941666 Volvo.Penta Sealing ring

Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
337-2 Remote Emergency Stop Switch erratic, intermittent, or incorrect The two inputs from the customer shutdown switch are in the opposite state. The code is logged. When the customer's emergency stop button is activated, the emergency stop inputs U and T to the primary ECM and the secondary ECM from the customer connector go high. The secondary ECM will recognize this change. The secondary ECM activates the output driver for the emergency shutdown system. The "Air Shutoff Switch (ASOS)" energizes the two air shutoff solenoids. The solenoids trip the air shutoff valves.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 one 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" keep the coils of relay "R2" and relay "R2A" energized. When relays "R2" and "R2A" are energized, power is removed from the primary ECM and the secondary ECM. The primary ECM and the secondary ECM will power down. The injection signals to the injector solenoids will stop.The contact of relay "R3A" also supplies 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" and to terminal 2 of the diode assembly. The "ASOS" energizes the two air shutoff solenoids. The solenoids trip the air shutoff valves. The 2.5 second time limit for activation of the "ASOS" 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 primary ECM and to the secondary ECM. The signal notifies the primary ECM and the secondary ECM that the air shutoff valves are closed. The primary ECM and the secondary 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.In order to start the engine after an emergency stop condition, the ECS must be turned to the OFF/RESET position. This resets the ECM and the air shutoff timer. In addition to turning the ECS to the OFF/RESET position, the operator must manually open the air shutoff valves before starting the engine.
Illustration 1 g01322358
Typical example
Illustration 2 g01323905
P1 ECM connector
(P1-23) "E-Stop 1"
(P1-28) "E-Stop 2"
Illustration 3 g01324224
P2 ECM connector
(P2-13) Drive for the air shutoff
Illustration 4 g01323796
Terminal locations for the TB-C1/C-C18 customer connector
(Terminal U) "E-Stop 1"
(Terminal T) "E-Stop 2"
Illustration 5 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 6 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 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 primary ECM connector
P1 secondary ECM connector
P2 primary ECM connector
P2 secondary 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 the primary P1 ECM connector and on the secondary P1 ECM connector. Wiggle the harness while performing the resistance checks.
Remove the wire jumper.
Check for a short circuit in the wiring.
Measure the resistance between wire F715-BK(Black) and every wire on the following connectors.
C-C18 customer connector
P1 primary ECM connector
P1 secondary ECM connector
P2 primary ECM connector
P2 secondary ECM connector
Measure the resistance between wire F719-BK(Black) and every wire on the following connectors.
C-C18 customer connector
P1 primary ECM connector
P1 secondary ECM connector
P2 primary ECM connector
P2 secondary ECM connectorExpected Result:The resistance checks indicate a short circuit when the wire jumper is installed. The resistance checks indicate an open circuit when the wire jumper is removed.Results:
OK - The harness and wiring appear to be OK. Verify that the two input signals on terminal U and terminal T from the customer connector TB-C1 are at the same potential before proceeding. Proceed to Test Step 2.
Not OK -