Atmospheric Pressure Sensor (Option); P2228/4: Failure With Atmospheric Pressure Sensor (Low Voltage) - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

Atmospheric pressure sensor (option)

(1) P2228/4: Failure with Atmospheric Pressure Sensor (Low Voltage)

DTC P2228/4
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s);
3 - Flashing pattern of failure indicator
1. Key switch ON.
2. Sensor voltage 0.2 [V] or higher.
3. One flash followed by nine flashes.
Movement at Error occurrence
Error Mode [Run Under Restrictions]:
The engine continues to run with the atmospheric pressure unchanged from the pre-
error value.
Run restricted? Yes: The altitude compensation function is disabled.
Recovery No.
Conditions
Remarks
Estimation of Failure cause/Error condition
• The connector may not be properly connected.
• Wiring defect of the harness
The atmospheric pressure sensor's signal wires may be disconnected or short-circuited with GND.
•
The SENSOR 5V wire may be disconnected or short-circuited with GND.
•
The SENSOR GND wire may be short-circuited with POWER SUPPLY (*NOTE).
•
*NOTE) If the SENSOR GND wire is short-circuited with POWER SUPPLY, the E-ECU's power supply line fuse
10A might be blown.With this fuse blown, the E-ECU may fail to detect/indicate the error, and to store
the error history.
• The atmospheric pressure sensor may be faulty.
Sensor output defect by a disconnection of the atmospheric pressure sensor inner wiring or a sliding
•
resistance increase
• The E-ECU internal circuitry may be faulty.
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DTCs (Diagnostic Trouble Codes) General Description
Failure with Atmospheric Pressure Sensor (Low Voltage)
Check points
Harness
Atmospheric pressure sensor
TNV DI Service Manual