DTC P0193:00 [PCM (SKYACTIV-G 2.5T)]

id0102s8147800

DTC P0193:00	High fuel pressure sensor circuit high input
DETECTION CONDITION	• If the input voltage at the PCM terminal 1BO is more than 4.86 V for 5 s, the PCM determines that the high fuel pressure sensor circuit is high. 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	• Stops high pressure fuel pump control • Limits intake air amount
POSSIBLE CAUSE	• High fuel pressure sensor connector or terminals malfunction • PCM connector or terminals malfunction • High fuel pressure sensor malfunction • Short to power supply in wiring harness between high fuel pressure sensor terminal C and PCM terminal 1BO • Open circuit in wiring harness between the following terminals: ? High fuel pressure sensor terminal E—PCM terminal 1CI ? High fuel pressure sensor terminal C—PCM terminal 1BO ? High fuel pressure sensor terminal A—PCM terminal 1CN • 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	DETERMINE IF HIGH FUEL PRESSURE SENSOR OR WIRING HARNESS MALFUNCTION • Access the FUEL_PRES PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Verify the FUEL_PRES PID value. • Is the FUEL_PRES PID value 5 V or B+?	Yes	Go to Step 7.
3		No	Go to the next step.
4	INSPECT HIGH FUEL PRESSURE SENSOR CONNECTOR CONDITION • Switch the ignition off. • Disconnect the high fuel 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 10.
4		No	Go to the next step.
5	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 10.
5		No	Go to the next step.
6	INSPECT HIGH FUEL PRESSURE SENSOR • Reconnect all disconnected connectors. • Inspect the high fuel pressure sensor. (See HIGH FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-G 2.5T].) • Is there any malfunction?	Yes	Replace the fuel distributor, then go to Step 10. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
6		No	Go to Step 10.
7	DETERMINE IF HIGH FUEL PRESSURE SENSOR SIGNAL CIRCUIT OR HIGH FUEL PRESSURE SENSOR GROUND CIRCUIT MALFUNCTION • Switch the ignition off. • Disconnect the high fuel pressure sensor connector. • Access the FUEL_PRES PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Verify the FUEL_PRES PID value. • Is the FUEL_PRES PID value 5 V or B+?	Yes	Go to the next step.
7		No	Go to Step 9.
8	INSPECT HIGH FUEL PRESSURE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Verify that the high fuel pressure sensor connector is disconnected. • Switch the ignition off. • Disconnect the PCM connector. • Inspect for continuity between high fuel pressure sensor terminal C (wiring harness-side) and PCM terminal 1BO (wiring harness-side). • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between high fuel pressure sensor terminal C and PCM terminal 1BO. 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 10.
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between high fuel pressure sensor terminal C and PCM terminal 1BO. 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 10.
9	INSPECT HIGH FUEL PRESSURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the high fuel pressure sensor connector is disconnected. • Switch the ignition off. • Disconnect the PCM connector. • Inspect for continuity between the following terminals (wiring harness-side): ? High fuel pressure sensor terminal E—PCM terminal 1CI ? High fuel pressure sensor terminal A—PCM terminal 1CN • Is there continuity?	Yes	Replace the fuel distributor, then go to the next step. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • High fuel pressure sensor terminal E—PCM terminal 1CI • High fuel pressure sensor terminal A—PCM terminal 1CN 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 the next step.
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.5T)].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.5T)].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].) Go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
11		No	DTC troubleshooting completed.