2005 TOYOTA AVENSIS fuel

A63955
GND
CH1
(G2+)
CH2
(NE+) GND
05–140
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0340 CAMSHAFT POSITION SENSOR ”A” CIRCUIT (BANK 1 OR SINGLE SENSOR)
DTC P0341 CAMSHAFT POSITION SENSOR ”A” CIRCUIT RANGE/PERFORMANCE (BANK 1
OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The Camshaft Position (CMP) sensor consists of a magnet and an iron core which is wrapped with coppe\
r
wire, and is installed on the cylinder head. When the camshaft rotates, each \
of 3 teeth on the camshaft
passes through the CMP sensor. This activates the internal magnet in the sensor, generating a voltage in
the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft
turns twice the voltage is generated 3 times in the CMP sensor. The generated voltage in the sensor acts
as a signal, allowing the ECM to locate the camshaft position. This signal is then used to con\
trol ignition tim-
ing, fuel injection timing, and the VVT system.
DTC No.DTC Detection ConditionTrouble Area
P0340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)Open or short in camshaft position sensor circuit
 Camshaft position sensor
Camshaft timing pulleyP0340(2 trip detection logic)
No camshaft position sensor signal to ECM at engine speed
of 600 rpm or more (1 trip detection logic)Camshaft timing pulley
 Jumped tooth of timing chain
 ECM
P0341While crankshaft rotates twice, camshaft position sensor signal
is input to ECM 12 times or more (1 trip detection logic)
Open or short in camshaft position sensor circuit
 Camshaft position sensor
 Camshaft timing pulley
 Jumped tooth of timing chain
 ECM
HINT:
DTC P0340 indicates a malfunction related to the CMP sensor (+) circuit (the wi\
re harness between
the ECM and CMP sensor, and the CMP sensor itself).
DTC P0341 indicates a malfunction related to the CMP sensor (–) cir\
cuit (the wire harness between
the ECM and CMP sensor, and the CMP sensor itself).
Reference: Inspection using the oscilloscope.
HINT:
The correct waveform is as shown on the left.
G2+ stands for the camshaft position sensor signal, and
NE+ stands for the crankshaft position sensor signal.
ItemContents
TerminalCH1: G2+ – NE–
CH2: NE+ – NE–
Equipment Setting5V/Division, 20ms/Division
ConditionDuring cranking or idling
WIRING DIAGRAM
Refer to DTC P0335 on page 05–136.
05B5J–14

A64984Camshaft Position Sensor Component Side:
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–141
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester II. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
1 INSPECT CAMSHAFT POSITION SENSOR(RESISTANCE)
(a) Disconnect the C1 camshaft position sensor connector.
(b) Measure the resistance between the terminals of the
camshaft position sensor.
Standard:
Tester ConnectionSpecified Condition
1 – 2835 to 1,400 Ω at cold
1 – 21,060 to 1,645 Ω at hot
NOTICE:
Terms ”cold” and ”hot” refer to the temperature of the
coils. ”Cold” means approximately –10 to 50C (14 to
122F). ”Hot” means approximately 50 to 100C (122 to
212F).
(c) Reconnect the camshaft position sensor connector.
NG REPLACE CAMSHAFT POSITION SENSOR
(See page 18–5 of Pub. No. RM1018E AVENSIS)
OK

A96003
K1
Knock Sensor1 (Shielded)
J/C J5
J51
E12 ECM
KNK1
EH
2
E122
EKNK
BB
J65 V
W
J6
EE D
EB1
EB1
2
1
D
BR BR
W
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–133
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester II. Freeze frame data record the engine condition\
when
malfunctions are detected. When troubleshooting, freeze frame data can h\
elp determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean \
or rich, and other data
from the time the malfunction occurred.
1 READ OUTPUT DTC
(a) Clear the DTC(s) ( see page 05–18).
(b) Warm up the engine.
(c) Run the engine at 3,000 rpm for 10 seconds or more.
(d) Connect the intelligent tester II to the DLC3.
(e) Turn the ignition switch to ON and turn the intelligent tester II ON.
(f) Select the following menu items: Powertrain / Engine and ECT / DTC.
(g) Read DTCs. Result :
Display (DTC Output)Proceed To
P0325A
P0325, and P0327 and/or P0328B
No outputC
B Go to step 3
C CHECK FOR INTERMITTENT PROBLEMS (See page 05–9 )
A

