Mazda 6 - Dtc P0489

F2–130
ON-BOARD DIAGNOSTIC
DTC P0489
B6E407000400105
DTC P0489 EGR solenoid valve (vacuum) control circuit low input
DETECTION
CONDITION
• The PCM monitors the output signal to the EGR solenoid valve (vacuum). If the EGR solenoid valve
(vacuum) voltage is low even if the EGR solenoid valve (vacuum) is off, the PCM determines that there is a
malfunction in the intake shutter solenoid valve control circuit.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or
in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE
CAUSE
• EGR solenoid valve (vacuum) malfunction
• Connector or terminal malfunction
• Open circuit in wiring harness between PCM control relay terminal C and EGR solenoid valve (vacuum)
terminal A
• Open circuit in wiring harness between EGR solenoid valve (vacuum) terminal B and PCM terminal 99
• Short to GND in wiring harness between EGR solenoid valve (vacuum) terminal B and PCM terminal 99
• PCM malfunction
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555657
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798081828384858687888990
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919294 939596979899100
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101102103104
99BA
445 6
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E
C
D
A
PCM CONTROL RELAY
TERMINAL C
EGR SOLENOID
VALVE (VACUUM)
PCM CONTROL
RELAY WIRING
HARNESS-SIDE
CONNECTOR
EGR SOLENOID
VALVE (VACUUM)
WIRING HARNESS-SIDE
CONNECTOR
PCM
PCM
WIRING HARNESS-SIDE
CONNECTOR
BA