Toyota Corolla (2004+). Manual - part 52
05-4
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
05289-10
CUSTOMER PROBLEM ANALYSIS CHECK
Inspector’s
ENGINE CONTROL SYSTEM Check Sheet
Name
Customer’s Name
VIN
Driver’s Name
Production Date
Date Vehicle
Licence No.
Brought in
km
Odometer Reading
miles
Engine does
Engine does not crank
No initial combustion
No complete combustion
not Start
Engine cranks slowly
Difficult to
Start
Other
Incorrect first idle
Idling rpm is abnormal
High (
rpm)
Low (
rpm)
Poor Idling
Rough idling
Other
Poor
Hesitation
Back fire
Muffler explosion (after-fire)
Surging
Driveability
Knocking
Other
Soon after starting
After accelerator pedal depressed
Engine Stall
After accelerator pedal released
During A/C operation
Shifting from N to D
Other
Others
Data Problem
Occurred
Constant
Sometimes (
times per
day/month)
Once only
Problem Frequency
Other
Weather
Fine
Cloudy
Rainy
Snowy
Various/Other
Outdoor
Hot
Warm
Cool
Cold (approx.
FC/
FF)
Temperature
Highway
Suburbs
Inner City
Uphill
Downhill
Place
Rough road
Other
Engine T emp.
Cold
Warming up
After Warming up
Any temp.
Other
Starting
Just after starting (
min.)
Idling
Racing
Engine Operation
Driving
Constant speed
Acceleration
Deceleration
A/C switch ON/OFF
Other
Condition of malfunction indicator light
Remains on
Sometimes lights up
Does not light up
(MIL)
Normal mode
Normal
Malfunction code(s) (code
)
(Pre-check)
Freeze frame data (
)
DTC Inspection
Normal
Malfunction code(s) (code
)
Check Mode
Freeze frame data (
)
05-17
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
05CRK-02
DATA LIST/ACTIVE TEST
1.
DATA LIST
HINT:
Using the DATA LIST displayed by the hand-held tester or the OBD II scan tool, you can read the value of
the switches, sensors, actuators and so on without parts removal. Reading the DATA LIST as a first step
of troubleshooting is one method to shorten diagnostic time.
NOTICE:
The values given below for ”Normal Condition” are representative values. A vehicle may still be nor-
mal even if its value differs from those listed here. Do not solely depend on the ”Normal Condition”
here when deciding whether a part is faulty or not.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c)
Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ”ON” button of the hand-held tester or the OBD II scan tool.
(f)
Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST”.
(g) According to the display on the tester, read the ”DATA LIST”.
Measurement Item/Range
Hand-held tester display
Normal Condition*1
Diagnostic Note
(Display)
Injection period of the No. 1 cylin-
INJECTOR
der/
Idling: 1.1 to 2.5 ms
Min.: 0 ms, Max: 32.64 ms
Ignition timing advance for No. 1
IGN ADVANCE
cylinder/
Idling: BTDC 8 to 20°
Min.: -64 deg., Max.: 63.5 deg.
Intake Air Control Valve duty ratio
Idling: 25 to 45 %
Opening ratio rotary solenoid type
IAC DUTY RATIO
Running without load (2,500 rpm):
ISC valve/
12.3 to 17.9 %
Min.: 0 %, Max.: 99 %
Idling: 11.3 to 20.0 %
Calculated load by ECM/
CALC LOAD
Running without load (2,500 rpm):
Min.: 0 %, Max.: 100 %
11.5 to 17.9 %
If the value is approximately 0.0
gm/s:
Idling: M/T 1.4 to 2.3 gm/s.
F Mass air flow meter power
Air flow rate from MAF sensor/
A/T 1.4 to 2.3 gm/s.
MAF
source circuit open
Min.: 0 gm/s, Max.: 655 gm/s
Racing without load (2,500 rpm):
F VG circuit open or short
5.4 to 7.9 gm/s.
