Toyota 3S-GE Repair Manual page 197

ENGINE — EFI SYSTEM
EG-183
DIAGNOSTIC CODES (C0nt'd)
Number of
Code blinks of
No Check Engine
Warning
Light
System
Check Engine
Warning Light Diagnosis
*1
Normal Test
Mode Mode
Trouble Area
"2
Memory See page
41
_l1lUllUl_
H1614
Throttle
Position
Sensor
Signal
ON ON
Open or short detected in throttle position
sensor signal (VTA) for 0.5 sec. or more.
Open or short in throttle
position sensor circuit
Throttle position sensor
ECU
Q EG494
42
_liil.lllUiJl_
H1615
Vehicle
Speed
Sensor
Signal
OFF OFF
SPD signal is not input to the ECU for at
least 8 seconds during high load driving
with engine speed between 2,500 rpm and
5,000 rpm.
Open or short in vehicle
speed sensor circuit
Vehicle speed sensor
ECU
O _
43
Jllllll"UlIllL
H1616
Starter
Signal
N.A. OFF
Starter signal (STA) is not input to ECU until
TE1 and E1 are connected.
Open or short in starter
signal circuit
Open or short in IG SW or EFI
main relay circuit
ECU
X EG~2OO
52
_lilll1lill_lllL,.
Fl'|618
Knock
Sensor
Signal
ON N.A.
With engine speed between 2,850 rpm and
7,300 rpm, signal from knock sensor is not
input to ECU for 2 revolutions. lKNKl
Open or short in knock
sensor circuit
Knock sensor (looseness, etc.)
ECU
Q _.
53
.JlILlL'ill IlllfL
H1619
Knock
Control
Signal
ON NtA.
Engine speed is between 700 rpm and
7,300 rpm and ECU (for knock control)
malfunction is detected.
ECU X _
S1 _llJ'llifU'l_ll_
Fl'l617
Switch
Condi-
tion
Signal
N.A. OFF
Displayed when A/C is ON or IDL contact
OFF with the check terminals E1 and TE1
connected.
A/C switch circuit
Throttle position sensor IDL
circuit.
Accelerator pedal, cable
ECU
X EG-194
REMARKS:
"ON" displayed in the diagnosis mode column indicates that the check engine warning light is lit up
when a malfunction is detected. "OFF" indicates thatthe check engine warning light does not light up
during malfunction diagnosis, even ifa malfunction is detected. "N.A." indicates that the item is not
included in malfunction diagnosis.
"Q" in the memory column indicates that a diagnostic code is recorded in the ECU memory when a
malfunction occurs. "X" indicates that a diagnostic code is not recorded in the ECU memory even ifa
malfunction occurs. Accordingly, output of diagnostic results in normal or test mode is performed
with the ignition switch ON
"2 trip detection logic" (See page EG-178)
*1
*2
*3
l/U51-ill