Dtc P0107 - Mazda Mazda6 Workshop Manual Supplement

DTC P0107

DTC P0107 Boost sensor circuit low input
• PCM monitors input voltage from boost sensor while engine is running. If input voltage from boost sensor is
DETECTION
below 1.9 V when engine speed is 2,400 rpm or above and accelerator opening angle is 50% or above,
CONDITION
PCM determines boost sensor circuit low input.
• Boost sensor malfunction
• Connector or terminal malfunction
• Short to GND in wiring between boost sensor terminal C and PCM terminal 90
POSSIBLE
• Open circuit in wiring between boost sensor terminal C and PCM terminal 90
CAUSE
• Short to GND in wiring between boost sensor terminal B and PCM terminal 36
• Boost sensor signal and GND circuits short each other
• PCM malfunction
BOOST SENSOR
BOOST SENSOR
HARNESS SIDE CONNECTOR
C
Diagnostic procedure
STEP
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform "DTC Confirmation Procedure".
(See F2–85 DTC CONFIRMATION
PROCEDURE)
• Is same DTC present during KOEO or KOER
self-test?
2 INSPECT POOR CONNECTION OF BOOST
SENSOR CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
3 INSPECT BOOST SENSOR SIGNAL CIRCUIT
FOR SHORT TO GND
• Turn engine switch to OFF.
• Inspect continuity between boost sensor
terminal C and body GND.
• Is there continuity?
ON-BOARD DIAGNOSTIC
3
C
5
B
A
A
B
INSPECTION
PCM
4
8
90
6
8
36
6
8
91
PCM
HARNESS SIDE CONNECTOR
Yes Go to next step.
No Intermittent concern exists. Go to "Intermittent Concern
Troubleshooting".
(See F2–227 INTERMITTENT CONCERN
TROUBLESHOOTING)
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.
A6E407001082210
91 90
ACTION
F2–103
F2