2007 ISUZU KB P190 sensor

Engine Management – V6 – Diagnostics Page 6C1-2–217

Low Reference 2.2 – 2.7 V
Pump Current Less than 0.5 A
Input Pump Current Less than 0.5 A
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2 This step determines if the condition exists. The HO2S lambda parameter should react immediately to the changes in throttle position when performing this test.
5 This step determines if there is a condition with the pumping current circuit. Connecting a jumper wire between the reference voltage and the low reference circuits causes the ECM to command the pumping current and the input
pumping current circuits.
DTC P2626, P2627, P2628, P2629, P2630 or P2631 Diagnostic Table
Step Action Value(s) Yes No
1
Has the Diagnostic System Check been completed? —
Go to Step 2 Refer to
4.4 Diagnostic System Check
2 1 Start engine and allow to reach operating
temperature.
2 Cycle the throttle from idle to wide open throttle (W OT), 3 times within 5 seconds.
3 Use Tech 2 to observe the affected HO2S lambda value
Does the affected HO2S lambda value react
immediately to the above action? —
Go to Step 3 Go to Step 4
3 1 Observe the Freeze Frame / Failure Records for
this DTC.
2 Turn OFF the ignition 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 / Failure Records.
Does P2626 P2627, P2628, P2629, P2630 or P2631
fail this ignition? —
Go to Step 4 Go to Additional
Information in this DTC
4
Is DTC P0131, P0132, P0151 or P0152 also set? —
Go to the
appropriate DTC Table in this Section Go to Step 5
5 1 Ignition OFF.
2 Disconnect the appropriate heated oxygen sensor (HO2S).
3 Ignition ON, engine OFF.
4 Connect a 3-amp fused jumper wire between the reference voltage circuit and the low reference
circuit of the HO2S.
5 Measure the voltage between the pump current circuit and a good ground.
Is the voltage more than the specified value? 1.0 V
Go to Step 7 Go to Step 6

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ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–224

Ignition ON:
• Engine stopped, ignition in the ON position.
• Closed throttle.
• Transmission selector in the Park position (Automatic
Transmission) or Neutral (Manual Transmission.
• Engine, transmission at ambient temperature.
• Accessories are OFF.
• Brake pedal is not applied.
Engine Running
• Engine running.
• Closed throttle.
• Transmission selector in the Park position (Automatic
Transmission) or Neutral (Manual Transmission.
• Engine, transmission at normal operating temperature.
• Accessories are OFF.
• Brake pedal not applied.
NOTE
The values quoted in the following data lists are
only intended to provide the Technician with an
indication of the values to be expected.
W hen ‘F1 Data Display’ is selected, there are 12 data lists provided, that can save time when diagnosing symptomatic
conditions.
Engine Data 1
Engine Data 2
EVAP Data
Fuel Trim Data
O2 Sensor Data
TAC Data (Throttle Actuator Control)
Cooling/HVAC Data
Cruise Control Data
Electrical/Theft Data
Instrument Data
ODM Data (Output Driver Module)
Misfire Data
F2: OBD Data
In this test mode, Tech 2 displays engine management data parameters relating to the OBD (On Board Diagnostic) for
the engine being diagnosed. Refer to 8.5 OBD Data for specific detail.
F3: Snapshot
In this test mode, Tech 2 captures data before and after a snapshot triggering event that may or may not set a DTC.
F4: Actuator Test
In this test mode, Tech 2 performs software override commands to the ECM, to assist in problem isolation during
diagnostics. W hen entering this mode, there are 9 actuators that can be tested for operational integrity. The 9 tests
available are:
F0: Fuel Pump Relay Test
F1: Electronic Throttle Control Test
F2: A/C Relay Test
F3: Cooling Fan PW M
F4: Alternator L Terminal