If the value is 160.0 gm/s or more:
F E2G circuit open
Engine Speed/
Idling: M/T 650 to 750 rpm
ENGINE SPD
Min.: 0 rpm, Max.: 16,383 rpm
A/T 650 to 750 rpm
Coolant temperature/
After warming up: 80 to 95°C (176
F If the value is -40_C (-40_F):
COOLANT TEMP
Min.: -40 _C, Max.: 140 _C
to 203°F)
sensor circuit is open.
F If the value is greater than 140_C
Intake air temperature/
INTAKE AIR
Equivalent to Ambient Temp.
(284_F):
Min.: -40 _C, Max.: 140 _C
sensor circuit is shorted.
Absolute throttle position sensor/
Throttle Fully Closed: 8 to 18 %
Read the value with the ignition
THROTTLE POS
Min.: 0 %, Max.: 100 %
Throttle Fully Open: 64 to 98 %
switch ON (Do not start engine)
Closed throttle position switch/
Throttle Fully Closed: ON
CTP SW
ON or OFF
Throttle Open: OFF
Vehicle Speed/
VEHICLE SPD
Vehicle stopped: 0 km/h (0 mph)
Min.: 0 km/h, Max.: 255 km/h
05-18
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
Measurement Item/Range
Hand-held tester display
Normal Condition*1
Diagnostic Note
(Display)
Heated oxygen sensor output volt-
Performing the INJ VOL or A/F
O2S B1 S1
age for bank 1 sensor 1/
Idling: 0.1to 0.9V
CONTROL function of the ACTIVE
Min.: 0 V, Max.: 1.275 V
TEST enables the technician to
Heated oxygen sensor output volt-
check the voltage output of each
O2S B1 S2
age for bank 1 sensor 2/
Idling: 0.1to 0.9V
sensor.
Min.: 0 V, Max.: 1.275 V
Pressure inside the fuel tank can
Vapor Pressure/
VAPOR PRESS
Fuel tank cap removed: 0 kPa
be read by the vapor pressure
Min.: -4.125 kPa, Max.: 2.125 kPa
sensor
Short term fuel trim of bank 1/
SHORT FT #1
0 ± 20%
Min.: -100 %, Max.: 100 %
This item is the overall fuel com-
pensation carried out in long-term
Long term fuel trim of bank 1/
LONG FT #1
0 ± 20%
to compensate for a continual
Min.: -100 %, Max.: 100 %
deviation of the short-term fuel
trim from the central value.
Total fuel trim of bank 1:
Average value for fuel trim system
TOTAL FT #1
Idling: 0.5 to 1.4
of bank 1/
Min.: 0.5, Max.: 1.496
Short term fuel trim associated
O2FT B1 S1
with the bank 1 sensor 2/
0 ± 20 %
Same as SHORT FT #1
Min.: -100 %, Max.: 100 %
Short term fuel trim associated
O2FT B1 S2
with the bank 1 sensor 2/
0 ± 20 %
Same as SHORT FT #2
Min.: -100 %, Max.: 100 %
F OL: Open loop has not yet satis-
fied conditions to go closed loop.
F CL: Closed loop using heated ox-
ygen sensor(s) as feed back for
fuel control.
Fuel system status (Bank 1)/
F OL DRIVE: Open loop due to
OL or CL or OL DRIVE or
driving conditions. (fuel enrich-
FUEL SYS #1
OL FAULT or CL FAULT
Idling after warming up: CLOSED
ment)
F OL FAULT: Open loop due to de-
tected system fault.
F CL FAULT: Closed loop but one
of heated oxygen sensors, which
is used for fuel control, is func-
tioning improperly.
FC IDL = ”ON” when throttle valve
FC IDL
Fuel cut idle/ON or OFF
Fuel cut operating: ON
is fully closed and engine speed is
over 1,500 rpm.
Responsetime of the heated oxy-
gen sensor, lean to rich (bank 1
Idling after warming up:
O2 LR B1 S1
sensor 1)/
0 to 1,000 m/s.
Min.: 0 ms, Max.: 16,711 ms
Responsetime of the heated oxy-
gen sensor, from rich to lean (bank
Idling after warming up:
O2 RL B1 S1
1 sensor 1)/
0 to 1,000 m/s.
