2004 ISUZU TF SERIES Workshop Manual

battery driver seat adjustment ECO mode navigation update compression ratio air bleeding

Load previous 8 pages

Page 2041 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-45
Signal or Continuity Tester Position Pin
No.

B/Box
No.
Pin Function Wire
Color
Key SW
Off Key SW
On Engine
Idle Engine
2000rpmECM
Connec

Page 2042 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-46 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Connector B Port: View Looking Into ECM Cace

Signal or Continuity Tester Position Pin
No. B/Box
No. Pin Function Wire
Color
Key SW O

Page 2043 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-47
Signal or Continuity Tester Position Pin
No. B/Box
No. Pin Function Wire
Color
Key SW Off Key SW On Engine IdleEngine
2000rpm ECM
Connection Ran

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-47
Signal or Continuity Tester Position Pin
No. B/Box
No. Pin Function Wire
Color
Key SW Off Key SW On Engine IdleEngine
2000rpm ECM
Connection Range (+) (-)
B16 B16 Idle Air Control
(IAC) Valve
Coil A Low BLU/
RED Less than 1V Less than 1V / 10-14V Connect DC V B16 GND
B17 B17 Idle Air Control
(IAC) Valve
Coil B Low BLU/
BLKLess than 1V Less than 1V / 10-14V Connect DC V B17 GND
B18 B18 Check Engine
Lamp
(Immobilizer
Control Unit
Terminal B7) BRN/
YELLess than 1V Less than 1VLamp is turned on:
Less than 1V
Lamp is turned off: 10-14VConnect DC V B18 GND
B19 B19 Fuel Pump
Relay GRN/
WHT Less than 1V While relay is
activated:
10-14V
Relay is not
activated:
Less than 1V10-14V Connect DC V B19 GND
B20 B20 Mass Air Flow
(MAF) Sensor BLK/
YELLess than 1V Approx. 0.47VApprox. 1.5V
at 750 rpmApprox. 2V Connect DC V B20 GND
B21 B21 Bank 1 Oxygen
Sensor Signal PNK Less than 1V Approx. 0.4V 0.1 - 0.9V Connect DC V B21 B22
B22 B22 Bank 1 Oxygen
Sensor Ground BLU/
YELContinuity
with ground - - - Connect Ohm B22 GND
B23 B23 Bank 2 Oxygen
Sensor Signal RED Less than 1V Approx. 0.4V 0.1 - 0.9V Connect DC V B23 B24
B24 B24 Bank 2 Oxygen
Sensor Ground BLU/
BLKContinuity
with ground - - - Connect Ohm B24 GND
B25 B25 To Data Link
Connector
No.6 BLK/
GRN - - - - - - - -
B26 B26 Throttle
Position
Sensor (TPS)
Signal BLU Less than 1V Approx. 0.5V Approx. 0.6V Connect DC V B26 B39
B27 B27 TPS & Cam
Position
Sensor +5V
Supply GRN Less than 1V Approx. 5V Connect DC V B27 B39
B28 B28 Camshaft
Position (CMP)
Sensor Signal BLU - - Wave form - - - -
B29 B29 Inhibitor Switch
(AT Only) BLK Less than 1V P or N range: Less than 1V
Other than P or N range: 10-14V Connect DC V B29 GND
B30 B30 Power Steering
Pressure
Switch GRN/
YELLess than 1V Pressure switch is turned on: Less than 1V
Pressure Switch is turned off: 10-14V Connect DC V B30 GND
B31 B31 A/C Thermo
Relay GRN/
BLKLess than 1V A/C request is activated: 10-14V
A/C request is not activated: Less than 1VConnect DC V B31 GND

Page 2044 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-48 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Signal or Continuity Tester Position Pin
No. B/Box
No. Pin Function Wire
Color
Key SW Off Key SW On Engine IdleEngine
2000rpm ECM
Connection Ran

Page 2045 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-49
Camshaft Position (CMP) Sensor Reference Wave Form

0V

Measurement Terminal:

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-49
Camshaft Position (CMP) Sensor Reference Wave Form

0V

Measurement Terminal: B28(+) B39(-)
Measurement Scale: 5V/div 10ms/div
Measurement Condition: Approximately 2000rpm
Crankshaft Position (CKP) Sensor Reference Wave Form

