2004 ISUZU TF SERIES oil temperature

6B-6 ENGINE COOLING (6VE1 3.5L)
Draining and Refilling Cooling
System
Before draining the cooling system, inspect the system
and perform any necessary service to ensure that it is
clean, does not leak and is in proper working order.
The engine coolant (EC) level should be between the
“ MIN" and “MAX" lines of reserve tank when the engine
is cold. If low, check for leakage and add EC up to the
“ MAX" line.
There should not be any excessive deposit of rust o
r
scales around the radiator cap or radiator filler hole, and
the EC should also be free from oil.
Replace the EC if excessively dirty.
1. Completely drain the cooling system by opening the
drain plug at the bottom of the radiator.




P1010064
2. Remove the radiator cap.
WARNING: To avoid the danger of being burned, do
not remove the cap while the engine and radiato
r
are still hot. Scalding fluid and steam can be blown
out under pressure.
3. Disconnect all hoses from the EC reserve tank.
Scrub and clean the inside of the reserve tank with
soap and water. Flush it well with clean water, then
drain it. Install the reserve tank and hoses.
4. Refill the cooling system with the EC using a
solution that is 50 percent antifreeze.
Procedure for filling with coolant (in case of full change)
 Make sure that the engine is cool.
 Open radiator cap pour coolant up to filler neck.
 Pour coolant into reservoir tank up to “MAX" line.

 Tighten radiator cap and start the engine. Afte
r
idling for 2 to 3 minutes, stop the engine and reopen
radiator cap. If the water level is lower, replenish.
WARNING: When the coolant is heated to a high
temperature, be sure not to loosen or remove the
radiator cap. Otherwise you might get scalded by
not vapor or boiling water. To open the radiato
r
cap, put a piece of thick cloth on the cap and
loosen the cap slowly to reduce the pressure when
the coolant has become cooler.

After tightening radiator cap, warm up the engine at
about 2000 rpm. Set heater adjustment to the
highest temperature position, and let the coolan
t
circulate also into heater water system.
 Check to see the thermostat has opened through
the needle position of water thermometer, conduct a
5 –minute idling again and stop the engine.
 When the engine has been cooled, check filler neck
for water level and replenish if required. Should
extreme shortage of coolant is found, check the
cooling system and reservoir tank hose for leakage.
 Pour coolant into the reservoir tank up to “MAX"
line.

ENGINE COOLING (6VE1 3.5L) 6B-13
6. Connect oil cooler hose to automatic transmission.




RTW36BSH000101
7. Connect battery ground cable.
8. Pour engine coolant up to filler neck of radiator, and
up to MAX mark of reserve tank.




RTW36BSH000101
Important operation (in case of 100% engine
coolant change) procedure for filling with engine
coolant.

Engine coolant change
1. To change engine coolant, make sure that the
engine is cool.
WARNING: When the coolant is heated to a high
temperature, be sure not to loosen or remove the
radiator cap. Otherwise you might get scalded by
hot vapor or boiling water. To open the radiato
r
cap, put a piece of thick cloth on the cap and
loosen the cap slowly to reduce the pressure when
the coolant has become cooler.
2. Open radiator cap and drain the cooling system by
loosening the drain valve on the radiator and on the
cylinder body.
NOTE: For best result it is suggested that the engine
cooling system be flushed at least once a year. It is
advisable to flash the interior of the cooling system
including the radiator before using anti-freeze
(ethylene-glycol based).
Replace damaged rubber hoses as the engine
anti-freeze coolant is liable to leak out even mino
r
cracks.
Isuzu recommends to use Isuzu genuine anti-freeze
(ethylen-glycol based) or equivalent, for the cooling
system and not add any inhibitors or additives.
CAUTION: A failure to correctly fill the engine
cooling system in changing or topping up coolant
may sometimes cause the coolant to overflow from
the filler neck even before the engine and radiato
r
are completely full.
If the engine runs under this condition, shortage o
f
coolant may possibly result in engine overheating.
To avoid such trouble, the following precautions
should be taken in filling the system.
3. To refill engine coolant, pour coolant up to filler neck
using a filling hose which is smaller in outside
diameter of the filler neck. Otherwise air between
the filler neck and the filling hose will block entry,
preventing the system from completely filling up.
4. Keep a filling rate of 9 liter/min. or less. Filling ove
r
this maximum rate may force air inside the engine
and radiator.
And also, the coolant overflow will increase, making
it difficult to determine whether or not the system is
completely full.
5.
After filling the system to the full, pull out the filling
hose and check to see if air trapped in the system is
disclodged and the coolant level goes down. Should
the coolant level go down, repeat topping-up until
there is no more drop in the coolant level.

