2005 TOYOTA AVENSIS diagnostic

A81513
5V/
Division
20 msec./Division PRDSignal Waveform
A84835
5V/
Division
20 msec./Division INJFSignal Waveform
05−440
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
(a) Reference: Inspection using the oscilloscope.
During idling, the correct waveform is as shown in the dia-
gram on the left.
Inspection PointSpecified Condition
A and BCorrect waveform is as shown
(b) Reference: Inspection using the oscilloscope.
During idling, the correct waveform is as shown in the dia-
gram on the left.
Inspection PointSpecified Condition
C and DCorrect waveform is as shown
INSPECTION PROCEDURE
HINT:
SAfter completing repairs, confirm that P1271 and/or P1272 is not present again.
SIf P0200 and P1271 are present simultaneously, there is open in the INJF wire harness between the
EDU and ECM, or there is open in the wire harness for both injector and pressure discharge valve.
SRead freeze frame data using the hand−held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the
vehicle was running or stopped, 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.
1READ OUTPUT DTC(DTC P1271AND/OR P1272)
(a) Connect the hand−held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand−held tester ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(d) Read DTCs.
Result:
Display (DTC output)Proceed to
P1271 and/or P1272A
P1272B
B Go to step 8
A

A82883
Pressure Discharge Valve
Component Side:
P3
A81461
E4
Wire Harness Side: EDU Connector
COM3
Front View
A81462
E5
Wire Harness Side:
EDU Connector
PRV
Front View
A81694
P3
Wire Harness Side:Pressure Discharge Valve Connector
Front View
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −44 1
AVENSIS Supplement (RM1045E)
2 INSPECT COMMON RAIL ASSY (PRESSURE DISCHARGE VALVE)
(a) Disconnect the P3 pressure discharge valve connector.
(b) M easur e t he r esist ance bet ween t he t er m inals of t he pressure discharge valve.
Standard: 0.85 to 1.05
at 20 _C (68 _F)
(c) Reconnect the pressure discharge valve connector.
NG REPLACE COMMON RAIL ASSY (PRESSURE DISCHARGE VALVE)
(See page 11− 67)
OK
3 CHECK HARNESS AND CONNECTOR(PRESSURE DISCHARGE VALVE −EDU)
(a) Disconnect the E4 and E5 EDU connectors.
(b) Disconnect the P3 pressure discharge valve connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
COM3 (E4 −7) −(P3 −2)Below1
PRV (E5 −8) −(P3 −1)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
COM3 (E4 −7) or (P3 −2) −Body ground10k
orhigherPRV (E5 −8) or (P3 −1) −Body ground10 k
or higher
(d) Reconnect the EDU connectors.
(e) Reconnect the pressure discharge valve connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

A81462
E5
Wire Harness Side:
EDU Connector
PRD
Front View
A81089ECM Connector E13
PRD
A56874
E4
Wire Harness Side:
EDU Connector
+B (+)
Front View
A80994
E5
Wire Harness Side:
EDU Connector
GND (−)
Front View
05−442
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
4 CHECK HARNESS AND CONNECTOR(EDU−ECM)
(a) Disconnect the E5 EDU connector.
(b) Disconnect the E13 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
PRD (E5−4)−PRD (E13−32)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
PRD (E5−4) or PRD (E13−32)−Body ground10 k
or higher
(d) Reconnect the EDU connector.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
5 INSPECT INJECTOR DRIVER(BATTERY VOLTAGE)
(a) Disconnect the E4 and E5 EDU connectors.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between the specified terminals of
each EDU connector.
Standard:
Tester ConnectionSpecified Condition
+B (E4−8)−GND (E5−1)9to14V
(d) Reconnect the EDU connectors.
NG CHECK INJECTOR DRIVER POWER SOURCE
CIRCUIT (EDU−BATTERY)
OK

