DI37T–03
DI–14
–DIAGNOSTICS ENGINE
2000 CELICA (RM744U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code listed
in the table below. For details of each code, turn to the page referred to under the ’’See page ’’ for the respec-
tive ’’DTC No.’’ in the DTC chart.
SAE CONTROLLED:
DTC No. Detection Item Trouble Area MIL*
1
Memory
P0100
(DI–23)
Mass Air Flow Circuit Malfunc-
tion
SOpen or short in mass air flow meter circuit
SMass air flow meter
SECM
f f
P0101
(DI–27)
Mass Air Flow Circuit Range/
Performance Problem
SMass air flow meter f f
P0110
(DI–28)
Intake Air Temp. Circuit Malfunc-
tion
SOpen or short in intake air temp. sensor circuit
SIntake air temp. sensor (built into mass air flow meter)
SECM
f f
P0115
(DI–33)
Engine Coolant Temp. Circuit
Malfunction
SOpen or short in engine coolant temp. sensor circuit
SEngine coolant temp. sensor
SECM
f f
P0116
(DI–37)
Engine Coolant Temp. Circuit
Range/Performance Problem
SCooling system
SEngine coolant temp. sensor
f f
P0120
(DI–38)
Throttle/Pedal Position Sensor/
Switch ”A” Circuit Malfunction
SOpen or short in throttle position sensor circuit
SThrottle position sensor
SECM
f f
P0121
(DI–43)
Throttle/Pedal Position Sensor/
Switch ”A” Circuit Range/Perfor-
mance Problem
SThrottle position sensor
SECM
f f
P0125
(DI–44)
Insufficient Coolant Temp. for
Closed Loop Fuel Control
SOpen or short in heated oxygen sensor (bank 1 sensor 1)
circuit
SHeated oxygen sensor (bank 1 sensor 1)
SAir induction system
SFuel pressure
SInjector
SGas leakage on exhaust system
SECM
f f
P0130
(DI–49)
Heated Oxygen Sensor Circuit
Malfunction (Bank 1 Sensor 1)
(Except Calif.)
SOpen or short in heated oxygen sensor circuit
SHeated oxygen sensor
SAir induction system
SEGR system
SFuel pressure
SInjector
SECM
f f
P0133
(DI–53)
Oxygen Sensor Circuit Slow Re-
sponse (Bank 1 Sensor 1)
SOpen or short in heated oxygen sensor circuit
SHeated oxygen sensor
SAir induction system
SEGR system
SFuel pressure
SInjector
SECM
f f
P0135
(DI–56)
Oxygen Sensor Heater Circuit
Malfunction (Bank 1 Sensor 1)
SOpen or short in heater circuit of heated oxygen sensor
SHeated oxygen sensor heater
SECM
f f
