3176C and 3196 Marine Engines Caterpillar

Diagnostic Flash Code Retrieval

Usage:

3196 2XR

"Diagnostic" Lamp

Use the "DIAGNOSTIC" Lamp or a Caterpillar electronic service tool to determine the diagnostic flash code.

Use the following procedure to retrieve the diagnostic codes if the engine is equipped with a "DIAGNOSTIC" lamp:

Turn the ignition key to the ON position. The engine does not need to be started in order to view codes. The engine does not need to be running while the ignition switch is in the ON position.
The "DIAGNOSTIC" lamp flashes on and off at five second intervals.
- When the ignition key is in the ON position, the lamp is checked for proper operation. Active codes are displayed at this time. Code 34 will not be displayed.
Note: The "DIAGNOSTIC" lamp will flash for five seconds. The lamp will stay on if there is an active diagnostic code.

The diagnostic codes will always be flashed. There is no toggle switch that will shut off the lamp.

The "DIAGNOSTIC" lamp will flash in order to indicate a two-digit code. The sequence of flashes represents the system diagnostic message. Each digit of the two-digit code is determined by counting the number of flashes. The lamp flashes at a rate of two times per second. The lamp will pause for one second between digits. The lamp will pause for two seconds between codes.

Table 1 indicates the potential effect on the engine performance with active flash codes. Table 1 also forms a list of Electronic diagnostic codes and descriptions.

For further information or assistance for repairs, consult an authorized Caterpillar dealer.

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Table 1
	Diagnostic Flash Codes for 3176C and 3196 Marine Engines
Diagnostic Flash Code		Effect On Engine Performance			Suggested Action by the Operator
Diagnostic Flash Code		Engine Misfire	Low Power	Reduced Engine Speed	Shut down the Engine ⁽¹⁾	Service ⁽²⁾	Schedule Service for the Engine. ⁽³⁾
13	Fault of the Fuel Temperature Sensor ⁽⁴⁾						X
17	Battery Voltage Below Normal ⁽⁴⁾						X
21	Sensor Supply Voltage Above Normal or Below Normal ⁽⁴⁾		X				X
24	Oil Pressure Sensor Fault ⁽⁴⁾						X
25	Fault of the Sensor for the Inlet Manifold Air Pressure ⁽⁵⁾		X				X
26	Atmospheric Pressure Sensor Fault ⁽⁴⁾						X
27	Coolant Temperature Sensor Fault ⁽⁴⁾						X
28	Check The Adjustment of the Throttle Position Sensor.						X
32	Throttle Position Sensor Fault			X		X
34	Engine RPM Signal Fault	X		X		X
35	Engine Overspeed Warning						X
38	Fault of the Sensor for the Inlet Manifold Air Temperature ⁽⁴⁾						X
42	Check The Calibration of the Timing Sensor.		X				X
46	Low Oil Pressure Warning		X	X	X	X
51	Intermittent Battery Power to the ECM	X	X			X
52	Personality Module Fault	X	X	X		X
53	ECM Fault	X	X	X		X
56	The Following Parameters Must Be Checked: Customer and System		X	X			X
59	Incorrect Engine Software	X	X	X			X
61	High Coolant Temperature Warning		X			X
62	Low Coolant Level Warning					X
63	Low Fuel Pressure					X	X
64	Warning for High Inlet Manifold Air Temperature						X
65	Warning for High Fuel Temperature						X
67	Fault of the Marine Transmission Oil Temperature						X
72	Fault of Cylinder 1 or Cylinder 2	X	X			X
73	Fault of Cylinder 3 or Cylinder 4	X	X			X
74	Fault of Cylinder 5 or Cylinder 6	X	X			X
81	Warning for High Marine Transmission Oil Temperature					X
86	Warning for High Marine Transmission Oil Pressure					X

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^( 1 )	Operate the engine cautiously. Get immediate service. Severe engine damage may result.
^( 2 )	The operator should go to the nearest location for service.
^( 3 )	The operator should investigate the problem at a convenient time.
^( 4 )	The Diagnostic Flash Codes reduce the effectiveness of the Engine Monitoring feature.
^( 5 )	These Diagnostic Flash Codes may affect the system only under specific environmental conditions such as engine start-up at cold temperatures, etc.