Mazda CX-7 2007 Workshop Manual page 10

Using the DTC troubleshooting flow
• DTC troubleshooting flow shows diagnostic procedures, inspection methods, and proper action to take for each
DTC.
DTC P0103
DTC PO103
DETECTION
CONDITION
POSSIBLE
CAUSE
describes
possible
POSSIBLE
CAUSE
point(s) of
malfunction
Indicates the
inspection step
No. to be
performed
(01 and 05
section)
STEP shows
the order of
troubleshooting
Diagnostic procedure
STEP
VERIFY FREEZE FRAME DATA HAS BEEN
1
RECORDED
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
3
VERIFY CURRENT INPUT SIGNAL STATUS IS
INSPECTION
CONCERN INTERMITTENT OR CONSTANT
describes the
method to
quickly
4 INSPECT POOR CONNECTION OF MAF
determine the
SENSOR CONNECTOR
malfunctioning
part(s).
00-00–8
GENERAL INFORMATION
TROUBLE CONDITION
MAF circuit high input
PCM monitors input voltage from TP sensor after ignition key is turned on. If input voltage at PCM terminal 68 is
above 8.25 V, PCM determines that TP circuit has malfunction.
Diagnostic support note
This is a continuous monitor (CCM).
MIL illuminates if PCM detects the above malfunction during first drive cycle. Therefore,
PENDING CODE is not available.
FREEZE FRAME DATE is available.
DTC is stored in the PCM memory.
MAF sensor malfunction
Connector or terminal malfunction
Open circuit in wiring between MAF sensor terminal D and PCM terminal 36
Open circuit in MAF sensor ground circuit
FROM
MAIN RELAY
TERMINAL D
MAF SENSOR
4
B
4 5
E
4
7
D
MAF SENSOR
HARNESS SIDE CONNECTOR
E D C B A
INSPECTION
Has FREEZE FRAME DATA been recorded?
Are related Service Bulletins and/or on-line
repair information available?
Connect diagnostic tool to DLC-2.
Start engine.
Access MAF V PID using diagnostic tool.
Is MAF V PID within 0.2 - 8.3 V?
Turn ignition key to OFF.
Disconnect MAF sensor connector.
Check for poor connection (damaged, pulled-
out terminals, corrosion etc.).
Are there any malfunctions?
PCM
6
88
6
36
PCM
HARNESS SIDE CONNECTOR
1P
ACTION
Yes Go to next step.
No Record FREEZE FRAME DATA on repair order, then go
to next step.
Yes
Perform repair or diagnosis according to available repair
information.
If vehicle is not repaired, then go to next step.
No Go to next step.
Yes
Intermittent concern is existing. Go to INTERMITTENT
CONCERNS TROUBLESHOOTING procedure.
(See 01-03-33 INTERMITTENT CONCERN
TROUBLESHOOTING)
No Go to next step.
Repair or replace terminals, then go to Step 8.
Yes
DETECTION CONDITION
describes the condition
under which the DTC is
detected.
Indicates the
circuit to be
inspected
(01 and 05
section)
Indicates the
connector
related to the
inspection
ACTION
describes the
appropriate
action to be taken
according to
the result
(Yes/No) of the
INSPECTION.
Reference
item(s) to
perform
ACTION.
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