Min.: 0 ms, Max.: 16,711 ms
MIL
MIL status/ ON or OFF
MIL ON: ON
STARTER SIG
Starter Signal/ON or OFF
Cranking: ON
A/C SIG
A/C Signal/ON or OFF
A/C ON: ON
Park/neutral position switch signal/
PNP SW [NSW] *
2
P or N position: ON
ON or OFF
Electrical load signal /
ELECT LOAD SIG
Defogger switch ON: ON
ON or OFF
05-19
DIAGNOSTICS
-
SFI SYSTEM (April, 2003)
Measurement Item/Range
Hand-held tester display
Normal Condition*1
Diagnostic Note
(Display)
Stop Light Switch
F Brake pedal depressed ON
STOP LIGHT SW *2
/ON or OFF
F Brake pedal released OFF
Steering position is;
Power steering signal /
PS OIL PRESS SW
center: OFF
ON or OFF
Except center:ON
Power steering signal/
This signal is usually ON status
PS SIGNAL
When the steering wheel is turned
ON or OFF
until the IG switch is turned OFF.
Fuel pump / speed status /
FUEL PUMP / SPD
Idling: ON
ON/H or OFF/M,L
A/C magnet clutch status /
A/C MAG CLUTCH
A/C magnet clutch ON: ON
ON or OFF
VSV status for EVAP control/
VSV for EVAP is controlled by the
EVAP VSV
VSV operating: ON
ON or OFF
ECM (ground side duty control)
VVT control status (bank 1)/
VVT CTRL B1
VVT system operation: ON
ON or OFF
IGNITION
Ignition counter/ Min.: 0, Max.: 400
0 to 400
Misfire ratio of the cylinder 1 to 4/
CYL #1, #2, #3, #4
0 %
This item is displayed in only idling
Min.: 0 %, Max.: 50 %
Engine load for first misfire range/
MISFIRE LOAD
Misfire 0: 0 g/rev
Min.: 0 g/rev, Max.: 3.98 g/rev
Engine RPM for first misfire range/
MISFIRE RPM
Misfire 0: 0 rpm
Min.: 0 rpm, Max.: 6,375 rpm
Responsetime of the heated oxy-
gen sensor, lean to rich (bank 1
Idling after warming up:
O2 LR B1 S2
sensor 2)/
0 to 1,000 m/s.
Min.: 0 ms, Max.: 16,711 ms
The fuel cut is being performed un-
Fuel Cut TAU: Fuel cut during very
der very light load to prevent the
FC TAU
Fuel cut operating: ON
light load
engine combustion from becoming
incomplete.
Responsetime of the heated oxy-
gen sensor, rich to lean (bank 1
Idling after warming up:
O2 RL B1 S2
sensor 2)/
0 to 1,000 m/s.
Min.: 0 ms, Max.: 16,711 ms
CHECK MODE
Check mode/ON or OFF
Check mode ON:OFF
*1: If no conditions are specifically stated for ”ldling”, it means the shift lever is in the N or P position, the A/C
switch is OFF and all accessory switches are OFF.
*2: A/T only
05-20
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
2.
ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand-held tester or the OBD II scan tool allows the relay, VSV, ac-
tuator and so on to operate without parts removal. Performing the ACTIVE TEST as a first step of trouble-
shooting is one method to shorten diagnostic time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c)
Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ”ON” button of the hand-held tester or the OBD II scan tool.
(f)
Select the item ”DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST”.
(g) According to the display on the tester, perform the ”ACTIVE TEST”.
Hand-held Tester Display
Test Details
Diagnostic Note
[Test Details]
F All injectors are tested at once.
Control the injection volume
F Injection volume is gradually
INJ VOL
Min.: -12.5 %, Max.: 24.8 %
changed between -12.5 and
[Vehicle Condition]
25%.
Engine speed: 3,000 rpm or less
The following A/F CONTROL pro-
cedure enables the technician to
check and graph the voltage out-
puts of both the A/F sensor and
[Test Details]
heated oxygen sensor.
