Diagnostic Trouble Code Numbers - Mazda B-Series 1997 Workshop Manual

ON-BOARD DIAGNOSIS SYSTEM
FT
DIAGNOSTIC TROUBLE CODE NUMBERS
NO.
DIAGNOSED CIRCUIT CONDITION
PAGE
FT-82
Mass Airflow Sensor (MAF) MAF signal went below 0.39 volts sometime during normal engine
operation or KOER self-test
MAF signal went above 3.90 volts during KOEO or KOER self-test.(')
Intake Air Temperature
(IAT) Sensor
IAT signal is less than 0.2 volt (250°F (121 "C}).
IAT signal was not received during KOEOIKOER self-test, but was
output during RetrieveIClear Continuous DTC Self-Test.
IAT signal is greater than 4.6 volts (-46°F (-50°C)).
IAT signal was not received during KOEOIKOER self-test, but was
output during RetrieveIClear Continuous DTC Self-Test.
Engine Coolant
Temperature (ECT) Sensor
ECT signal is less than 0.2 volt (250°F (121 "C)).
ECT signal was not received during KOEO/KOER self-test, but was
output during RetrieveIClear Continuous DTC Self-Test.
ECT signal is greater than 4.6 volts (-46°F {-50°C)).
ECT signal was not received during KOEOIKOER self-test, but was
output during RetrieveIClear Continuous DTC Self-Test.
PO1 21 Throttle Posit~on (TP)
Sensor
FT-87
Engine Coolant
Temperature (ECT) Sensor
ECT signal has not achieved required temperature level to enter closed
loop operating conditions within a specified amount of time after
starting engine.
Heated Oxygen Sensor
generates a negative voltage.
POI 33
(H02S)-11
Response rate of H02S-11 is below calibrated window. FT-90
1
PO1 35
1
H02S HTR 11
/
H02S-11 heater circuit has a short to ground, open, or short to VPWR.
I
FT-92
I
H02S-12 output voltage is less than calibrated functional window.
Any exhaust leaks between engine and end of catalyst may cause this
DTC.
Heated Oxygen Sensor
1
(H02S)-12
I
PO141
i
H02S HTR 12
1
H02S-12 heater circuit has a short to ground, open, or short to VPWR.
I
FT-92
I
H02S-21 generates a negative voltage.
I
FT-90
I
Response rate of H02S-21 is below calibrated window.
H02S-21 heater circuit has a short to ground, open, or short to VPWR.
- -
- -
Fuel adaptive system is at rich correction limit due to fuellair ratio too
lean (#1 cylinder bank).
Fuel adaptive system is at lean correction limit due to fuellair ratio too
rich (#I cylinder bank).
Fuel adaptive system is at rich correction limit due to fuellair ratio too
lean (opposite bank).
I
PO155
1
H02S HTR 21
Adaptive Fuel Control
Fuel adaptive system is at lean correction limit due to fuellair ratio too
rich (opposite bank).
PO230 Fuel Pump Relay
PO231
/
Fuel pump primary circuit failure.
/
FT-102
Fuel pump secondary circuit failure between B+ supply and fuel pump FT-102
monitor (test pin 40) connection to power-to-pump circuit.
Fuel pump monitor circuit voltage was high when fuel pump was
commanded off. FT-102
Multiple cylinders misfiring, or cannot identify cylinder due to camshaft
position sensor failure.
- -
Cylinder #1 misfiring.
PO300 Misfire Detection Monitor
Cylinder $2 misfiring.
Cylinder #3 misfiring. FT-106