A66060
E13
ECM Connector
PRD
E1
E12
A81513
5V/
Division
20 msec./Division
PRD
Signal Waveform
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −443
AVENSIS Supplement (RM1045E)
6 INSPECT ECM(PRD VOLTAGE)
(a) Inspect using the oscilloscope.
(b) Drive the vehicle at 50 km/h (31 mph) with the third gear,
and then decelerate by releasing the accelerator pedal.
(c) Check the waveform between the specified terminal of the E12 and E13 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
PRD (E13 −32) − E1 (E12 −7)Correct waveform is as shown
HINT:
Alternative Inspection:
Run the engine at 2,500 rpm for 10 seconds and then decrease
the engine speed to an idle with the accelerator pedal com-
pletely released.
NG REPLACE ECM (See page 10− 29)
OK
7 REPLACE INJECTOR DRIVER
GO
CHECK IF DTCS OUTPUT RECUR (DTC P 127 1 AND/OR P 1272)
HINT:
P1271:
After clearing the DTC, drive the vehicle at 50 km/h (31 mph) with the third gear and then decelerate by re-
leasing the accelerator pedal. Check that P1271 is not present.
P1272:
After clearing the DTC, start and stop the engine twice, and then confirm that P1272 is not present.
8 REPLACE COMMON RAIL ASSY (PRESSURE DISCHARGE VALVE)
(See page 11− 67)
GO
CHECK IF DTCS OUTPUT RECUR (DTC P 127 1AND/OR P 1272)
HINT:
P1271:
After clearing the DTC, drive the vehicle at 50 km/h (31 mph) with the third gear and then decelerate by re-
leasing the accelerator pedal. Check that P1271 is not present.
P1272:
After clearing the DTC, start and stop the engine twice, and then confirm that P1272 is not present.

A81504
Injector Cross Section Diagram:Piston
Solenoid Valve
Nozzle Needle
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −43 1
AVENSIS Supplement (RM1045E)
DTC P 1238 INJECTOR MALFUNCTION
HINT:
S For more information on the injector and the common rail system, see page 05 −255.
S If P1238 is present, refer to the diagnostic trouble codes (DTCs) table for the fuel system on page
05 −255.
CIRCUIT DESCRIPTION
The ECM detects combustion deterioration for a specific cylin-
der.
HINT:
SThe cylinder, which has compensation value for INJ VOL
that varies from other cylinders, may be malfunctioning.
SIf DTC P0093 (Fuel leaks in high −pressure area) is pres-
ent simultaneously, leakage malfunction of the cylinder
probably be occurred.
SIf DTC P0200 (Open or short in EDU or injector circuit) is
present simultaneously, there probably be faulty circuit lo-
cated between the ECM and the injector including the
EDU.
SIf only DTC P1238 (Injector malfunction) is present, prob-
ably injector mechanical malfunction or insufficient com-
pression (valve clearance etc) has occurred, not an open
or short malfunction of the ECM, EDU and injector circuit.
SSolenoid valve of the injector is the same type that of the
pressure discharge valve.
DTC No.DTC Detection ConditionMain Trouble AreaRelated Trouble Area
P1238Engine speed fluctuation is large when idling
(2 trip detection logic)
S Injector
S EDU (P0200 is set simultaneous-
ly)
S Open or short in engine wire har-
ness (P0200 is set simultaneous-
ly)
S Connector connection (P0200 is
set simultaneously)
S Compression pressure
S Valve clearance
SValve timing
S ECM
HINT:
After confirming DTC P1238, check the internal fuel pressure in ”DIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / COMN RAIL” using the hand −held tester.
Reference:
Engine SpeedFuel Pressure (MPa)
IdlingApproximately 30 to 40
2,500 rpm (No engine load)Approximately 50 to 100
05CQ0 −05

