DTC P0523:00 [SKYACTIV-D 1.5]

id0102q2212900

DTC P0523:00

Engine oil pressure sensor circuit high input

DETECTION CONDITION

•  If the input voltage at the PCM terminal 1AB is more than 4.81 V for 2.5 s, the PCM determines that the engine oil temperature sensor circuit is high.

MONITORING CONDITIONS

―  Battery voltage: 8—20 V

―  0.5 s have elapsed after the ignition was switched ON (engine off or on)

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Limits the engine torque or the upper limit of the engine speed.

POSSIBLE CAUSE

•  Engine oil temperature sensor/engine oil pressure sensor connector or terminals malfunction

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between engine oil temperature sensor/engine oil pressure sensor terminal D and PCM terminal 1AB

•  Engine oil pressure sensor power supply circuit and signal circuit are shorted to each other

•  Open circuit in wiring harness between the following terminals:

―  Engine oil temperature sensor/engine oil pressure sensor terminal D—PCM terminal 1AB

―  Engine oil temperature sensor/engine oil pressure sensor terminal C—PCM terminal 1BV

•  Engine oil pressure sensor malfunction

•  PCM malfunction

DTC P0523:00	Engine oil pressure sensor circuit high input
DETECTION CONDITION	• If the input voltage at the PCM terminal 1AB is more than 4.81 V for 2.5 s, the PCM determines that the engine oil temperature sensor circuit is high. MONITORING CONDITIONS ― Battery voltage: 8—20 V ― 0.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Limits the engine torque or the upper limit of the engine speed.
POSSIBLE CAUSE	• Engine oil temperature sensor/engine oil pressure sensor connector or terminals malfunction • PCM connector or terminals malfunction • Short to power supply in wiring harness between engine oil temperature sensor/engine oil pressure sensor terminal D and PCM terminal 1AB • Engine oil pressure sensor power supply circuit and signal circuit are shorted to each other • Open circuit in wiring harness between the following terminals: ― Engine oil temperature sensor/engine oil pressure sensor terminal D—PCM terminal 1AB ― Engine oil temperature sensor/engine oil pressure sensor terminal C—PCM terminal 1BV • Engine oil pressure sensor malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data on the repair order.	—	Go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT ENGINE OIL TEMPERATURE SENSOR/ENGINE OIL PRESSURE SENSOR CONNECTOR CONDITION • Switch the ignition off. • Disconnect the engine oil temperature sensor/engine oil pressure sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
3		No	Go to the next step.
4	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
4		No	Go to the next step.
5	INSPECT ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the engine oil temperature sensor/engine oil pressure sensor and PCM connectors are disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the engine oil temperature sensor/engine oil pressure sensor terminal D (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between engine oil temperature sensor/engine oil pressure sensor terminal D and PCM terminal 1AB. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
6	INSPECT ENGINE OIL PRESSURE SENSOR POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER • Verify that the engine oil temperature sensor/engine oil pressure sensor and PCM connectors are disconnected. • Switch the ignition off. • Inspect for continuity between engine oil temperature sensor/engine oil pressure sensor terminals A and D (wiring harness-side). • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Engine oil temperature sensor/engine oil pressure sensor terminal A—PCM terminal 1BT • Engine oil temperature sensor/engine oil pressure sensor terminal D—PCM terminal 1AB If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to each other. Go to Step 9.
6		No	Go to the next step.
7	INSPECT ENGINE OIL PRESSURE SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the engine oil temperature sensor/engine oil pressure sensor and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Engine oil temperature sensor/engine oil pressure sensor terminal D—PCM terminal 1AB ― Engine oil temperature sensor/engine oil pressure sensor terminal C—PCM terminal 1BV • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Engine oil temperature sensor/engine oil pressure sensor terminal D—PCM terminal 1AB • Engine oil temperature sensor/engine oil pressure sensor terminal C—PCM terminal 1BV If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 9.
8	INSPECT ENGINE OIL PRESSURE SENSOR • Reconnect all disconnected connectors. • Inspect the engine oil pressure sensor. (See ENGINE OIL PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Replace the engine oil temperature sensor/engine oil pressure sensor, then go to the next step. (See ENGINE OIL TEMPERATURE SENSOR/ENGINE OIL PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
8		No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 1.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
10		No	DTC troubleshooting completed.