6B-14 ENGINE COOLING (6VE1 3.5L)
6. After directly filling the radiator, fill the reservoir to
the maximum level.
7. Install and tighten radiator cap and start the engine.
After idling for 2 to 3 minutes, stop the engine and
reopen radiator cap. If the water level is lower,
replenish.
WARNING: When the coolant is heated to a high
temperature, be sure not to loosen or remove the
radiator cap. Otherwise you might get scalded by
hot vapor or boiling water. To open the radiato
r
cap, put a piece of thick cloth on the cap and
loosen the cap slowly to reduce the pressure when
the coolant has become cooler.
8.
After tightening radiator cap, warm up the engine at
about 2,000 rpm.
Set heater adjustment to the highest temperature
position, and let the coolant circulate also into
heater water system.
9. Check to see the thermostat has opened through
the needle position of water thermometer, conduct a
5-minute idling again and stop the engine.
10. When the engine has been cooled, check filler neck
for water level and replenish if required. Should
extreme shortage of coolant is found, check the
coolant system and reservoir tank hose for leakage.
11. Fill the coolant into the reservoir tank up to “MAX"
line.

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-1
ENGINE
3.5L ENGINE DRIVEABILITY AND EMISSIONS
CONTENTS


ABBREVIATION CHARTS ................................ 6E-5
COMPONENT LOCATOR ................................. 6E-6
ENGINE COMPONENT LOCATOR TABLE .. 6E-6
ECM CIRCUIT DIAGRAM ................................. 6E-10
GROUND POINT CHART G.EXP (LHD)
WITHOUT EUROPE, ISRAEL, TURKEY (1/4). 6E-13
GROUND POINT CHART G.EXP (LHD) (2/4) .. 6E-14
GROUND POINT CHART G.EXP (LHD) (3/4) .. 6E-15
GROUND POINT CHART G.EXP (LHD) (4/4) .. 6E-16
GROUND POINT CHART G.EXP (RHD) (1/4) . 6E-17
GROUND POINT CHART G.EXP (RHD) (2/4) . 6E-18
GROUND POINT CHART G.EXP (RHD) (3/4) . 6E-19
GROUND POINT CHART G.EXP (RHD) (4/4) . 6E-20
LOCATION ........................................................ 6E-21
CABLE HARNESS & CONNECTOR
LOCATION ....................................................... 6E-22
CONNECTOR LIST ........................................... 6E-27
RELAY AND FUSE ............................................ 6E-30
RELAY AND FUSE BOX LOCATION
(LHD&RHD) ................................................... 6E-30
RELAY AND FUSE BOX LOCATION
(LHD&RHD) ................................................... 6E-31
FUSE AND RELAY LOCATION
(LHD&RHD) ................................................... 6E-32
ECM WIRING DIAGRAM (1/10) ........................ 6E-33
ECM WIRING DIAGRAM (2/10) ........................ 6E-34
ECM WIRING DIAGRAM (3/10) ........................ 6E-35
ECM WIRING DIAGRAM (4/10) ........................ 6E-36
ECM WIRING DIAGRAM (5/10) ........................ 6E-37
ECM WIRING DIAGRAM (6/10) ........................ 6E-38
ECM WIRING DIAGRAM (7/10) ........................ 6E-39
ECM WIRING DIAGRAM (8/10) ........................ 6E-40
ECM WIRING DIAGRAM (9/10) ........................ 6E-41
ECM WIRING DIAGRAM (10/10) ...................... 6E-42
ECM CONNECTOR PIN ASSIGNMENT
& OUTPUT SIGNAL ......................................... 6E-43
GENERAL DESCRIPTION FOR ECM AND
SENSORS ........................................................ 6E-51

