4358 Mercruiser VALUE, CHOKE-CHOKE SHAFT

Table 1
Diagnostic Trouble Codes for the Engine Temperature Sensors
J1939 Code Description Notes
110-3 Engine Coolant Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the engine coolant temperature sensor is greater than 4.85 VDC for at least 1 second.
The engine has been running for at least 3 minutes.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled.
The engine may show the following symptoms:
Poor stability
Poor cold running
White smoke
110-4 Engine Coolant Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the engine coolant temperature sensor is less than 0.08 VDC for at least 1 second.
The keyswitch has been ON for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled.
The engine may show the following symptoms:
Poor stability
Poor cold running
White smoke
172-3 Engine Air Inlet Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the air intake temperature sensor is greater than 4.85 VDC for at least 0.5 seconds.
The engine is running.
The warning lamp will come on.
172-4 Engine Air Inlet Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the air intake temperature sensor is less than 0.08 VDC for at least 0.5 seconds.
The engine is running.
The warning lamp will come on.
3241-3 Exhaust Gas Temperature 1 : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the DPF outlet temperature sensor is greater than 5 VDC for at least 1 second.
The keyswitch is on for at least 2 seconds.
The coolant temperature is at least 70° C (158° F).
The warning lamp will flash.
The engine will be derated.
3241-4 Exhaust Gas Temperature 1 : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the DPF outlet temperature sensor is less than 0.05 VDC for at least 1 second.
The keyswitch is on for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
3242-3 Aftertreatment #1 DPF Intake Gas Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the DPF intake temperature sensor is greater than 5 VDC for at least 1 second.
The keyswitch is on for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
3242-4 Aftertreatment #1 DPF Intake Gas Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the DPF intake temperature sensor is less than 0.05 VDC for at least 1 second.
The keyswitch is on for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled.
4765-3 Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the Diesel Oxidation Catalyst (DOC) intake temperature sensor is greater than 5 VDC for at least 1 second.
The keyswitch is ON for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled.
4765-4 Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the DOC intake temperature sensor is less than 0.05 VDC for at least 1 second.
The keyswitch is ON for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled.
5487-3 Aftertreatment 1 Burner Unit Combustion Chamber Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the Aftertreatment Regeneration Device (ARD) combustion temperature sensor is greater than 5 VDC for at least 1 second.
The keyswitch is ON for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled.
5487-4 Aftertreatment 1 Burner Unit Combustion Chamber Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the ARD combustion temperature sensor is less than 0.05 VDC for at least 1 second.
The keyswitch is ON for at least 2 seconds.
The warning lamp will flash.
The engine will be derated.
DPF regeneration will be disabled. This procedure covers open circuit diagnostic codes and short circuit diagnostic codes that are associated with the following sensors:
Coolant temperature sensor
Inlet air temperature sensor
DPF outlet temperature sensor
DPF intake temperature sensor
DOC intake temperature sensor
ARD combustion temperature sensorThe following background information is related to this procedure:The troubleshooting procedures for the diagnostic codes of each temperature sensor are identical. The temperature sensors have two terminals. The signal line is connected to each sensor connector terminal 2. Terminal 1 is the return line. The signal voltage from terminal 1 of each sensor is supplied to the appropriate terminal in the P2/J2 connector or the P1/J1 connector.Pull-up VoltageThe ECM continuously outputs a pull-up voltage on the circuit for the sensor signal wire. The ECM uses this pull-up voltage in order to detect an open in the signal circuit. When the ECM detects a voltage above a threshold on the signal circuit, an open circuit diagnostic code (XXXX-3) is generated for the sensor.If the sensor is disconnected, pull-up voltage at the connector indicates that the wires are not open or shorted to ground. If the sensor is disconnected, the absence of pull-up voltage indicates an open in the signal wire or a short to ground. If the sensor is disconnected and the voltage is different from pull-up voltage, the signal wire is shorted to another wire in the harness.
Illustration 1 g03320458
Schematic for the engine temperature sensors
Illustration 2 g03320505
P2 pin locations for the temperature sensors
(6) Coolant temperature sensor signal
(7) Air intake temperature sensor signal
(14) DPF intake temperature sensor signal
(15) DOC intake temperature sensor signal
(26) Coolant temperature sensor ground
(27) Air intake temperature sensor ground
(34) DPF intake temperature sensor ground
(35) DOC intake temperature sensor ground
(54) ARD combustion temperature sensor ground
(55) DPF outlet temperature sensor ground
(74) ARD combustion temperature sensor signal
(75) DPF outlet temperature sensor signal Test Step 1. Verify All Active Diagnostic Codes
Connect the electronic service tool to the diagnostic connector.
Turn the keyswitch to the ON position. Note: Wait at least 30 seconds for activation of the diagnostic codes.
Use the electronic service tool in order to verify if any of the diagnostic codes that are listed