DIAGNOSIS
- Diagnostic Code
s
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Examples of diagnostic codes of OBD-II com- OBD-II system has a check mode function in
patible engines in vehicles sold in the U
.S
.A
. which detection of a problem has greater sen-
and Canada are show below
. In the same sitivity than the normal mode
.
manner as the conventional OBD system, th
e
• Camry 1 MZ-FE
engine
(1994 model year
)
COD
E
NO
CIRCUITRY
"CHEC
K
ENGINE"
DIAGNOSIS
TROUBLE AREA
MEMOR
Y
.
LAMP • ~
(MEANING OF TROBLE
CODE
)
P0100
Mass
air flow circuit
ON
Open or short in mass air flow meter circuit with
• Open or short in mass air flow meter circui
t
malfunction
engine speed
4,000 rpm
or less
• Mass air flow meter
0
• EC
U
Conditions a) and b) continue with engine spee
d
Mass air flow
circuit
900
rpm or less
:
P0101
range/performance
ON
(2 trip detection
logic)
`3
• Mass air flow meter
0
problem
a) Closed throttle position switch
: O
N
b) Mass air flow
meter output > 2
.2 V
• Open or short
in intake air temp
. senso
r
P0110
Intake
air temp
. circui
t
lf
i
ON
Open or short
in intake air temp
. sensor
circuit
circuit
O
ma
unct
on
• Intake air temp
. senso
r
• EC
U
• Open or short
in engine coolant temp
.
P0115
Engine coolant
temp
.
ON
Open or short
in engine coolant
temp
. sensor
sensor circui
t
circuit malfunction
circuit
• Engine coolant
temp
. sensor
O
• EC
U
Engine coolant temp
.
20 min
. or more
after starting engine, engin
e
P0116
circuitrange/
ON
coolant temp
. sensor value is 30°C (86°F) of
• Engine
coolant temp
.
sensor
0
performance problem
less
• Coolant syste
m
(2 trip detection logic)'
3
+
1
* 2
*3
"ON" displayed in the diagnosis mode column indicates that the "CHECK ENGINE" warning light is
lighted up when a malfunction is detected
.
"0" in the
memory column indicates that a diagnostic code is recorded in the ECU memory when a
malfunction is detected
. Accordingly, output of diagnostic results in normal or test mode is perform-
ed with the ignition switch ON
.
"
2 trip detection logic"
(
See page
134)
.
140
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