Dtc P0117 - Mazda 6 Workshop Manual

DTC P0117

DTC P0117 Engine coolant temperature (ECT) sensor circuit low input
• The PCM monitors the input signal from the engine coolant temperature sensor. If the voltage from the
engine coolant temperature sensor is less than 0.14 V, the PCM determines that there is a malfunction in
the engine coolant temperature sensor 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.
• ECT sensor malfunction
• Connector or terminal malfunction
POSSIBLE
• Short to GND in wiring harness between ECT sensor terminal A and PCM terminal 87
CAUSE
• PCM malfunction
ECT SENSOR
WIRING HARNESS-SIDE
CONNECTOR
B A
F2–74
ON-BOARD DIAGNOSTIC
ECT SENSOR
4
A
6
4
B
26 25 24
52 51 50
78 77 76
104 103 102
7
5
87
7
91
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
PCM
13 12 11 10 9 8 7
40 39 38 37 36 35 34 33
65 64 63 62 61 60 59
92 91 90 89 88 87 86 85
B6E407000100111
6 5 4 3 2 1
32 31 30 29 28 27
58 57 56 55 54 53
84 83 82 81 80 79