2005 TOYOTA AVENSIS Service Repair Manual

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Page 4425 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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

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.

Page 4426 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual −
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

Page 4427 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 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 REPLA

Page 4428 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81017
Generator (Alternator)Glow Plug
ECM
Glow
Plug
Relay
Battery
Duty Ratio
05
−426
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
DTC P0622 GENERATOR F

Page 4429 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A80456
E13
ALT
ECM Connector
A81490
A11
Wire Harness Side: Generator (alternator) Connector
Front View
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
05 −427
AVENSIS Supplement (RM104

Page 4430 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual 05−428
−
DIAGNOSTICS ECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
3 INSPECT DRIVE BELT (See page 14− 87)
NG REPAIR OR REPLACE DRIVE BELT
(See page 14− 269 of Pub.

Page 4431 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual −
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −425
AVENSIS Supplement (RM 1045E)
DTC P0606 ECM/PCM PROCESSOR
DTC P0607 CONTROL MODULE PERFORMANCE
DTC P 1611 IC CIRCUIT MALFUNCTI

Page 4432 of 5135

TOYOTA AVENSIS 2005 Service Repair Manual A81010
12
E10
2 Engine Room R/B No. 1
IE37
BATT
Battery BB
33
FL MAIN1
1A
1 Engine Room R/B No. 3
EFI
IO17
B−YECM
(LHD) (RHD)
B−R (LHD)
B−Y (RHD)
05−422
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(F

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