Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Tundra 2000-2006 Approved 04-06 techinfo.toyota.com ileaf 06toyrm 06toypdf 06rmsrc 06tundra di eg1grfe cip04204
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download cip04204 documenatation <<
Text preview - extract from the document
DI-228
DIAGNOSTICS - ENGINE (1GR-FE)
DIDTO-01
DTC P0420 Catalyst System Efficiency Below Threshold
(Bank 1)
DTC P0430 Catalyst System Efficiency Below Threshold
(Bank 2)
MONITOR DESCRIPTION
The ECM uses the two sensors, mounted in front of and behind the Three-way Catalytic Converter (TWC),
to monitor its efficiency.
The first sensor, the Air-Fuel Ratio (A/F) sensor (sensor 1), sends pre-catalyst information to the ECM. The
second sensor, the Heated Oxygen (HO2) sensor (sensor 2), sends post-catalyst information to the ECM.
The ECM compares the information transmitted by these two sensors to determine the efficiency of the TWC
performance and its ability to store oxygen.
When the TWC is functioning properly, the variation in the oxygen concentration in the exhaust gas, after
it has passed through the TWC, is small. In this condition, the voltage output of sensor 2 slowly alternates
between the rich and lean signal voltages (shown in the illustration below). As the TWC performance efficien-
cy deteriorates, its oxygen storage capacity decreases, and the variation in the oxygen concentration in the
exhaust gas increases. As a result, the sensor voltage output fluctuates frequently.
While the catalyst monitor is running, the ECM measures the signal lengths of both sensors 1 and 2, and
calculates the ratio of the signal lengths to determine the extent of the TWC deterioration. If the deterioration
level exceeds the preset threshold, the ECM interprets this as the TWC malfunction. The ECM then illumi-
nates the MIL and sets the DTC.
DTC No. DTC Detecting Condition Trouble Area
After engine and catalyst are warmed up, and while vehicle is
S Gas leakage on exhaust system
P0420 driven within set vehicle and engine speed range, each wave-
S Heated oxygen sensor (bank 1, 2 sensor 1, 2)
P0430 form of heated oxygen sensors has same amplitude
S Three-way catalytic converter
(2 trip detection logic)
HINT:
S Bank 1 refers to the bank that includes cylinder No.1.
S Bank 2 refers to the bank that does not include cylinder No.1.
S Sensor 1 refers to the sensor closest to the engine assembly.
S Sensor 2 refers to the sensor farthest away from the engine assembly.
MONITOR STRATEGY
P0420 Bank 1 catalyst is deteriorated
Related DTCs
R l t d DTC
P0430 Bank 2 catalyst is deteriorated
Main sensors/components Front and rear heated oxygen sensor
Mass air flow meter, Engine coolant temperature
Required sensors/components
Related sensors/components sensor, Engine speed sensor, Intake air tempera-
ture sensor
Frequency of operation Once per driving cycle
Duration 30 sec.
MIL operation 2 driving cycles
Sequence of operation None
DI-229
DIAGNOSTICS - ENGINE (1GR-FE)
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever these
See page DI-18
DTCs are not present
Battery voltage 11 V -
IAT -10_C (14_F) -
ECT 75◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo