the status indicators.
Check the allen head screw for each of the ECM connectors and for the customer connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque valu