0V

Measurement Terminal: A23(+) A25(-)
Measurement Scale: 2.0V/div 5ms/div
Measurement Condition: Approximately 2000rpm
Crankshaft Position (CKP) Sensor & Camshaft Position (CMP)
Sensor Reference Wave Form

CH1
0V

CH2
0V

Measurement Terminal: CH1: A23(+) / CH2: B28(+) GND(-)
Measurement Scale: 2V/div / CH2: 5V/div 10ms/div
Measurement Condition: Approximately 2000rpm
Crankshaft Position (CKP) Sensor & Tacho Output Signal
Reference Wave Form

CH1
0V

CH2
0V

Measurement Terminal: CH1: A23(+) / CH2: B12(+) GND(-)
Measurement Scale: CH1: 2V/div / CH2: 10V/div 5ms/div
Measurement Condition: Approximately 2000rpm
Vehicle Speed Sensor (VSS) Reference Wave Form

CH1
0V

CH2
0V

Measurement Terminal: CH1: ECM B32(+) / CH2: VSS 3(+)
GND(-)
Measurement Scale: CH1: 10V/div / CH2: 10V/div 50ms/div
Measurement Condition: Approximately 20km/h
Note: The vehicle is without immobilizer system,
CH1 signal is same as CH2.
Heated Oxygen Sensor (HO2S) Reference Wave Form

CH1
0V

CH2
0V

Measurement Terminal: CH1: B21(+) / CH2: B23(+) GND(-)
Measurement Scale: CH1: 500mV/div / CH2: 500mV/div 1s/div
Measurement Condition: Approximately 2000rpm in Closed Loop

Page 2046 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-50 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Injector Control Signal Reference Wave Form

0V

Measurement Terminal: A36(+) (No.1 Cylinder) GND(-)
Measur

Page 2047 of 4264

ISUZU TF SERIES 2004 Workshop Manual 3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-51

GENERAL DESCRIPTION FOR ECM AND
SENSORS
Engine Control Module (ECM)

1 2
(1) A Port
(2) B Port

The engine control module (ECM) is loca

Page 2048 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6E-52 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Mass Air Flow (MAF) Sensor & Intake Air
Temperature (IAT) Sensor

The MAF sensor is part of the intake air system.
It is fitted between the a

6E-52 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Mass Air Flow (MAF) Sensor & Intake Air
Temperature (IAT) Sensor

The MAF sensor is part of the intake air system.
It is fitted between the air cleaner & throttle body and
measure the mass air flowing into the engine.
The MAF sensor uses a hot wire element to determine
the amount of air flowing into the engine. (The wire
temperature reaches to 170 - 300C)
The MAF sensor assembly consist of a MAF senso
r
element and an intake air temperature sensor that are
both exposed to the air flow to be measured.
The MAF sensor element measures the partial air mass
through a measurement duct on the sensor housing.
Using calibration, there is an extrapolation to the entire
mass air flow to the engine.

The IAT sensor is a thermistor. A temperature changes
the resistance value. And it changes voltage. In othe
r
words it measures a temperature value. Low air
temperature produces a high resistance.
The ECM supplies 5 volts signal to the IAT senso
r
through resisters in the ECM and measures the voltage.
The signal voltage will be high when the air temperature
is cold, and it will be low when the air temperature is
hot. Throttle Position Sensor (TPS)

1
2
(1) Throttle Position Sensor (TPS)
(2) Idle Air Control Valve (IACValve)

The TPS is a potentiometer connected to throttle shaf
t
on the throttle body.
The engine control module (ECM) monitors the voltage
on the signal line and calculates throttle position. As the
throttle valve angle is changed when accelerator pedal
moved. The TPS signal also changed at a moved
throttle valve.
As the throttle valve opens, the output
increases so that the output voltage should be high.

The throttle body has a throttle plate to control the
amount of air delivered to the engine. Engine coolant is
directed through a coolant cavity in the throttle body to
warm the throttle valve and to prevent icing.
Charac teristic of IA T Sens or
10 100 1000 10000 100000-3010 50 90130Temper atur e (
)
Resistance (Ω)

Load next 8 pages

Page: < prev 1-10 ... 2009-2016 2017-2024 2025-2032 2033-2040 2041-2048 2049-2056 2057-2064 2065-2072 2073-2080 ... 4264 next >

oil capacities sunroof trunk release remote start towing radio controls