Engine Management – V6 – Diagnostics Page 6C1-2–190
5 1 Start the engine.
NOTE
Additional DTCs will set when the MAF
sensor is disconnected.
2 Disconnect the mass air flow (MAF) sensor harness connector while the engine is operating.
3 Observe the Short Term FT parameter for Bank 1 and bank 2 with Tech 2.
4 Reconnect the MAF sensor after completing this step.
Does the Short Term FT parameter for both banks of
the engine change more than the specified value with
the MAF sensor disconnected? 20%
Go to 7.6
DTC
P0101, P0102 or P0103 in this Section Go to Step 6
6 1 Inspect for the following conditions:
− A collapsed air intake duct
− A restricted air filter element
− The MAF sensor for foreign objects
− Excessive fuel in the crankcase – Change
the oil as necessary.
− Contaminated fuel. Refer to 6.5 Alcohol /
Contaminants in Fuel Diagnosis in this
Section.
− The ECM grounds for being clean, tight,
and in the correct locations
− An engine mechanical condition – refer to
6A1 – Engine Mechanical V6.
Did you find and correct the condition? —
Go to Step 8 Go to 6C Fuel
System – V6
7 1 Inspect for the following conditions:
− Rich injectors – refer to 6.2 Fuel
Injector Coil Test in this Section
− Restricted exhaust system – refer to 6F
Exhaust System – V6
− An engine mechanical condition – refer to
6A1 – Engine Mechanical V6.
Did you find and correct the condition? —
Go to Step 8 Go to Additional
Information in this Section.
8 1 Switch off the ignition for 30 seconds.
2 Using Tech 2, clear the DTCs and reset the fuel trim system.
3 Operate the vehicle within the Conditions for Running the DTC. You may also operate the
vehicle within the conditions that you observed
from the Freeze Frame / Failure Records.
Did DTC P2178 and / or P2180 fail this ignition cycle? —
Go to Step 2 Go to Step 9
9 1 Using Tech 2, select the DTC display function.
Does Tech 2 display any DTCs? —
Go to the
appropriate DTC Table in this Section System OK
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ISUZU KB P190 2007
Engine Management – V6 – Diagnostics Page 6C1-2–196
3 1 Observe the Freeze Frame and / or the Failure
Records data for this DTC.
2 Turn the ignition OFF for 30 seconds.
3 Start the engine.
4 Operate the vehicle within the Conditions for Running the DTC. You may also operate the
vehicle within the conditions that you observed
from the Freeze Frame and / or the Failure
Records data.
Does the DTC fail this ignition cycle? —
Go to Step 4 Go to Additional
Information in this DTC.
4 Are both banks of the engine operating rich? —
Go to Step 5 Go to Step
5 1 Start the engine.
NOTE
Additional DTCs will set with the mass air
flow (MAF) sensor disconnected.
2 Disconnect the MAF sensor harness connector while the engine is operating.
3 Observe the Short Term FT parameter for Bank 1 and Bank 2 with Tech 2.
4 Connect the MAF sensor after completing this step.
Does the Short Term FT parameter for both banks of
the engine change more than the specified value with
the MAF sensor disconnected? 20%
Go to 7.6
DTC
P0101, P0102 or P0103 Go to Step 5
6 1 Inspect for the following conditions:
− A collapsed air intake duct
− A restricted air filter element
− Inspect the MAF sensor for foreign
objects.
− Excessive fuel in the crankcase – Change
the oil as necessary.
− Contaminated fuel. Refer to 6.5 Alcohol /
Contaminants in Fuel Diagnosisin this
Section.
− The engine control grounds for being
clean, tight, and in the correct locations
− An engine mechanical condition – refer to
6A1 – Engine Mechanical V6.
Did you find and correct the condition? —
Go to Step 8 Go to 6C Fuel
System – V6
7 1 Inspect for the following conditions:
− Rich injectors – Refer to 6.2 Fuel
Injector Coil Test in this Section
− Restricted exhaust system – Refer to 6F
Exhaust System – V6.
− An engine mechanical condition – refer to
6A1 – Engine Mechanical V6.
Did you find and correct the condition? —
Go to Step Go to Additional
Information in this DTC
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ISUZU KB P190 2007
Engine Management – V6 – Service Operations Page 6C1-3–6
Basic Diagnostic Tools Required
Use of incorrect electrical circuit diagnostic
tools when performing certain service
procedures could result in incorrect
diagnostic results or damage to components.
The following electrical circuit testing tools are required to perform the diagnostic procedures detailed in this Section:
• Test lamp, refer to 8A Electrical – Body and Chassis for further information.
• Digital multimeter with 10 M Ω ohms impedance, refer to 8A Electrical – Body and Chassis for further information.
• Connector test adapter kit Tool No. J35616-A.
1.3 Service Operations Not Covered In This
Section
There are situations where components and/or procedures related to the powertrain management system are covered in
other Sections of the service documentation. To aid technicians in locating the necessary service procedures for these
components and/or procedures, refer to the stated references.
Air-conditioning System
For A/C pressure switch replacement procedure, refer to 2A Heater and Air-conditioning.
Electrical Components
For the following electrical system component replacement procedures, refer to the appropriate Sections as follows:
• Extended brake pedal travel switch and stop lamp switch service operations, refer to 5C Brakes.
• Fuse and relay locations, refer to 8A Electrical-Body and Chassis.
• Cruise control switch assembly service operations, refer to 8C Cruise Control – HFV6.
• Powertrain interface module PIM removal and installation procedure, refer to 6E1 Powertrain Interface Module – V6.
• Neutral start and back-up lamp switch, refer to 7C4 Automatic Transmission – 4L60E – On-vehicle Servicing.
• Vehicle speed sensor service operations, refer to:
− 7C4 Automatic Transmission – 4L60E – On-vehicle Servicing
− 7B1 Manual Transmission – V6
Fuel System
For the following fuel system component replacement procedures, refer to 6C Fuel System – V6.
• Fuel system cleaning,
• Fuel system leak and pressure test,
• Fuel feed hose to fuel rail replacement,
• Fuel line quick connect fittings,
• Evaporative emission control canister,
• Fuel filter,
• Fuel hose / pipes layout,
• Fuel pump motor assembly and fuel pressure regulator assembly,
• Fuel sender assembly service operations.
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ISUZU KB P190 2007