Control the injection volume
For displaying the graph indication,
A/F CONTROL
-12.5 or 25 % (Change the injection volume -12.5 % or 25 %.)
enter ”ACTIVE TEST/A/F CON-
[Vehicle Condition]
TROL/USER DATA”, then select
Engine speed: 3,000 rpm or less
”O2S B1S1 and O2S B1S2” by
pressing ”YES” button and push
”ENTER” button before pressing
”F4” button.
[Test Details]
Control the ISC duty ratio
0 to 90 %
IAC DUTY RATIO
[Vehicle Condition]
F Engine speed: Idling
F Vehicle speed: 0 mph (0 km/h)
F Battery voltage: 8.5 V or more
[Test Details]
CAN CTRL VSV
Activate the VSV for canister control
ON or OFF
[Test Details]
TANK BYPASS VSV
Activate the VSV for tank bypass.
ON or OFF
[Test Details]
EVAP VSV (ALONE)
Activate the VSV for EVAP control
ON or OFF
[Test Details]
A/C MAG CLUTCH
Control the A/C magnet clutch.
ON or OFF
[Test Details]
FUEL PUMP / SPD
Control the fuel pump
ON or OFF
05-21
DIAGNOSTICS
-
SFI SYSTEM (April, 2003)
Hand-held Tester Display
Test Details
Diagnostic Note
[Test Details]
F ON: Rough idle or engine stall.
VVT CTRL B1
Activate the VVT system (Bank 1).
F OFF: Normal engine speed.
ON or OFF
[Test Details]
TC/TE1
Connect the TC and TE1
ON or OFF
[Test Details]
FC IDL PROHBT
Control the idle fuel cut prohibit
ON or OFF
05-22
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
05DID-01
DEFINITION OF TERMS
Term
Definition
Monitor description
Description of what the ECM monitors and how it detects malfunction (monitoring purpose and its details).
Related DTCs
Diagnostic code
Preconditions that allow the ECM to detect malfunction.
Typical enabling condition
With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction
threshold(s).
The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunc-
tion.
Sequence of operation
While another sensor is being monitored, the next sensor or component will not be monitored until the previous
monitoring has concluded.
Required sensor/compo-
The sensors and components that are used by the ECM to detect malfunction.
nents
The number of times that the ECM checks for malfunction per driving cycle.
Frequency of operation
”Once per driving cycle” means that the ECM detects malfunction only one time during a single driving cycle.
”Continuous” means that the ECM detects malfunction every time when enabling condition is met.
The minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a
Duration
DTC. This timing begins after the ”typical enabling conditions” are met.
Malfunction thresholds
Beyond this value, the ECM will conclude that there is malfunction and set a DTC.
MIL illumination timing after a defect is detected.
”Immediately” means that the ECM illuminates the MIL the instant the ECM determines that there is malfunction.
MIL operation
”2 driving cycle” means that the ECM illuminates the MIL if the same malfunction is detected again in the 2nd driv-
ing cycle.
05-6
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
05CRG-02
DIAGNOSIS SYSTEM
1.
DESCRIPTION
F
When troubleshooting OBD II vehicles, the only differ-
ence from the usual troubleshooting procedure is that you
need to connect the vehicle to the OBD II scan tool com-
plying with SAE J1978 or the hand-held tester, and read
various data output from the vehicle’s ECM.
F
OBD II regulations require that the vehicle’s on-board
computer illuminates the Malfunction Indicator Light (MIL)
FI2547
on the instrument panel when the computer detects a
malfunction in the emission control system/components
or in the powertrain control components which affect ve-
hicle emissions, or a malfunction in the computer. In addi-
tion to the MIL illuminating when a malfunction is de-
tected, the applicable Diagnostic Trouble Codes (DTCs)
prescribed by SAE J2012 are recorded in the ECM
memory (See page 05-35).
If the malfunction does not reoccur in 3 consecutive trips, the
MIL goes off automatically but the DTCs remain recorded in the
ECM memory.