A78423
20V
/Division Injector Signal Waveform
20V
/Division
GND
100 msec./Division (Idling)(Magnification)
GND
1 msec./Division (Idling)
Injection Duration
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–119
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)DTC No.
DTC Detection ConditionTrouble Area
P0300Misfiring of random cylinders is detected
Open or short in engine wire harness
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV hose connection
PCV hose
ECM
P0301
P0302
Misfiring of each cylinder is detected
Open or short in engine wire harness
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
P0303
P0304Misfiring of each cylinder is detectedEngine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV hose connection
PCV hose
ECM
HINT:
When the DTCs for misfiring cylinders are recorded repeatedly but no random misfire DTC is recorded, it
indicates that the misfires have been set and recorded at different times.
Reference: Inspection using the oscilloscope
With the engine idling, check the waveform between terminals #10 to #40 and E01 of the ECM connectors.
ItemContents
Terminal#10 to #40 – E01
Equipment Setting20V/Division, 100 or 1 ms/Division
ConditionIdling
HINT:
The correct waveform is as shown.

05–122
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INSPECTION PROCEDURE
HINT:
If any DTCs other than the misfire DTCs are set simultaneously, first troubleshoot them.
If a misfire does not occur when the vehicle is brought to the workshop, a mi\
sfire can be confirmed by
reproducing the condition of the freeze frame data. Also, after finishing repairs, \
confirm that misfires
do not recur (see the confirmation driving pattern).
Read freeze frame data using the intelligent tester II. Freeze frame dat\
a record the engine condition
when malfunctions are detected. When troubleshooting, freeze frame data \
can help determine if the
vehicle was moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean \
or
rich, and other data from the time the malfunction occurred.
On 6 and 8 cylinder engines, misfiring cylinders cannot be identified at\
high engine speed and only
a general misfire DTC P0300 is stored instead of the individual misfiring\
cylinder DTCs (P0301 to
P0308).
If a misfire starts in a high engine speed area or a misfire occurs only i\
n a high engine speed area, only
DTC P0300 may be stored.
When only a general misfire DTC P0300 is stored:
Erase the general misfire DTC from the ECM using the intelligent tester \
II.
Start the engine and perform the confirmation driving pattern.
Check the value of the misfire ratio for each cylinder. Or check the DTC(s).
Perform repairs on the cylinder that has a high misfire ratio. Or repair the cy\
linder indicated by the DTC.
After finishing repairs, perform the confirmation driving pattern again and c\
onfirm that no misfire oc-
curs.
When either of Short FT #1 and Long FT #1 in the freeze frame data is over the range of 20 %, there
is a possibility that the air–fuel ratio is becoming rich (–20 % \
or less) or lean (+20 % or more).
When Coolant Temp in the freeze frame data is less than 80
C (176
F), there is a possibility that mis-
fires occur only during engine warm–up.
If a misfire cannot be reproduced, the following reasons may apply: 1) th\
e vehicle has low fuel, 2) im-
proper fuel is being used, and 3) the ignition plug has been contaminated.
Be sure to check the misfire counter value after repairs.
1 CHECK OTHER DTC OUTPUT(IN ADDITION TO MISFIRE DTCS)
(a) Connect the intelligent tester II to the DLC3.
(b) Turn the ignition switch to ON and turn the intelligent tester ll ON.
(c) Select the following menu items: Powertrain / Engine and ECT / DTC.
(d) Read DTCs. Result:
Display (DTC Output)Proceed To
P0300, P0301, P0302, P0303 and/or P0304A
P0300, P0301, P0302, P0303 or P0304 and other DTCsB
HINT:
If any DTCs other than P0300, P0301, P0302, P0303
or P0304 are output, troubleshoot those DTCs.
B GO TO RELEVANT DTC CHART (See page 05–27 )
A

