0391457 JOHNSON EXHAUST HOUSING ASSY.

Table 1
J1939 Code and Description Comments
100-3
Engine Oil Pressure : Voltage Above Normal The Electronic Control Module (ECM) detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
100-4
Engine Oil Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
107-3
Engine Air Filter 1 Differential Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
107-4
Engine Air Filter 1 Differential Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
108-3
Barometric Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
108-4
Barometric Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
159-3
Engine Gas Supply Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
159-4
Engine Gas Supply Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
1208-3
Engine Pre-filter Oil Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
1208-4
Engine Pre-filter Oil Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
1390-3
Engine Fuel Valve #1 Inlet Absolute Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
1390-4
Engine Fuel Valve #1 Inlet Absolute Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
3466-3
Engine Fuel Valve #2 Inlet Absolute Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
3466-4
Engine Fuel Valve #2 Inlet Absolute Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
4817-3
Engine Intake Manifold #1 Absolute Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
4817-4
Engine Intake Manifold #1 Absolute Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
6571-3
Engine Main Chamber Fuel Absolute Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
6571-4
Engine Main Chamber Fuel Absolute Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
7063-3
Engine Gaseous Fuel Supply Pressure #2 : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged.
7063-4
Engine Gaseous Fuel Supply Pressure #2 : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The value of the parameter is set to a default value.
The code is logged. The ECM continuously creates a pull-up voltage on the signal wire for each sensor. The ECM uses this pull-up voltage to detect a problem in the signal circuit. When the ECM detects voltage that is above a threshold on the signal wire, the ECM activates a high voltage -3 diagnostic . When the ECM detects voltage that is below a threshold on the signal wire, the ECM activates a low voltage -4 diagnostic .Note: There may be a delay of 30 seconds in order for Cat® Electronic Technician (ET) to display an active diagnostic . When you check for a diagnostic , be sure to wait at least 30 seconds.
Table 2
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 -3 code is active.
Proceed to Test Step 2.
Result: A -4 code is active.
Proceed to Test Step 3.
2. Create a Short at