TP-5353 8/94 Controller Troubleshooting 5-3
Circuit Board Terminal Identification (TB1)
Terminal/Wire Description
1. 1 Ground -- Emergency Stop Relay (K4)
2. 1A Emergency Stop Relay (K4) Coil
3. 56 Air Damper Indicator
4. Open
5. 42A Battery Voltage (Fuse #1 Protected)
6. 2 Ground
7. 9 Crank Mode (open -- cyclic crank;
ground -- continuous crank)
8. 48 Emergency Stop Indicator
9. 3 Remote Start Ground
10. 4 Remote Start (Active Low*)
11. 26 Auxiliary Indicator
12. 12 Overcrank Indicator
13. 39 Overspeed Indicator
14. 38 Low Oil Pressure Indicator
15. 36 High Engine Temperature Indicator
16. 60 System Ready Indicator
17. 80 Not In Auto Indicator
18. 40 Prealarm High Engine Temperature Indicator
19. 41 Prealarm Low Oil Pressure Indicator
20. 32 Common Fault/Prealarm
21. 63 Low Fuel (Active Low*)
22. 61 Battery Charger Fault (Active Low*)
23. 62 Low Battery Volts (Active Low*)
24. 35 Low Water Temperature
P1 Connector Pins
Terminal Description
1. Output to K1 Relay (Crank Relay), Wire 71
2. Ground for Speed Sensor, Wire 2
3. Output to Safeguard Breaker Terminal and Water Level Switch,
Wire 70 (and K5 Relay if equipped with Electronic Governor)
4. Not Used
5. Ground (--), Wire N
6. Speed Sensor Shield Ground, Wire S2
7. Output to Fuel Solenoid (FS), Wire 70
8. Battery Positive to Speed Sensor, Wire 24
9. Input from Speed Sensor, Wire 16
10. Not Used
11. Not Used
12. Input from Battery Positive (14P)
13. Input from Auxiliary Delay Shutdown
14. Input from Water Level Switch, Wire 31
15. Input from Auxiliary Delay Shutdown
16. Input from Pre-High Engine Temperature Switch, Wire 40A
17. Input from Auxiliary Immediate (Overvoltage) Shutdown, Wire 30
18. Input from Air Damper, Wire 56 (200-1600 kW models with
Detroit Diesel engines only)
19. Output to K6 relay, Wire 57 (200-1600 kW models with Detroit
Diesel engines only)
20. Not Used
21. Input from High Engine Temperature Switch, Wire 34
22. Input from Low Oil Pressure Switch, Wire 13
23. Input from Pre Low Oil Pressure Switch, Wire 41A
24. Input from Low Water Temperature Switch, Wire 35A
P2 Connector Pins
Terminal Description
1. Output to Oil Pressure Sender, Wire 70
2. Input from Overvoltage Board, Wire 30
3. Input for AC Crank Disconnect and Instrumentation, Wire V7F
4. Air Damper Output (200-1600 kW models with Detroit Diesel
engines only), wire 56
5. Input for AC Crank Disconnect and instrumentation, Wire V0
6. Engine Ground, Wire 2
P3 Connector Pins
Terminal Description
1. Output to Emergency Stop Lamp, Wire 48
2. Output to Auxiliary Indicator, Wire 26
3. Output to Overcrank Indicator, Wire 12
4. Output to Overspeed Indicator, Wire 39
5. Output to Low Oil Pressure Indicator, Wire 38
6. Output to High Engine Temperature Indicator, Wire 36
7. Output to System Ready Indicator, Wire 60
8. Voltage (+) to Front Panel, Wire 24
9. Output to Not In Auto Indicator, Wire 80
10. Output to Pre High Engine Temperature Indicator, Wire 40
11. Output to Pre Low Oil Pressure Indicator, Wire 41
12. Output to Low Water Temperature Indicator, Wire 35
13. Output to Low Battery Volts Indicator, Wire 62
14. Output to Battery Charger Fault Indicator, Wire 61
15. Output to Low Fuel Indicator, Wire 63
16. Output to Common Alarm, Wire 32
17. Input from Generator Master Switch, RUN position, Wire 47
18. Input from Generator Master Switch, OFF/RESET position,
Wire 43
19. Input from Generator Master Switch, AUTO position, Wire 46
20. Ground (--), Front Panel, Wire 2
P4 Connector Pins
Terminal Description
1. Input to Emergency Stop Lamp, Wire 48
2. Input to Auxiliary Indicator, Wire 26
3. Input to Overcrank Indicator, Wire 12**
4. Output to Overspeed Indicator, Wire 39**
5. Input to Low Oil Pressure Indicator, Wire 38**
6. Input to High Engine Temperature Indicator, Wire 36**
7. Input to System Ready Indicator, Wire 60
8. Voltage (+) to Front Panel, Wire 24
9. Input to Not In Auto Indicator, Wire 80
10. Input to Pre-High Engine Temperature Indicator, Wire 40**
11. Input to Pre-Low Oil Pressure Indicator, Wire 41**
12. Input to Low Water Temperature Indicator, Wire 35**
13. Input to Low Battery Volts Indicator, Wire 62
14. Input to Battery Charger Fault Indicator, Wire 61
15. Input to Low Fuel Indicator, Wire 63**
16. Input to Common Alarm, Wire 32**
17. Output from Generator Master Switch, RUN position,
Wire 47
18. Output from Generator Master Switch, OFF/RESET position,
Wire 43
19. Output from Generator Master Switch, AUTO position, Wire 46
20. Ground (--), Front Panel
* Active low circuits may be checked for proper operation by placing ground on terminals so designated.
** Common alarm triggered by High Engine Temperature, High Engine Temperature Prealarm, Low Oil Pressure, Low Oil Pressure Prealarm,
Low Water Temperature, Overcrank, Overspeed, Low Fuel, and Auxiliary Faults.
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