F
To check the DTC, connect the hand-held tester or OBD
Hand-held Tester
II scan tool to the Data Link Connector 3 (DLC3) of the ve-
hicle. The hand-held tester or OBD II scan tool also en-
ables you to erase the DTC and check the freeze frame
data and various forms of engine data (for operating
manuals, see the OBD II scan tool’s instruction book).
The DTC includes SAE controlled codes and manufactur-
er controlled codes. SAE controlled codes must be set as
DLC 3
A79121
prescribed by the SAE, while manufacturer controlled
codes can be set freely by a manufacturer within the pre-
scribed limits (see the DTC chart on page 05-35).
F
The diagnosis system operates in the normal mode dur-
ing normal vehicle use. It also has a check mode for tech-
nicians to simulate malfunction symptoms and trouble-
shoot it. Most DTCs use the 2 trip detection logic* to
prevent erroneous detection, and to ensure a thorough
malfunction detection. By switching the ECM to the check
mode when troubleshooting, a technician can cause the
MIL to illuminate for a malfunction that is only detected
once or momentarily (hand-held tester only) (See page
05-11).
F
*2 trip detection logic:
When a malfunction is first detected, the malfunction is
temporarily stored in the ECM memory (1st trip). If the
same malfunction is detected again during the second
05-7
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
drive test, this second detection causes the MIL to illumi-
nate (2nd trip) (However, the ignition switch must be
turned OFF between the 1st trip and 2nd trip).
F
Freeze frame data:
The freeze frame data records the engine conditions (fuel
system, calculated load, engine coolant temperature, fuel
trim, engine speed, vehicle speed, etc.) when a malfunc-
tion is detected. When troubleshooting, it is useful for de-
termining whether the vehicle was running or stopped,
the engine was warmed up or not, the air-fuel ratio was
lean or rich, etc. at the time of the malfunction.
Priorities for troubleshooting:
If troubleshooting priorities for multiple DTCs are given in the
applicable DTC chart, these priorities should be followed.
If no manuals are given, perform troubleshooting for those
DTCs according to the following priorities.
(a) DTCs other than fuel trim malfunction (DTCs P0171 and
P0172) and misfire (DTCs P0300 to P0304).
(b) Fuel trim malfunction (DTCs P0171 and P0172).
(c)
Misfire (DTCs P0300 to P0304).
2.
CHECK DLC3
The vehicle’s ECM uses the ISO 9141-2 for communica-
tion protocol. The terminal arrangement of the DLC3 com-
plies with SAE J1962 and matches the ISO 9141-2 for-
mat.
DLC3
C52361
Symbol
Terminal No.
Name
Reference terminal
Result
Condition
SIL
7
Bus ”+” line
5 - Signal ground
Pulse generation
During transmission
CG
4
Chassis ground
Body ground
1 W or less
Always
SG
5
Signal ground
Body ground
1 W or less
Always
BAT
16
Battery positive
Body ground
9 to 14 V
Always
HINT:
If the display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the OBD II scan tool or
the hand-held tester to the DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.
F
If the communication is normal when the tool is connected
to another vehicle, inspect the DLC3 on the original ve-
hicle.
F
If the communication is still impossible when the tool is
connected to another vehicle, the problem is probably in
the tool itself, so consult the Service Department listed in
the tool’s instruction manual.
05-8
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
3.
INSPECT BATTERY VOLTAGE
Battery Voltage: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
4.
CHECK MIL
(a) The MIL comes on when the ignition switch is turned ON
and the engine is not running.
HINT:
If the MIL is not illuminated, troubleshoot the MIL circuit
(See page 05-292).
(b) When the engine is started, the MIL should go off. If the
MiL remains on, it means that the diagnosis system has
detected a malfunction or abnormality in the system.
05-1
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
SFI SYSTEM (April, 2003)
05288-10
HOW TO PROCEED WITH TROUBLESHOOTING
The hand-held tester can be used at step 3, 4, 5, 7, 10.
1
VEHICLE BROUGHT TO WORKSHOP
2
CUSTOMER PROBLEM ANALYSIS (See page 05-4)
3
CONNECT HAND-HELD TESTER TO DLC3
HINT:
If the display indicates a communication fault in the tool, inspect DLC3.
