20820358 Volvo.Penta Cylinder liner kit

Table 1
Diagnostic Codes Table
Description Conditions which Generate this Code System Response
337-2 Remote Emergency Stop Switch erratic, intermittent, or incorrect The two inputs from the remote emergency stop switch are in the opposite state. The code is logged. The customer's remote emergency stop switch sends two signals to the Electronic Control Module (ECM). The signals are used to determine if the remote emergency stop switch is active. The customer's remote emergency stop switch is active when the switch is in the open state and the two signals are high. The customer's remote emergency stop switch is inactive when the switch is in the closed state and the two signals are held low.If the ECM is powering up and one of the signals from the customer's remote emergency stop switch is in a different state from the other signal, the ECM determines that one of the signals is faulty. If one of the signals from the customer's remote emergency stop switch is in a different state from the other signal, the ECM will generate a diagnostic code that remains active until power to the ECM is cycled. The ECM will not allow the crank cycle to begin if the signals are opposite of each other. The ECM will allow the engine to be started manually in this state.The ECM monitors the inputs from the customer's remote emergency stop signals at all times. If the engine is running and one of the signals from the customer's remote emergency stop switch changes states, the engine will continue to run. The ECM initiates an emergency stop shutdown only when both signals are high during engine operation.Relay "R3A" and relay "R3" are energized through terminal 3 of the diode assembly. Terminal 3 of the diode assembly will energize relay "R3A" and relay "R3" for 1 second. The contacts of relay "R3" keep relay "R3A" and relay "R3" energized until the Engine Control Switch (ECS) is cycled to the OFF/RESET position. The contacts of relay "R3A" energizes the coil of relay "R2A". When relay "R2A" is energized, power is removed from the ECM. The ECM will power down. The injection signals to the injector solenoids will stop.The contacts of relay "R3A" also supply power to terminal 3 of the connector for a timer. When power is applied to terminal 3 of the connector for the timer, the timer will activate. The timer outputs 24 VDC from terminal 6 of the connector for the timer for 2.5 seconds. The 24 VDC from the timer is applied to the coil of the "ASOS" switch and to terminal 2 of the diode assembly. The "ASOS" switch energizes the two air shutoff solenoids. The solenoids trip the air shutoff valves. The 2.5 second time limit for activation of the "ASOS" switch prevents damage to the air shutoff solenoids. A normally open switch at the air shutoff valves will close when the air shutoff solenoid activates the air shutoff valve. The switch inputs a signal to the ECM. The signal notifies the ECM that the air shutoff valves are closed. The ECM will not send injection signals to the injector solenoids until the switch inputs from the air shutoff valves indicate that the valves are open. The air shutoff valve must be manually opened in order to start the engine.The ECM will not allow the starting sequence to begin when the customer's remote emergency stop switch is activated. The engine will not be able to restart until the following conditions are met:
The engine rpm must equal zero.
The inputs from the customer's remote emergency stop must go low.
The ECM has been reset.The electrical power to the input for the keyswitch must be turned OFF for three seconds in order to reset the engine ECM after an emergency stop condition.Note: If one of the inputs from the customer's remote emergency stop switch is in a different state from the other signal, the Caterpillar Electronic Technician (ET) will display the warning "INVALID DATA".
Illustration 1 g01329445
Typical schematic
Illustration 2 g01218361
P1 ECM connector
(P1-5) Digital return
(P1-23) Emergency stop signal 1
(P1-28) Emergency stop signal 2
Illustration 3 g01323796
Terminal locations for the TB-C1/C-C18 customer connector
(Terminal U) "E-Stop 1"
(Terminal T) "E-Stop 2"
Illustration 4 g01322302
Terminal locations for the following connectors P-C1/A-C90 Connector for the power distribution panel, A-C2/J-C2 RH rigid harness connector and C-C2/J-C1 LH rigid harness connectors
(Terminal G) Drive for the air shutoff switch F708-BK(Black)
(Terminal H) Return for the air shutoff solenoid H708-BK(Black)
(Terminal I) Drive for the air shutoff solenoid G708-BK(Black)
Illustration 5 g01320528
Connector locations
(1) A-C1/E-C2 RH rigid harness connectors
(2) A-C2/J-C2 RH rigid harness connectors
(3) P-C1/A-C90 Connectors for the power distribution panel
(4) P-C2/A-C91 Connectors for the power distribution panel
(5) G-C6/F-C2/F-C1/A-C92 Connectors for a RH Control panel
(6) C-C22 Primary ECM connector P2
(7) C-C15 Primary ECM connector P1
(8) C-C28 Secondary ECM connector P2
(9) C-C29 Secondary ECM connector P1
(10) G-C6/F-C2/F-C1/C-C17 Connectors for a LH Control panel
(11) TB-C1/C-C18 Customer connectors
(12) C-C2/J-C1 LH rigid harness connectors
(13) C-C1/E-C1 LH rigid harness connectors
Illustration 6 g01234146
Location of ECM connectors
Test Step 1. Inspect the Electrical Connectors and the Wiring for the Customer's Emergency StopNote: The 337-2 diagnostic code is generated because of a problem with the emergency stop inputs to the ECM from the customer connector. The two signals should be at a low potential or the two signals should be at a high potential. When the two signals are at a different potential from each other the diagnostic code is generated.
Turn the circuit breaker for the battery to the OFF position.
Turn the ECS to the OFF/RESET position.
Disconnect the following connectors.
C-C18 customer connector
P1 ECM connector
P2 ECM connector
Check for an open circuit in the wiring.
Install a wire jumper between terminal U and terminal T at the customer connector.
Measure the resistance between P1-23 and P1-28 on