Backup Alarm Relay
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| Illustration 1 | g00392599 |
Backup Alarm Relay | |
The relay for the backup alarm is an output of the ECM. The relay connects to the connector contact J2-37. The relay controls the backup alarm. The backup alarm alerts personnel that the machine is backing up. When the operator selects REVERSE, the ECM sends a +battery signal to the relay. When the relay is activated, +battery voltage is applied to the backup alarm.
The relay has five terminals. The terminal "85" receives the +battery signal from J2-37 from the ECM. The terminal "86" is connected to frame ground through J2-3 of the ECM. The terminal "30" connects to a +battery source. The terminal "87" connects to the backup alarm. The terminal "87a" is not used.
The ECM records diagnostic codes that occur with the backup alarm signal as a CID 0144.
Secondary Steering Relay
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| Illustration 2 | g00392599 |
Secondary Steering Relay | |
The relay for the secondary steering is an output of the ECM. The relay connects to connector contact. J1-10. The relay controls the secondary steering motor. The secondary steering system allows the operator to have steering when the primary steering has low operating pressure. When the primary power steering has low pressure the pressure sensor tells the ECM. The ECM then sends a signal to the relay. When the relay is activated, +battery voltage is applied to the secondary steering pump.
The relay has five terminals. The terminal "85" receives the output signal from J1-10 from the ECM. The terminal "86" is connected to frame ground through J1-7 of the ECM. The terminal "30" connects to a +battery source. The terminal "87" connects to the switch for manual operation of the relay for secondary steering. The terminal "87a" is not used.
The ECM records diagnostic codes that occur with the secondary steering signal as a CID 0420.
Start Relay
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| Illustration 3 | g00392624 |
Start Relay | |
The start relay is an output of the ECM. The relay connects to connector contact J1-8. The relay turns the start solenoid on and off. The start solenoid then controls the starting motor. After the operator turns the key start switch to the START position and the ECM decides that all starting conditions are satisfied. The ECM will then activate the relay with a +battery signal. The ECM activates the relay when two conditions have been met. The operator must place the transmission in NEUTRAL and the operator must apply the parking brake.
The relay has two terminals and a connector with two contacts. The connector contact 2 of the relay receives the +battery signal from J1-8 of the ECM. The connector contact 1 of the relay is connected to the frame ground. This connection is made through the solenoid return of the ECM J1-7. One relay terminal connects to a +battery source of the machine electrical system. The other relay terminal connects to the start solenoid.
The ECM records diagnostic codes that occur with the start relay as a CID 0444.