4
CHECK DTC AND FREEZE FRAME DATA (See page 05-9)
HINT:
Record or print DTC and freeze frame data, if needed.
5
CLEAR DTC AND FREEZE FRAME DATA (See page 05-9)
6
VISUAL INSPECTION
7
SETTING CHECK (TEST) MODE DIAGNOSIS (See page 05-11)
8
PROBLEM SYMPTOM CONFIRMATION
HINT:
If the engine does not start, perform steps 10 and 12 first.
A
Malfunction does not occur
B
Malfunction occurs
B
GO TO STEP 10
A
05-2
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
9
SYMPTOM SIMULATION
10
DTC CHECK (See page 05-9)
A
Malfunction code
B
No code
B
GO TO STEP 12
A
11
DTC CHART (See page 05-9)
GO TO STEP 14
12
BASIC INSPECTION (See page 05-13)
A
Wrong parts not confirmed
B
Wrong parts confirmed
B
GO TO STEP 17
A
13
PROBLEM SYMPTOMS TABLE (See page 05-42)
A
Wrong circuit confirmed
B
Wrong parts confirmed
B
GO TO STEP 17
A
14
CHECK ECM POWER SOURCE CIRCUIT (See page 05-273)
15
CIRCUIT INSPECTION
A
Malfunction not confirmed
B
Malfunction confirmed
B
GO TO STEP 18
A
05-3
DIAGNOSTICS
-
SFI SYSTEM (April, 2003)
16
CHECK FOR INTERMITTENT PROBLEMS (See page 05-41)
GO TO STEP 18
17
PARTS INSPECTION
18
IDENTIFICATION OF PROBLEM
19
ADJUSTMENT, REPAIR
20
CONFIRMATION TEST
END
05-35
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
05284-12
DIAGNOSTIC TROUBLE CODE CHART
HINT:
F
As for the vehicle for MEXICO, refer to Repair Manual 2003 COROLLA (Pub. No. RM938U).
F
Parameters listed in the chart may not be exactly the same as your readings due to the type of instru-
ment or other factors.
If a malfunction code is displayed during the DTC check in the check mode, check the circuit for the codes
listed in the table below. For details of each code, refer to the ’’See page’’ under the respective ’’DTC No.’’
in the DTC chart.
DTC No.
Detection Item
Trouble Area
MIL*1
Memory
(See Page)
F Open or short in oil control valve circuit
P0010
Camshaft Position ”A” Actuator
F Oil control valve
_
_
(05-44)
Circuit (Bank 1)
F ECM
Camshaft Position ”A” -Timing
P0011
F Valve timing
Over-Advanced or System Per-
_
_
(05-50)
F Oil control valve
formance (Bank 1)
F Camshaft timing gear assy
P0012
Camshaft Position ”A” -Timing
F ECM
_
_
(05-50)
Over- Retarded (Bank 1)
Crankshaft Position - Camshaft
F Mechanical system (Timing chain has jumped a tooth, chain
P0016
Position Correlation (Bank 1
stretched)
_
_
(05-58)
Sensor A)
F ECM
P0031
Oxygen Sensor Heater Control
_
_
(05-60)
Circuit Low (Bank 1 Sensor 1)
P0032
Oxygen Sensor Heater Control
F Open or short in heater circuit of heated oxygen sensor
_
_
(05-60)
Circuit High (Bank 1 Sensor 1)
F Heated oxygen sensor heater
P0037
Oxygen Sensor Heater Control
F EFI relay
_
_
(05-60)
Circuit Low (Bank 1 Sensor 2)
F ECM
P0038
Oxygen Sensor Heater Control
_
_
(05-60)
Circuit High (Bank 1 Sensor 2)
F Open or short in mass air flow sensor circuit
P0100
Mass or Volume Air Flow Circuit
F Mass air flow sensor
_
_
(05-65)
F ECM
P0101
Mass or Volume Air Flow Circuit
F Mass air flow sensor
_
_
(05-72)
Range/Performance Problem
P0102
Mass or Volume Air Flow Circuit
F Open or short in mass air flow sensor circuit
_
_
(05-65)
Low Input
F Mass air flow sensor
P0103
Mass or Volume Air Flow Circuit
F ECM
_
_
