Mazda Protege 5. Manual - part 81
ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]
01–02B–144
End Of Sie
DTC P1562 [FS]
A3U010201083W10
3
CLASSIFY INTERMITTENT CONCERN OR
CONTINUOUS CONCERN
•
Clear DTC from PCM memory using WDS or
equipment.
•
Verify that following conditions are met.
— ECT: at 20
°°°°
C {68
°°°°
F}
•
Drive vehicle under following conditions:
— Engine speed: above 3,000 rpm
— MAF: below 45.2 g/s {6.0 lb/min}
•
Is pending code of same DTC present?
Yes Go to next step.
No
Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See 01–03B–4 INTERMITTENT CONCERN
TROUBLESHOOTING [FS].)
4
VERIFY STORED OTHER DTCS
•
Verify stored DTCs using WDS or equipment.
•
Is other DTC present except P1512?
Yes Go to appropriate DTC troubleshooting procedures.
No
Go to next step.
5
INSPECT VTCS SHUTTER VALVE ACTUATOR
•
Carry out “VTCS operation inspection”
(See 01–03B–57 Variable Tumble Control
System (VTCS) Inspection.)
•
Is VTCS shutter valve actuator okay?
Yes Go to next step.
No
Replace VTCS shutter valve actuator, then go to Step 8.
6
INSPECT VTCS SOLENOID VALVE
•
Carry out “VTCS solenoid valve airflow
inspection”
(See 01–13B–15 VARIABLE TUMBLE
CONTROL SYSTEM (VTCS) SOLENOID
VALVE INSPECTION [FS].)
•
Is VTCS solenoid valve okay?
Yes Go to next step.
No
Replace VTCS solenoid valve, then go to Step 8.
7
CHECK PCM POOR CONNECTION
•
Check for poor connection at PCM terminal 73
(damaged/pulled-out terminals, corrosion,
etc.).
•
Is there malfunction?
Yes Repair terminal, then go to next step.
No
Go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P1512
COMPLETED
•
Make sure to reconnect all disconnected
connectors.
•
Start engine.
•
Clear DTC from PCM memory using WDS or
equipment.
•
Start engine.
•
Verify that following conditions are met.
— ECT: at 20
°°°°
C {68
°°°°
F}
•
Drive vehicle under following conditions:
— Engine speed: above 3,000 rpm
— MAF: below 45.2 g/s {6.0 lb/min}
•
Is pending code of same DTC present?
Yes Replace PCM, then go to next step.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
•
Perform “After Repair Procedure”.
(See 01–02B–9 AFTER REPAIR
PROCEDURE [FS].)
•
Is there any DTC present?
Yes Go to applicable DTC inspection.
(See 01–02B–15 DTC TABLE [FS].)
No
Troubleshooting completed.
STEP
INSPECTION
ACTION
DTC P1562
PCM +BB voltage low
DETECTION
CONDITION
•
PCM monitors voltage of backup battery positive terminal at PCM terminal 55 after engine is started. If the
PCM detected battery positive terminal voltage below 2.5 V for 2 seconds, PCM determines that backup
voltage circuit has malfunction.
Diagnostic support note
•
This is a continuous monitor (CCM).
•
MIL illuminates if PCM detects the above malfunction condition during first drive cycle. Therefore,
PENDING CODE is not available.
•
FREEZE FRAME DATA is available.
•
DTC is stored in PCM memory.
POSSIBLE
CAUSE
•
Open circuit or short to ground in wiring between battery positive terminal and PCM terminal 55
•
Poor connection of PCM connector
•
PCM malfunction
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