DIAGNOSIS
- Diagnostic Code
s
"CHECK ENGINE"
,
z
CODE
NUMBER OF TIME
S
_
"
UITRY
LAMP"
DIAGNOSIS
TROUBLE AREA MEMOR
Y
NO
.
CHECK
ENGINE
LAMP
CIRC
NORMAL
TEST
(MEANING
OF TROUBLE
CODE
)
BLINKS
MODE
MOD
E
Throttle
• Open or short in throttl
e
nn
r
Jn
n ULI LI LJ
L
position
OFF
ON
Open or short circuit in throttle position
position sensor circuit
0
41
--
sensor
sensor signal (VTA
)
.
• Throttle position senso
r
signal
• EC
U
OFF
N
A
No "SPD" signal to ECU for 8 seconds whe
n
. .
vehicle is running
.
• Open or sho
rt
in vehicl
e
rI rI fl rl r1 f1
Vehicle speed
speed sensor circuit
Q,
•
42
J ll lJ ll LJ U L-
sensor signal
• Vehicle speed senso
r
N A
OFF
No "SPD" signal input to ECU after ignition
• EC
U
. .
switch is turned on
.
• Open or short in starte
r
43
nn~7n nn
n
J LI LI u L~ u U
L
Starter signal
N
.A
.
OFF
No "STA" signal input to ECU after ignition
signal circui
t
• Open or short in IG SW or
x
switch is turned on
.
main relay circui
t
• EC
U
• Open or sho
rt
in knoc
k
With engine speed between 1,200 rpm and
sensor circui
t
52
~
Knock sensor
ON
N
.A
.
6,000 rpm, signal from knock sensor is not
• Knock sensor
(looseness,
0
signal
input to ECU for ce
rt
ain period
.
(
KNK)
etc
.
)
• EC
U
Displayed when A/C is ON, IDL contact OFF or
~ A/C switch syste
m
Switch
"R", "D", "2", or "L" rang
e
shift lever is in
Throttle position senso
r
51's
~_
condition
N
.A
.
OFF
and STA is OFF with the check terminals
El
IDL circuit
x
signals
and TE1 connected at test mode
.
• Accelerator pedal, cabl
e
• EC
U
+
1
*
2
* 3
*4
5
"ON" displayed in the diagnosis mode column indicates that the "CHECK ENGINE" lamp is lighted up
when a malfunction is detected
. "OFF" indicates that the "CHECK ENGINE" lamp does not light up dur-
ing malfunction diagnosis, even if a malfunction is detected
. "N
.A
." indicates that the item is not includ-
ed in malfunction diagnosis
.
Lighting of the "CHECK ENGINE" lamp varies depending on engine models and the destinations
.
" 0" in the memory column indicates that a diagnostic code is recorded in the ECU memory when a
malfunction is detected
. " x" indicates that a diagnostic code is not recorded in the ECU memory even
if 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) is only active at the normal mode
.
Not stored in memory at the test mode
.
IDL contact off is not detected until after the engine starts
.
139
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