Dtc P0123 - Mazda 6 Workshop Manual

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DTC P0123

DTC P0123 Accelerator pedal position (APP) sensor No.1 circuit high input
• The PCM monitors the input signal from accelerator pedal position sensor No.1. If the voltage from
accelerator pedal position sensor No.1 is more than 4.7 V, the PCM determines that there is a malfunction
in the accelerator pedal position sensor No.1 circuit.
DETECTION
Diagnostic support note
CONDITION
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• APP sensor No.1 malfunction
• Connector or terminal malfunction
POSSIBLE
• Short to power supply in wiring harness between APP sensor terminal B and PCM terminal 10
CAUSE
• Open circuit in wiring harness between APP sensor terminal D and PCM terminal 91
• PCM malfunction
APP SENSOR NO.2
(APP SENSOR)
6
APP SENSOR
WIRING HARNESS-SIDE
CONNECTOR
D C
B
F2–80
ON-BOARD DIAGNOSTIC
4
A
4
B
4
D
26 25 24 23
52 51 50 49
A
78 77 76 75
104 103 102 101
7
90
5 7
10
7
8
91
PCM
WIRING HARNESS-SIDE
CONNECTOR
22 21 20 19 18 17 16 15 14
48 47 46 45 44 43 42 41 40
74 73 72 71 70 69 68 67 66
100 99 98 97 96 95 94 93 92
PCM
13 12 11 10 9 8 7 6 5
39 38 37 36 35 34 33 32 31
65 64 63 62 61 60 59 58 57
91 90 89 88 87 86 85 84 83
B6E407000100114
4 3 2 1
30 29 28 27
56 55 54 53
82 81 80 79