(05-65)
High Input
P0110
Intake Air Temperature Circuit
_
_
(05-74)
F Open or short in intake air temperature sensor circuit
P0112
Intake Air Temperature Circuit
F Intake air temperature sensor (built in mass air flow sensor)
_
_
(05-74)
Low Input
F ECM
P0113
Intake Air Temperature Circuit
_
_
(05-74)
High Input
F Open or short in engine coolant temperature sensor circuit
P0115
Engine Coolant Temperature Cir-
F Engine coolant temperature sensor
_
_
(05-80)
cuit
F ECM
Engine Coolant Temperature Cir-
F Cooling system
P0116
cuit Range/Performance Prob-
F Engine coolant temperature sensor
_
_
(05-85)
lem
F Thermostat (water inlet)
P0117
Engine Coolant Temperature Cir-
F Open or short in engine coolant temperature sensor circuit
_
_
(05-80)
cuit Low Input
F Engine coolant temperature sensor
P0118
Engine Coolant Temperature Cir-
F ECM
_
_
(05-80)
cuit High Input
P0120
Throttle/Pedal Position Sensor/
F Throttle position sensor (built in throttle body)
_
_
(05-87)
Switch ”A” Circuit
F ECM
05-36
DIAGNOSTICS
- SFI SYSTEM (April, 2003)
DTC No.
Detection Item
Trouble Area
MIL*1
Memory
(See Page)
Throttle/Pedal Position Sensor/
P0121
Switch ”A” Circuit Range/Perfor-
F Throttle position sensor (built in throttle body)
_
_
(05-94)
mance Problem
F Throttle position sensor (built in throttle body)
P0122
Throttle/Pedal Position Sensor/
F Short in VTA circuit
_
_
(05-87)
Switch ”A” Circuit Low Input
F Open in VC circuit
F ECM
F Throttle position sensor (built in throttle body)
F Open in VTA circuit
P0123
Throttle/Pedal Position Sensor/
F Open in E2 circuit
_
_
(05-87)
Switch ”A” Circuit High Input
F VC and VTA circuit are short-circuited
F ECM
F Cooling system
P0125
Insufficient Coolant Temperature
F Engine coolant temperature sensor
_
_
(05-96)
for Closed Loop Fuel Control
F Thermostat
F Thermostat
Coolant Thermostat (Coolant
P0128
F Cooling system
Temperature Below Thermostat
_
_
(05-98)
F Engine coolant temperature sensor
Regulating Temperature)
F ECM
F Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
F Heated oxygen sensor (bank 1 sensor 1)
F Heated oxygen sensor heater (bank 1 sensor 1)
P0130
Oxygen Sensor Circuit (Bank 1
F EFI relay
_
_
(05-101)
Sensor 1)
F Air induction system
F Fuel pressure
F Injector
F ECM
F Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
F Heated oxygen sensor (bank 1 sensor 1)
F Heated oxygen sensor heater (bank 1 sensor 1)
P0133
Oxygen Sensor Circuit Slow Re-
F EFI relay
_
_
(05-111)
sponse (Bank 1 Sensor 1)
F Air induction system
F Fuel pressure
F Injector
F ECM
F Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
F Heated oxygen sensor (bank 1 sensor 1)
F Heated oxygen sensor heater (bank 1 sensor 1)
F EFI relay
F Air induction system
P0134
Oxygen Sensor Circuit No Activ-
F Fuel pressure
_
_
(05-120)
ity Detected (Bank 1 Sensor 1)
F PCV hose connection
F PCV valve and hose
F Injector
F Gas leakage in exhaust system
F PCV piping
F ECM
F Open or short in heated oxygen sensor (bank 1 sensor 2)
circuit
P0136
Oxygen Sensor Circuit Malfunc-
F Heated oxygen sensor (bank 1 sensor 2)
_
_
(05-128)
tion (Bank 1 Sensor 2)
F Heated oxygen sensor heater (bank 1 sensor 2)
F EFI relay