C0.5 and C0.7 Industrial Engines Caterpillar

The multi-function lamp will flash a two or a three-digit code in a given sequence to show the flash code diagnostic massage. By counting the number of flashes in a given sequence, you can determine the flash code.

After the flash code as finished, the flash code sequence will continual to be repeated. If a second flash code has been activated, then the system will repeat both codes in the given sequence.

Four short flashes will indicate a flash code of 04. Three long flashes of one second each followed by one short flash will indicate a flash code of 31.

• APS ____________________Actuator Power Supply

• CPU ____________________Central Processing Unit (Engine controller)

• MAP ____________________Manifold Air Pressure

Table 1

Diagnostic Flash Codes
Flash Code	Diagnostic Description	Latched to Next Key Cycle	Engine Shut-down
04	Actuator Out Put Overcurrent	-	-
13	Oil Pressure Switch Issue	Yes	Yes
15	MPU Sensor Failure	-	Yes
17	Battery Voltage Over High Threshold	-	-
18	Battery Voltage Below Low Threshold	-	-
22	Air Pressure Sensor Out of Range	-	-
31	Engine Oil Pressure Low	-	Yes
32	Actuator Mechanically Stuck	-	Yes
33	Actuator Position Sensor Out of Range	-	Yes
40	Actuator Output Overcurrent	-	Yes
51	Internal Hardware Failure	-	Yes
52	Device Configuration Corrupted	-	Yes
53	Controller Internal Supply Dropout	-	-
54	(EEPROM) Read/Write Internal Hardware Failure	-	-
55	APS J1-J2 Pin Short to Ground	-	Yes
543	(Overspeed) engine speed Limit Exceeded	-	Yes

For more information contact your Cat dealer.