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ISUZU KB P190 2007

Engine Management – V6 – Diagnostics Page 6C1-2–226

8.3 HFV6 Engine Data Lists
Engine Data 1
Tech 2 Display Units Displayed Ignition On Engine Running
Engine Speed RPM 0 1077
Desired Engine Idle Speed RPM 830 1090
Coolant Temperature °C 21 27
Intake Air Temperature °C 31 24
Mass Air Flow g/s 0.00 7.28
Engine Load % 100 30
Volumetric Efficiency % 99 23
Calculated Pedal Position % 0 0
Desired Throttle Position % 4 4
Calculated Throttle Position % 6 4
Barometric Pressure kPa 100 100
Barometric Pressure V 4.78 4.78
Loop Status B1S1 (Bank 1 Sensor 1) Open / Closed Open Closed
Loop Status B2S1 (Bank 2 Sensor 1) Open / Closed Open Closed
B1S1 O2 Sensor (Bank 1 Sensor 1) :1 (= Lambda) 1.0 1.0
B1S2 O2 Sensor (Bank 1 Sensor 2) mV 442 460
B2S1 O2 Sensor (Bank 2 Sensor 1) :1 (= Lambda) 1.0 1.0
B2S2 O2 Sensor (Bank 2 Sensor 2) mV 442 477
B1 Short Term Fuel Trim (Bank 1) % 0 -1
B1 LTFT Idle/Deceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B1 LTFT Cruise/Acceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B2 Short Term Fuel Trim (Bank 2)
% 0 –1
B2 LTFT Idle/Deceleration (Bank 2 Long Term Fuel
Trim) % 0 0
B2 LTFT Cruise/Acceleration (Bank 2 Long Term Fuel
Trim) % 0 0
(2) Transmission Gear
P-N / In Gear P-N P-N
EVAP Purge Solenoid (Evaporative Emission)
% 0 0
Fuel Level L 21 20
Spark Advance °CA 0 9
B1 Knock Sensor Signal (Bank 1) V 3.6 0.3
B2 Knock Sensor Signal (Bank 2) V 3.6 0.3
Knock Retard °CA 0 0
Knock Retard Cylinder 1 °CA 0 0
Knock Retard Cylinder 2 °CA 0 0

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Engine Management – V6 – Diagnostics Page 6C1-2–227

Knock Retard Cylinder 3 °CA 0 0
Knock Retard Cylinder 4 °CA 0 0
Knock Retard Cylinder 5 °CA 0 0
Knock Retard Cylinder 6 °CA 0 0
Ignition Accessory Signal Off / On On On
Ignition On Signal Off / On On On
Malfunction Indicator (MI) Off / On / Flashing On Off
Fuel Pump Relay Off / On Off On
Engine Control Ignition Relay Off / On On On
Engine Control Ignition Relay Feedback V 11.5 14.1
(1) Actual Gear -1- / -2- / -3- / -4- / -
5- / -P/N- / -R- / -Invalid- -P/N- -P/N-
Brake Lamp Switch
Inactive / Active Inactive Inactive
Reduced Engine Power Inactive / Active Inactive Inactive
DTC Set This Ignition No DTC / DTC Set No DTC No DTC
Vehicle Speed km/h 0 0
Engine Runtime h:m:s 00:00:00 00:05:20
(2) Clutch Pedal Switch Inactive / Active Inactive Inactive
(1) Automatic Transmission Only (2) Manual Transmission Only
Engine Data 2
Tech 2 Display
Units Displayed Ignition On Engine Running
Engine Speed RPM 0 751
Desired Engine Idle Speed RPM 830 750
Coolant Temperature °C 21 78
Cooling Fan On/Off Off On
Calculated ECT – Closed Loop Fuel Control (Engine
Coolant Temperature) °C 21 37
Calculated ECT – Thermostat Diagnosis (Engine
Coolant Temperature) °C 22 78
Intake Air Temperature
°C 31 27
Start Up ECT (Engine Coolant Temperature) °C 21 21
Start Up IAT (Intake Air Temperature) °C –48 30
Mass Air Flow Sensor V 1.00 1.3
Mass Air Flow g/s 0.00 5.47
Engine Load % 100 25
Volumetric Efficiency % 99 19
Power Enrichment No / Yes No No
Dec. Fuel Cutoff (Deceleration) Inactive / Active Inactive Inactive
Calculated Pedal Position % 0 0

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Engine Management – V6 – Diagnostics Page 6C1-2–228

