Upshift, Downshift, and Lockup Solenoids
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| Illustration 1 | g00388352 |
Upshift, Downshift, and Lockup Solenoids | |
The upshift and downshift solenoids are outputs of the ECM. The upshift solenoid connects to the ECM at connector contact J1-12. The downshift solenoid connects to the ECM at connector contact J1-18. The upshift solenoid and the downshift solenoid are used to shift the transmission. When the ECM decides to shift, the corresponding solenoid is activated with +battery voltage until the shift occurs. The upshift solenoid and the downshift solenoid control the flow of oil that turns the rotary actuator. The rotary actuator is in the transmission hydraulic control system. Movement (turning) of the rotary actuator shifts the transmission. The upshift solenoid and the downshift solenoid are located on the transmission hydraulic controls at the top of the transmission.
The lockup solenoid is an output of the ECM. The lockup solenoid connects to contact J1-11. The lockup solenoid electrically controls the direct drive function. The ECM activates the lockup solenoid with +battery voltage and the lockup solenoid is deactivated when +battery voltage is not present. The lockup solenoid controls the flow of the oil to the lockup clutch valve. Direct drive is used in the upper transmission speeds. Torque converter drive is used in the lower transmission speeds. The lockup solenoid is located on the lockup clutch valve at the torque converter.
The solenoids have a connector with two contacts. The solenoid receives +battery voltage from the ECM through Contact 1. Contact 2 connects to ground through the ECM at J1-7.
The ECM records diagnostic codes that occur with the upshift solenoid, the downshift solenoid, and the lockup solenoids. A diagnostic code with the upshift solenoid is recorded as a CID 0707. A diagnostic code with the downshift solenoid is recorded as a CID 0708. A diagnostic code with the lockup solenoid is recorded as a CID 0709.
Interaxle Lock Solenoid
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| Illustration 2 | g00388232 |
Interaxle Lock Solenoid | |
The interaxle lock solenoid is an output of the ECM. The interaxle lock solenoid connects to the ECM at connector contact J2-1. The interaxle lock solenoid locks the axle together for maximum traction. After the operator's request, the ECM evaluates several parameters in order to determine if locking the axle is safe. If the parameters are correct the ECM activates the interaxle solenoid.
The solenoids have a connector with two contacts. The solenoid receives +battery power from the ECM through Contact 1. Contact 2 connects to ground through the ECM at J2-3.
The ECM records diagnostic codes that occur with the interaxle solenoid. A diagnostic code with the interaxle lock solenoid is recorded as a CID 0971.
Raise and Lower Solenoid
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| Illustration 3 | g00390454 |
Raise and Lower Solenoid | |
The bed raise solenoid and the bed lower solenoid are an output of the ECM. The bed raise solenoid connects to the ECM at connector contact J2-13. The lower solenoid connects to the ECM at connector contact J2-19. The bed raise solenoid and the bed lower solenoid controls the movement of the bed.
After the operator's request, the ECM evaluates several parameters in order to determine if moving the bed is safe. If the parameters are correct the ECM activates the bed raise solenoid or the bed lower solenoid.
The solenoids have a connector with two contacts. The solenoid receives +battery power from the ECM through Contact 1. Contact 2 connects to ground through the ECM at J2-3.
The ECM records diagnostic codes that occur with the bed raise solenoid. A diagnostic code with the bed raise solenoid is recorded as a CID 0724. A diagnostic code with the bed lower solenoid is recorded as a CID 0725.
Mid Rear Cross Lock Solenoid
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| Illustration 4 | g00388232 |
Mid Rear Cross Lock Solenoid | |
The mid rear cross lock solenoid is an output of the ECM. The mid rear cross lock solenoid connects to the ECM at connector contact J2-8. The mid rear cross lock solenoid locks the rear axles together for maximum traction. After the operator's request, the ECM evaluates several parameters in order to determine if this action is safe. If the parameters are correct the ECM activates the mid rear cross lock solenoid.
The solenoids have a connector with two contacts. The solenoid receives +battery power from the ECM through Contact 1. Contact 2 connects to ground through the ECM at J2-3.
The ECM records diagnostic codes that occur with the mid rear cross lock solenoid. A diagnostic code with the mid rear cross lock solenoid is recorded as a CID 0970.
Front Cross Lock Solenoid
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| Illustration 5 | g00388232 |
Front Cross Lock Solenoid | |
The front cross lock solenoid is an output of the ECM. The front cross lock solenoid connects to the ECM at connector contact J2-2. The front cross lock solenoid locks the front axle together for maximum traction. After the operator's request, the ECM evaluates several parameters in order to determine if this action is safe. If the parameters are correct the ECM activates the front cross lock solenoid.
The solenoids have a connector with two contacts. The solenoid receives +battery power from the ECM through Contact 1. Contact 2 connects to ground through the ECM at J2-3.
The ECM records diagnostic codes that occur with the front cross lock solenoid. A diagnostic code with the front cross lock solenoid is recorded as a CID 0969.
Park Brake Solenoid
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| Illustration 6 | g00388232 |
Park Brake Solenoid | |
The park brake solenoid is an output of the ECM. In order to deactivate the parking brake, the ECM sends a +battery signal to the parking brake solenoid. When the solenoid is energized the parking brake is NOT applied. Therefore, when the parking brake is NOT applied, the solenoid is ON.
The park brake solenoid electrically controls the parking brake. This prevents the machine from moving, after the machine has come to a stop.
The solenoid has a connector with two contacts. Contact 1 connects to the ECM at J1-4. Contact 2 connects to ground through the ECM at J1-7.
The ECM records diagnostic codes that occur with the park brake solenoid. A diagnostic code with the parking brake solenoid is recorded as a CID 0681.
ASBS Solenoid
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| Illustration 7 | g00388232 |
ASBS Solenoid | |
Note: The ASBS system is called the front service brake system.
The ASBS solenoid is an output of the ECM. The ECM sends a +battery signal to the ASBS solenoid in order to activate the front service brake system. When the ASBS solenoid is energized the front service brake system is applied. Therefore, when the ASBS is applied the ASBS solenoid is ON.
Note: Whenever the ASBS solenoid is active the differential lock relay is also activated and the differential lock solenoid is then energized. These solenoids are controlled by software.
The ASBS solenoid electrically controls the front brakes. The front brakes are used to help prevent movement of the machine while the parking brake is applied. The ASBS solenoid is located on the left side of the engine near the hydraulic tank.
The solenoid has a connector with two contacts. Contact 1 of the solenoid connects to the ECM at J1-17. Contact 2 connects to ground through the ECM at J1-7.
The ECM records diagnostic codes that occur with the ASBS solenoid as a CID 0722. While a diagnostic code is present in the ASBS circuit, the ECM does not allow the transmission to shift above first gear.