Mazda Mazda6 - Dtc P0102

ON-BOARD DIAGNOSTIC
F2–99
F2
DTC P0102
A6E407001082208
Diagnostic procedure
DTC P0102 MAF sensor circuit low input
DETECTION
CONDITION
• PCM monitors input voltage from MAF sensor while engine is running. If input voltage from MAF sensor is
below 0.2 V, PCM determines MAF sensor circuit low input.
POSSIBLE
CAUSE
• MAF sensor malfunction
• Connector or terminal malfunction
• Open circuit in wiring between PCM control relay terminal C and MAF/IAT sensor terminal A
• Short to GND in wiring between MAF/IAT sensor terminal C and PCM terminal 9
• MAF sensor signal and GND circuits short each other
• Open circuit in wiring between MAF/IAT sensor terminal C and PCM terminal 9
• PCM malfunction
STEP INSPECTION ACTION
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?
Yes Go to next step.
No Intermittent concern exists. Go to “Intermittent Concern
Troubleshooting”.
(See F2–227 INTERMITTENT CONCERN
TROUBLESHOOTING)
2 INSPECT POOR CONNECTION OF MAF
SENSOR CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
Yes Repair or replace suspected terminal, go to Step 9.
No Go to next step.
3 INSPECT MAF SENSOR POWER CIRCUIT FOR
OPEN
• Turn engine switch to ON. (Engine OFF)
• Inspect voltage at MAF/IAT sensor terminal A
(harness side).
• Is voltage below 1.0 V?
Yes Repair or replace harness for open, go to Step 9.
No Go to next step.
2
2
2
3
4
5
5
8
7
7
6
MAF SENSOR PCM
E
D
C
BA
9
14
9
14
A
C
B
PCM CONTROL RELAY
TERMINAL C
MAF SENSOR
HARNESS SIDE CONNECTOR
PCM
HARNESS SIDE CONNECTOR