Mazda 3 Workshop Manual page 438

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DTC P2507
DETECTION
CONDITION
POSSIBLE CAUSE
Diagnostic procedure
STEP INSPECTION
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
• Has FREEZE FRAME PID DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
• Check for related service repair
2
information availability.
• Is any related repair information available?
3 INSPECT EEC FUSE
Downloaded from
• The PCM monitors the voltage of back-up battery positive terminal at PCM
terminal 1BA. If the PCM detected battery positive terminal voltage below
2.5 V for 2 s, the PCM determines that the backup voltage circuit has
malfunction.
• Melt down EEC fuse
• Open circuit in wiring between EEC fuse and PCM terminal 1BA
• Short to ground between EEC fuse and PCM terminal 1BA
• Poor connection of PCM connector
• PCM malfunction
Yes Go to the next step.
No
Yes
No Go to the next step.
Yes Go to step 6.
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PCM B+ voltage low
ACTION
Record FREEZE FRAME PID DATA on repair
order, then go to the next step.
Perform repair or diagnosis according to
available repair information.
• If vehicle is not repaired, go to the next step.
- automotive repair manuals website
B3E010201083W06