ROOF 1739561 - Caterpillar

Table 1
J1939 Code and Description Comments
430-5
Engine Starter Motor Solenoid : Current Below Normal This code indicates that there is a problem with the starter motor solenoid and/or the electrical circuit on the ECM.
430-6
Engine Starter Motor Solenoid : Current Above Normal This code indicates that there is a problem with the starter motor solenoid and/or the electrical circuit on the ECM.
632-5
Engine Fuel Shutoff Valve #1 : Current Below Normal This code indicates that there is a problem with the Gas Shutoff Valve ( GSOV) and/or the electrical circuit on the ECM.
632-6
Engine Fuel Shutoff Valve #1 : Current Above Normal This code indicates that there is a problem with the Gas Shutoff Valve ( GSOV) and/or the electrical circuit on the ECM.
677-5
Engine Starter Motor Relay : Current Below Normal This code indicates that there is a problem with the starter motor relay and/or the electrical circuit on the ECM.
677-6
Engine Starter Motor Relay : Current Above Normal This code indicates that there is a problem with the starter motor relay and/or the electrical circuit on the ECM.
2634-5
Power Relay : Current Below Normal This code indicates that there is a problem with the relay and/or electrical circuit from the ECM.
Relay powers the following:
- Fuel actuator
- Throttle actuator
- Turbo compressor bypass actuator
2634-6
Power Relay : Current Above Normal This code indicates that there is a problem with the relay and/or electrical circuit from the ECM.
Relay powers the following:
- Fuel actuator
- Throttle actuator
- Turbo compressor bypass actuator
4210-5
Engine Pre-lube Drive : Current Below Normal This code indicates that there is a problem with the prelubrication relay and/or the electrical circuit on the ECM.
4210-6
Engine Pre-lube Drive : Current Above Normal This code indicates that there is a problem with the prelubrication relay and/or the electrical circuit on the ECM.
4245-5
Fuel Energy Content : Current Below Normal This code indicates that there is a problem with the input from the fuel quality sensor.
4245-6
Fuel Energy Content : Current Above Normal This code indicates that there is a problem with the input from the fuel quality sensor. Electrical Checkouts on the Cat® Electronic Technician (CatET)
Table 2
Component Electrical Checkout
Engine Starter Solenoid Attempt to start the engine, or use the starting system #1 and/or starting system #2 manual override activation in the diagnostic test section of Cat ET.
Engine Starter Motor Relay Attempt to start the engine.
The engine starter motor relays are used upon activation of the manual start switch.
Prelubrication System Relay Prelubrication Relay Override
Fuel Actuator Power Supply Relay Turn main disconnect switch to the "ON" position.
Gas Shutoff Valve #1 Attempt to start the engine.
Once the ECM attempts to energize the relay coil, the code will become active.
Illustration 1 g03703200
For the complete circuit details, refer to the full schematic.
Illustration 2 g03703706
For the complete circuit details, refer to the full schematic.
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -5 code is active or logged.
Proceed to Test Step 2.
Result: A -6 code is active or logged.
Proceed to Test