Dtc P0489 - Mazda 6 Workshop Manual

DTC P0489

DTC P0489 EGR solenoid valve (vacuum) control circuit low input
• 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
DETECTION
CONDITION
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.
• 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)
POSSIBLE
terminal A
CAUSE
• 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
PCM CONTROL RELAY
TERMINAL C
PCM CONTROL
RELAY WIRING
EGR SOLENOID
HARNESS-SIDE
VALVE (VACUUM)
CONNECTOR
WIRING HARNESS-SIDE
CONNECTOR
A E
C
D
F2–130
ON-BOARD DIAGNOSTIC
EGR SOLENOID
VALVE (VACUUM)
7
5 4
A
26 25 24
52 51 50
78 77 76
B A
104 103 102
4 6 9
B
WIRING HARNESS-SIDE
CONNECTOR
23 22 21 20 19 18 17 16 15 14
49 48 47 46 45 44 43 42 41
75 74 73 72 71 70 69 68 67 66
101 100 99 98 97 96 95 94 93
PCM
99
PCM
13 12 11 10 9 8 7 6
40 39 38 37 36 35 34 33
65 64 63 62 61 60 59 58
92 91 90 89 88 87 86 85
B6E407000400105
5 4 3 2 1
32 31 30 29 28 27
57 56 55 54 53
84 83 82 81 80 79