Desired Throttle Position % 4 3
Calculated Throttle Position % 6 3
Barometric Pressure kPa 100 100
Barometric Pressure V 4.78 4.80
Loop Status B1S1 (Bank 1 Sensor 1) Open / Closed Open Closed
Loop Status B2S1 (Bank 2 Sensor 1) Open / Closed Open Closed
B1 Short Term Fuel Trim (Bank 1) % 0 –3
B1 LTFT Idle/Deceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B1 LTFT Cruise/Acceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B2 Short Term Fuel Trim (Bank 2)
% 0 –1
B2 LTFT Idle/Deceleration (Bank 2 Long Term Fuel
Trim) % 0 0
B2 LTFT Cruise/Acceleration (Bank 2 Long Term Fuel
Trim) % 0 0
Injection Time Cylinder 1
ms 0.0 2.5
Injection Time Cylinder 2 ms 0.0 2.5
Injection Time Cylinder 3 ms 0.0 2.5
Injection Time Cylinder 4 ms 0.0 2.5
Injection Time Cylinder 5 ms 0.0 2.5
Injection Time Cylinder 6 ms 0.0 2.5
Spark Advance °CA 0 12
Ignition Accessory Signal Off / On On On
Ignition On Signal Off / On On On
(1) Transmission Gear P-N / In Gear P-N P-N
(1) Actual Gear -1- / -2- / -3- / -4- / -
5- / -P/N- / -R- / -Invalid- -P/N- -P/N-
Fuel Pump Relay
Off / On Off On
A/C Relay (Air Conditioning) Off / On Off Off
(1) Transmission Gear Selector Signal Valid / Invalid Valid
Valid
Distance Since DTC Cleared km 0 0
Reduced Engine Power Inactive / Active Inactive Inactive
Vehicle Speed km/h 0 0
Engine Runtime h:m:s 00:00:00 00:09:20
(1) Automatic Transmission Only (2) Manual Transmission Only

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Engine Management – V6 – Diagnostics Page 6C1-2–229


EVAP Data
Tech 2 Display Units Displayed Ignition On Engine Running
EVAP Purge Solenoid (Evaporative Emission) % 0 31
Fuel Level L 21 20
Fuel Level Sensor V 1.24 1.25
Time Since Engine Off h:m:s 00:00:01 00:00:01
Engine Speed RPM 0 748
Desired Engine Idle Speed RPM 830 750
Coolant Temperature
°C 21 91
Start Up ECT (Engine Coolant Temperature)
°C 21 21
Start Up IAT (Intake Air Temperature)
°C –48 30
Intake Air Temperature
°C 31 30
Mass Air Flow Sensor
V 1.0 1.3
Engine Load % 100 23
Volumetric Efficiency % 99 18
Calculated Pedal Position % 0 0
Desired Throttle Position % 4 2
Calculated Throttle Position % 6 2
Barometric Pressure kPa 100 100
Loop Status B1S1 (Bank 1 Sensor 1) Open / Closed Open Closed
Loop Status B2S1 (Bank 2 Sensor 1) Open / Closed Open Closed
B1S1 O2 Sensor (Bank 1 Sensor 1) :1 (=Lambda) 1.0 23
B2S1 O2 Sensor (Bank 2 Sensor 1) :1 (=Lambda) 1.0 16
B1 Short Term Fuel Trim (Bank 1) % 0 –2
B1 LTFT Idle/Deceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B1 LTFT Cruise/Acceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B1 Total Fuel Trim (Bank 1)
% 0 -4
B2 Short Term Fuel Trim (Bank 2) % 0 0
B2 LTFT Idle/Deceleration (Bank 2 Long Term Fuel
Trim) % 0 0
B2 LTFT Cruise/Acceleration (Bank 2 Long Term Fuel
Trim) % 0 0
B2 Total Fuel Trim (Bank 2)
% 0 1
Fuel Trim Learn Disabled / Enabled Disabled Disabled
Ignition Accessory Signal Off / On On On
Ignition On Signal Off / On On On
DTC Set This Ignition No DTC / DTC Set No DTC No DTC

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Engine Management – V6 – Diagnostics Page 6C1-2–230