05−432
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
MONITOR DESCRIPTION
P 1238 (Injection malfunction, exclude open or short in injector circuit):
This DTC will be set if the engine speed fluctuation between each cylinder is large. The ECM monitors
changes in the crankshaft rotation speed using the crankshaft position sensor for detecting poor combus-
tion. Also, it identifies a faulty cylinder using the camshaft position sensor. The fluctuation counter incre-
ments when irregular crankshaft rotation speed variation exceeds the threshold at idling. Therefore, either
one of the cylinders has very poor combustion (Rough idle), the ECM sets this DTC.
MONITOR STRATEGY
Required SensorsCrankshaft position sensor
Frequency of operationContinuous
Duration10 minutes
CHK ENG Operation2 driving cycles
TYPICAL ENABLING CONDITIONS
ItemSpecificationItemMinimumMaximum
EngineAt idling
Engine speed500 rpm−
Engine coolant temperature20 _ C (68 _ F)−
TYPICAL MALFUNCTION THRESHOLDS
Threshold
The number of irregular changes in the crankshaft rotation speed
HINT:
The number of irregular changes in the crankshaft rotation speed indicates the insufficient combustion.
WIRING DIAGRAM
Refer to DTC P0200 on page 05 −368.
INSPECTION PROCEDURE
HINT:
SIf DTCs other than P1238 are present simultaneously, first perform troubleshooting for them.
SRead freeze frame data using the hand −held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the
vehicle was running or stopped, 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 CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P 1238)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DTC INFO / CURRENT CODES”.
(d) Read DTCs. Result:
Display (DTC output)Proceed to
P1238A
P1238 and other DTCsB
HINT:
If any other codes besides P1238 are output, perform troubleshooting for those DTCs first.

−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −433
AVENSIS Supplement (RM1045E)
B GO TO RELEVANT DTC CHART
(See page 05 −299)
A
2 CHECK WIRE HARNESS AND CONNECTOR IN ENGINE ROOM
HINT:
Check the wire harness and connector connections. NG REPAIR OR REPLACE
OK
3 READ VALUE OF HAND −HELD TESTER(COMPENSATION OF INJECTION
VOLUME BETWEEN CYLINDERS FOR IDENTIFYING MALFUNCTION CYLINDER)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) Select the item ”DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INJ VOLUME FB #1, #2, #3 and #4”
and read its value displayed on the hand −held tester.
Standard:
ResultCompensatory Injection Volume (mm3)
Standard4.9 or less
HINT:
Usually compensation injection value is 3.0 mm
3or less.
(d) Cylinders that have a compensation value which is more than standard value shown above are consid- ered to be faulty cylinders. Use the following steps to inspect and repair the cylinder.
Result:
ResultProceed to
Faulty cylinder is not identifiedA
Faulty cylinder is identifiedB
B Go to step 5
A
4 PERFORM ACTIVE TEST USING HAND −HELD TESTER(INJECTION CUT FOR
IDENTIFYING MALFUNCTION CYLINDER)
(a) Connect the hand −held tester to the DLC3.
(b) Start the engine.
(c) Turn the hand −held tester ON.
(d) Select the item ”DIAGNOSIS / OBD/MOBD / ACTIVE TEST / INJECTOR CUT #1, #2, #3 and #4”.
(e) Check the four cylinders in sequence to identify a faulty cylinder by performing the power −balance in-
spection.
HINT:
If the engine idling stays normal despite cutting off the fuel injection, the cylinder is malfunctioning.
GO

05−434
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
5 CHECK CYLINDER COMPRESSION PRESSURE OF MALFUNCTION CYLINDER (See page 14− 87)
NG REPAIR OR REPLACE
OK
6 CHECK VALVE CLEARANCE OF MALFUNCTION CYLINDER (See page 14− 90)
NG ADJUST VALVE CLEARANCE
(See page 14− 90)
OK
7 CHECK IF DTC OUTPUT RECURS(DTC P 1238)
HINT:
After clearing the DTC, let the engine idle for 10 minutes after warm −up, and then confirm that P1238 is not
present again.
OK CHECK FOR INTERMITTENT PROBLEMS(See page 05 −270)
NG
8 REPLACE INJECTOR ASSY (See page 11− 46)
GO
CHECK IF DTC OUTPUT RECURS (DTC P 1238)
HINT:
After clearing the DTC, let the engine idle for 10 minutes after warm −up, and then confirm that P1238 is not
present again.