Mazda 626 Station Wagon, Workshop Manual

Page: 186 / 577

ON-BOARO DIAGNOSTIC SYSTEM
ON-BOARD DIAGNOSTIC SYSTEM
OUTLINE
• Due to the change of the accelerator position sensor type, a detection condition item has been added to DTC
P0120 for accelerator position sensor signal circuit.
• By using the “RPM DES” (target engine speed) for the PID/DATA MONITOR item, verification of target engine
speed during A/C operation and inspection of idle-up speed have been made possible.
• By adopting the “TP2 V” for the PID/DATA MONITOR item, comparison between the accelerator position
sensor TP V and TP2 V has been made possible, thus improving serviceability.
DTC
DTC Table
x : Applied
: Not applied
DTC
No.
Output pattern
Diagnosed
circuit
Detection condition
Fail-safe
Memory
function
P0105
Boost signal
circuit
Input voltage from boost
sensor is above 4.9 V when
engine switch is turned on.
Voltage more than 1.95 V is
inputted from boost sensor to
PCM when engine speed is
above 2400 rpm and
accelerator opening angle is
more than 52 %.
• Fixes intake air
pressure at
760 mmHg (2.65 V).
P0110
IAT No.1
signal circuit
Input voltage from IAT No.1
sensor is below 0.142 V or
above 4.915 V.
Fixes intake air
temperature No.1 at
40°C {104°F} (1.49
V).
P0115
JIM
ECT signal
circuit
• Input voltage from ECT sensor
is below 0.142 V or above
4.915 V.
• Fixes engine
coolant temperature
at 60°C {140°F}.
P0120
Accelerator
position
signal
circuit
Input voltage from accelerator
position sensor is below 0.3 V
or above 4.7 V when engine
switch is turned on.
Input voltage from accelerator
position sensor is above
1.35 V when idle switch is
turned on.
Voltage difference between
main and monitor accelerator
position sensor signal is above
0.9 V.
Fixes fuel injection
amount.
P0180
ill
Fuel
temperature
signal
circuit
• Input voltage from fuel temper­
ature sensor is below 0.142 V
or above 4.915 V.
• Fixes fuel
temperature at
30°C (1.91 V).
P0216
Injection
timing
system
• The actual injection timing
deviates from the target
injection timing by 7°
continuously after the engine
warm-up or while driving
continuously for
20
sec.
P0219
Spill valve
control
signal
circuit
• The engine speed signal
above 5600 rpm is inputted to
the PCM for 1.0 sec.
• PCM cannot control engine
though accelerator pedal is
released.
• Turns spill valve
relay off.
• Turns FSO solenoid
relay off.
• Turns spill valve
control signal off.
F2-10