ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE) 6-1-27
Fail-Safe Table
When any of the following DTCs is detected, ECM enters fall-safe mode as long as malfunction continues to
exist but that mode is canceled when ECM detects normal condition after that.
DTC
NO.
TROUBLE AREA FAIL SAFE OPERATION
FAIL SAFE MODE
REACTIVATION CONDITION
P0100
(No.33,
34)
MAF SENSOR Injector drive time (fuel injection vol-
ume) is determined according to throt-
tle valve operating (idle position or
not).
Detected value of MAF sensor out-
put voltage is 0.3 V min. and 5.0 V
max.
P0110
(No.23,
25)
IAT SENSOR ENGINE control is performed on the
basis of 40°C (104°F) intake air temp.
Detected value of IAT sensor out-
put voltage is 0.16 V min. and 5.00
V max.
P0115
(No.14,
15)
ECT SENSOR • ENGINE control is performed on the
basis of 80°C (176°F) engine cool-
ant temp.
• A/T control is performed on the
basis of 31°C (88°F) engine coolant
temp.
Detected value of ECT sensor out-
put voltage is 0.16 V min. and 5.00
V max.
P0120
(No.21,
22)
TP SENSOR • ENGINE control is performed on the
basis of 8 deg. throttle opening.
• A/T control is performed on the
basis of 0% throttle position.
Detected value of TP sensor output
voltage is 0.10 V min. and 4.80 V
max.
P0500
(No.24)
VEHICLE SPEED
SENSOR
ENGINE control is performed on the
basis of 10 km/h vehicle speed.
And air flow at IAC valve is limited.
Vehicle speed sensor signal is
detected.
P0705
TR SWITCH A/T control is performed in priority
order of L, 2, N, D and R when more
than one of R, D, N, 2 and L signals
are inputted simultaneously.
Single signal is inputted.
P0720
OUTPUT SPEED
SENSOR CIRCUIT
MALFUNCTION
A/T control is performed by using sig-
nal from VSS.
Detected vehicle speed signal is 10
km/h (6 mph) or more.
P0753
SHIFT SOLENOID A
(#1)
SHIFT SOLENOID #1 : OFF
SHIFT SOLENOID #2 : ON
TCC SOLENOID : OFF
Monitor signal ON is detected
when solenoid A (#1) is ON and
monitor signal OFF is detected
when it is OFF.
P0758
SHIFT SOLENOID B
(#2)
SHIFT SOLENOID #1 : OFF
SHIFT SOLENOID #2 : OFF
TCC SOLENOID : OFF
Monitor signal ON is detected
when solenoid B (#2) is ON and
monitor signal OFF is detected
when it is OFF.
P0743
TCC (LOCK-UP)
SOLENOID
TCC (Lock-up) solenoid OFF Monitor signal ON is detected
when TCC control solenoid is ON
and monitor signal OFF is detected
when it is OFF.
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