ADAPTER 6J1218 - Caterpillar

ENGINE CONTROL GROUP (ECG)
RELAY PRINTED CIRCUIT SOCKET BOARD Problems
1. ENGINE WILL NOT CRANK.2. ENGINE OVERCRANK DOES NOT OPERATE.3. ENGINE WILL NOT TERMINATE CRANKING.4. ENGINE RUNS BUT GOVERNOR SWITCH WILL NOT CHANGE ENGINE SPEED.5. NO CONTROL VOLTAGE TO 2301 GOVERNOR.6. ENGINE SPEED CONTROL (2301 GOVERNOR) WILL NOT CHANGE ENGINE SPEED.7. NO VOLTAGE TO 2301 GOVERNOR.8. ENGINE DOES NOT STOP WHEN OIL PRESSURE IS TOO LOW.9. ENGINE DOES NOT STOP WHEN COOLANT TEMPERATURE IS TOO HIGH.10. ENGINE DOES NOT STOP WHEN ENGINE SPEED (RPM) IS TOO FAST.11. NOT NORMAL ENGINE CONDITION LIGHT IS NOT ON AFTER NOT NORMAL CONDITION STOPPED THE ENGINE.12. ENGINE WILL NOT STOP WHEN AUTOMATIC CONTROL SWITCH (ACS) IS MOVED TO THE STOP POSITION.13. ENGINE WILL NOT STOP WHEN AUTOMATIC CONTROL SWITCH (ACS) IS MOVED TO THE OFF/RESET POSITION.14. ENGINE WILL NOT AUTOMATICALLY START.15. ENGINE DOES NOT COOL ENOUGH BEFORE IT IS AUTOMATICALLY STOPPED.16. BATTERY DOES NOT GET CHARGED WHEN ENGINE IS RUNNING.Engine Will Not Crank. Engine Overcrank Does Not Operate. Engine Will Not Terminate Cranking. Engine Runs But Governor Switch Will Not Change Engine Speed. No Control Voltage To 2301 Governor. Engine Speed Control (2301 Governor) Will Not Change Engine Speed. No Voltage To 2301 Governor Actuator. - (Load Sharing Governor Control Option 6F) Engine Does Not Stop When Oil Pressure Is Too Low. Engine Does Not Stop When Coolant Temperature Is Too High. Engine Does Not Stop When Engine Speed (RPM) Is Too Fast. Not Normal Engine Condition Light Is Not On After Not Normal Condition Stopped The Engine. Engine Will Not Stop When Automatic Control Switch (ACS) Is Moved To The Stop Position. Engine Will Not Stop When Automatic Control Switch (ACS) Is Moved To The Off/Reset Position. Engine Will Not Automatically Start. Engine Does Not Cool Enough When It Is Automatically Stopped. Battery Does Not Get Charged When Engine Is Running. Relay Test
Needed: Circuit or continuity tester. Source of DC voltage (no less than 75% of voltage on relay cover).
RELAY
1. Cover. 2. Blades. 3. Contact (three).1. Remove the relay from the engine control group (ECG) board.2. There must be a circuit (continuity) for normally closed (NC) contacts (2) between blades 7 and 1, 8 and 2, 9 and 3. If there is no continuity between any of these pairs of blades, the relay is bad.3. There must be no continuity (circuit) between blades 7 and 4, 8 and 5, 9 and 6. If there is continuity between any of these pairs of blades, the relay is bad.
RELAY BLADES AND CONTACTS (SCHEMATIC)4. Put DC voltage, amount of volts shown on relay cover (1), between blades A and B to activate the coil and move (switch) the contacts.5. With coil (A to B) activated, there must be continuity between blades 7 and 4, 8 and 5, 9 and 6. If there is no continuity between any of these pairs of blades, the relay is bad.Automatic Control Switch (ACS) Test
The automatic control switch has 17 wire terminals. Each terminal has a number that is the