A18294ECM Connector E13
E01#10 #20 #30
#40
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–127
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
8 INSPECT ECM TERMINAL OF MISFIRING CYLINDER(#10, #20, #30 OR #40
VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the specified terminals of
the E13 ECM connector.
Standard:
Tester ConnectionSpecified Condition
#10 (E13–1) – E01 (E13–7)9 to 14 V
#20 (E13–2) – E01 (E13–7)9 to 14 V
#30 (E13–3) – E01 (E13–7)9 to 14 V
#40 (E13–4) – E01 (E13–7)9 to 14 V
OK Go to step 11
NG
9 INSPECT FUEL INJECTOR RESISTANCE OF MISFIRING CYLINDER
(See page 11–8 of Pub. No. RM1018E AVENSIS)
NG REPLACE FUEL INJECTOR ASSY
(See page 11–10 of Pub. No. RM1018E AVENSIS)
OK

–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–129
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
11 INSPECT FUEL INJECTOR INJECTION AND INJECTION VOLUME OF MISFIRING CYLINDER (See page 11–8 of Pub. No. RM1018E AVENSIS)
NG REPLACE FUEL INJECTOR ASSY
(See page 11–10 of Pub. No. RM1018E AVENSIS)
OK
12 CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER (See page 14–1 of Pub. No. RM1018E AVENSIS)
NG REPAIR OR REPLACE
OK
13 CHECK VALVE CLEARANCE OF MISFIRING CYLINDER (See page 14–6 of Pub. No. RM1018E AVENSIS)
NG ADJUST VALVE CLEARANCE
(See page 14–6 of Pub. No. RM1018E AVENSIS)
OK
14 PROCEED TO STEP APPROPRIATE FOR NUMBER OF MISFIRING CYLINDERS(REFER TO RESULT OF STEP 4)
HINT:
If the result of step 4 is ”1 or 2 cylinders”, proceed to A.
If the result of step 4 is ” 3 cylinders or more”, proceed to B.
B CHECK FOR INTERMITTENT PROBLEMS (See page 05–9 )
A
15 CHECK VALVE TIMING(CHECK FOR LOOSENESS AND JUMPED TEETH ON TIMING CHAIN) (See page 14–49 of Pub. No. RM1018E AVENSIS)
OK: The matchmarks of the crankshaft pulley and camshaft pulley are alig\
ned.
NG ADJUST VALVE TIMING (See page 14–49 of Pub.No. RM1018E AVENSIS)
OK

05–130
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
16 CHECK FUEL PRESSURE (See page 11–5 of Pub. No. RM1018E AVENSIS)
NG CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE AND
FILTER
OK
17 READ VALUE OF INTELLIGENT TESTER II(INTAKE AIR TEMPERATURE AND
MASS AIR FLOW RATE)
(a) Connect the intelligent tester II to the DLC3.
(b) Turn the ignition switch to ON.
(c) Check the intake air temperature.
(1) On the intelligent tester II, select the following menu items: Powertrain / Engine and ECT / Data
List / Intake Air.
(2) Read the value.
Standard: Equivalent to ambient air temperature.
(d) Check the mass air flow rate.
(1) On the intelligent tester II, select the following menu items: Powertrain / Engine and ECT / Data
List / AFM.
(2) Read the values.
Standard:
ConditionMass Air Flow Rate (gm/s)
Ignition switch ON (do not start engine)0
Idling3.2 to 4.7
Revving up without load (2,500 rpm)13.1 to 18.9
Idling – Revving upMass air flow rate fluctuates
NG REPLACE MASS AIR FLOW METER
OK