Dtc P0192 - Mazda Mazda6 Workshop Manual Supplement

DTC P0192

DTC P0192 Fuel pressure sensor circuit low input
• PCM monitors input voltage from fuel pressure sensor while engine is running. If input voltage from fuel
DETECTION
CONDITION pressure sensor is below 0.4 V, PCM determines fuel pressure sensor circuit low input.
• Fuel pressure sensor malfunction
• Connector or terminal malfunction
• Short to GND in wiring between fuel pressure sensor terminal C and PCM terminal 90
POSSIBLE
• Open circuit in wiring between fuel pressure sensor terminal C and PCM terminal 90
CAUSE
• Short to GND in wiring between fuel pressure sensor terminal B and PCM terminal 61
• Fuel pressure sensor signal and GND circuits short each other
• PCM malfunction
FUEL PRESSURE SENSOR
FUEL PRESSURE SENSOR
HARNESS SIDE CONNECTOR
C
Diagnostic procedure
STEP
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related repair information available?
2 INSPECT POOR CONNECTION OF FUEL
PRESSURE SENSOR CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
3 INSPECT FUEL PRESSURE SENSOR SIGNAL
CIRCUIT FOR SHORT TO GND
• Turn engine switch to OFF.
• Inspect continuity between fuel pressure
sensor terminal C and body GND.
• Is there continuity?
4 INSPECT FUEL PRESSURE SENSOR POWER
CIRCUIT FOR OPEN
• Turn engine switch to ON. (Engine OFF)
• Inspect voltage at fuel pressure sensor
terminal C (harness side).
• Is voltage below 1.0 V?
ON-BOARD DIAGNOSTIC
3
C
5
B
A
B A
INSPECTION
PCM
8
4
90
6 8
61
6
8
91
PCM
HARNESS SIDE CONNECTOR
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
Yes Repair or replace suspected terminal, go to Step 9.
No Go to next step.
Yes Repair or replace harness for short to GND, go to Step 9.
No Go to next step.
Yes Repair or replace harness for open, go to Step 9.
No Go to next step.
A6E407001082222
61
91 90
ACTION
F2–125
F2