Vehicle Speed km/h 0 0
Engine Runtime h:m:s 00:00:00 00:10:25
Fuel Pump Relay Off / On Off On
(1) Automatic Transmission Only (2) Manual Transmission Only
Fuel Trim Data
Tech 2 Display Units Displayed Ignition On Engine Running
B1 Short Term Fuel Trim (Bank 1) % 0 –1
B1 LTFT Idle/Deceleration (Bank 1 Long Term Fuel
Trim) % 0 1
B1 LTFT Cruise/Acceleration (Bank 1 Long Term Fuel
Trim) % 0 0
B1 Total Fuel Trim (Bank 1)
% 0 4
B2 Short Term Fuel Trim (Bank 2) % 0 0
B2 LTFT Idle/Deceleration (Bank 2 Long Term Fuel
Trim) % 0 1
B2 LTFT Cruise/Acceleration (Bank 2 Long Term Fuel
Trim) % 0 0
B2 Total Fuel Trim (Bank 2)
% 0 4
Fuel Trim Learn Disabled / Enabled Disabled Disabled
Loop Status B1S1 (Bank 1 Sensor 1) Open / Closed Open Closed
Loop Status B2S1 (Bank 2 Sensor 1) Open / Closed Open Closed
Injection Time Cylinder 1 ms 0.0 2.5
Injection Time Cylinder 2 ms 0.0 2.5
Injection Time Cylinder 3 ms 0.0 2.5
Injection Time Cylinder 4 ms 0.0 2.5
Injection Time Cylinder 5 ms 0.0 2.5
Injection Time Cylinder 6 ms 0.0 2.5
Requested Torque % 99 99
Catalyst Protection Mode Inactive / Active Inactive Inactive
B1 Catalyst Temperature (Bank 1)
°C 300 300
B2 Catalyst Temperature (Bank 2)
°C 300 300
B1S1 O2 Sensor (Bank 1 Sensor 1)
:1 (= Lambda) 0.99 0.99
B1S2 O2 Sensor (Bank 1 Sensor 2) mV 438 520
B2S1 O2 Sensor (Bank 2 Sensor 1) :1 (= Lambda) 0.99 0.99
B2S2 O2 Sensor (Bank 2 Sensor 2) mV 438 516
B1 Average Injection Time (Bank 1) ms 0.0 2.5
B2 Average Injection Time (Bank 2) ms 0.0 2.5
Power Enrichment No / Yes No No
Dec. Fuel Cutoff (Deceleration) Inactive / Active Inactive Inactive
EVAP Purge Solenoid (Evaporative Emission) % 0 32

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Engine Management – V6 – Diagnostics Page 6C1-2–231

Engine Speed RPM 0 592
Coolant Temperature
°C 39 91
Intake Air Temperature
°C 32 26
Start Up ECT (Engine Coolant Temperature)
°C 39 34
Start Up IAT (Intake Air Temperature)
°C –48 30
Mass Air Flow Sensor
V 1.0 1.2
Engine Load % 100 22
Volumetric Efficiency % 99 15
Calculated Pedal Position % 0 0
Calculated Throttle Position % 5 1
Barometric Pressure kPa 102 102
Barometric Pressure V 4.88 4.88
Spark Advance
°CA 0 12
Ignition On Signal
Off / On On On
(1) Actual Gear -1- / -2- / -3- / -4- / -
5- / -P/N- / -R- / -Invalid- -P/N- -P/N-
DTC Set This Ignition
No DTC / DTC Set No DTC No DTC
Vehicle Speed km/h 0 0
Engine Runtime h:m:s 00:00:00 00:12:30
Ignition Accessory Signal Off / On On On
Mass Air Flow g/s 0.00 3.33
(1) Automatic Transmission Only (2) Manual Transmission Only
O2 Sensor Data
Tech 2 Display Units Displayed Ignition On Engine Running
Loop Status B1S1 (Bank 1 Sensor 1) Open / Closed Open Closed
Loop Status B2S1 (Bank 2 Sensor 1) Open / Closed Open Closed
Commanded B1S1 O2 Sensor Value (Bank 1 Sensor 1) :1 (= Lambda) 0.99 0.94
Commanded B2S1 O2 Sensor Value (Bank 2 Sensor 1) :1 (= Lambda) 0.99 0.94
B1S1 O2 Sensor (Bank 1 Sensor 1) :1 (= Lambda) 0.99 0.94
B1S2 O2 Sensor (Bank 1 Sensor 2) mV 438 538
B2S1 O2 Sensor (Bank 2 Sensor 1) :1 (= Lambda) 0.99 0.99
B2S2 O2 Sensor (Bank 2 Sensor 2) mV 438 486
B1S1 O2 Sensor Heater (Bank 1 Sensor 1) Ohm 540 80
B2S1 O2 Sensor Heater (Bank 2 Sensor 1) Ohm 540 80
Commanded B1S1 O2 Sensor Heater (Bank 1 Sensor 1) % 0.0 42.0
Commanded B2S1 O2 Sensor Heater (Bank 2 Sensor 1) % 0.0 42.0
B1 Short Term Fuel Trim (Bank 1) % 0 –1
B1 LTFT Idle/Deceleration (Bank 1 Long Term Fuel
Trim) % 0 1

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