Mass Air Flow (MAF) Sensor & Intake Air
Temperature (IAT) Sensor ............................. 6E-52
Throttle Position Sensor (TPS)....................... 6E-52
Idle Air Control (IAC) Valve ............................ 6E-53
Camshaft Position (CMP) Sensor .................. 6E-53
Crankshaft Position (CKP) Sensor ................. 6E-54
Engine Coolant Temperature (ECT) Sensor .. 6E-54
Vehicle Speed Sensor (VSS) ......................... 6E-55
Heated Oxygen (O
2) Sensor........................... 6E-55
GENERAL DESCRIPTION FOR FUEL
METERING....................................................... 6E-56
GENERAL DESCRIPTION FOR ELECTRONIC
IGNITION SYSTEM IGNITION
COILS & CONTROL ......................................... 6E-58
GENERAL DESCRIPTION FOR EVAPORATIVE
EMISSION SYSTEM ........................................ 6E-61
GENERAL DESCRIPRION FOR EXHAUST
GAS RECIRCULATION (EGR) SYSTEM......... 6E-62
ISUZU STRATEGY BASED DIAGNOSTICS .... 6E-63
Diagnostic Thought Process .......................... 6E-64
1. Verify the Complaint ................................... 6E-64
2. Perform Preliminary Checks....................... 6E-64
3. Check Bulletins and Troubleshooting
Hints ........................................................... 6E-65
4. Perform Service Manual Diagnostic
Checks ....................................................... 6E-65
5a and 5b. Perform Service Manual
Diagnostic Procedures ............................... 6E-65
5c. Technician Self Diagnoses ....................... 6E-65
5d. Intermittent Diagnosis............................ 6E-66
Symptom Simulation Tests.......................... 6E-67
5e. Vehicle Operates as Designed ................. 6E-68
6. Re-Examine the Complaint ........................ 6E-68
7. Repair and Verify Fix .................................. 6E-68
GENERAL SERVICE INFORMATION .............. 6E-69
Aftermarket Electrical and Vacuum
Equipment ..................................................... 6E-69
Electrostatic Discharge Damage .................... 6E-69

6E-2 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Visual/Physical Engine Compartment
Inspection ...................................................... 6E-74
Basic Knowledge of Tools Required............... 6E-71
Serial Data Communications .......................... 6E-71
On-Board Diagnostic (OBD) ........................... 6E-71
Comprehensive Component Monitor
Diagnostic Operation ..................................... 6E-71
The Diagnostic Executive ............................... 6E-72
Verifying Vehicle Repair ................................. 6E-73
Reading Flash Diagnostic Trouble Codes ...... 6E-73
Reading Diagnostic Trouble Codes Using
a Tech 2......................................................... 6E-73
On-Board Diagnosis (Self-Diagnosis)............. 6E-74
Diagnosis with Tech 2 .................................... 6E-75
TYPICAL SCAN DATA & DEFINITIONS
(ENGINE DATA) ............................................... 6E-79
TYPICAL SCAN DATA & DEFINITIONS
(O2 SENSOR DATA)........................................ 6E-81
MISCELLANEOUS TEST .................................. 6E-83
PLOTTING SNAPSHOT GRAPH ...................... 6E-85
Plotting Graph Flow Chart (Plotting graph
after obtaining vehicle information)................ 6E-86
Flow Chart for Snapshot Replay
(Plotting Graph) ............................................. 6E-87
SNAPSHOT DISPLAY WITH TIS2000.............. 6E-88
SERVICE PROGRAMMING SYSTEM (SPS).... 6E-91
HOW TO USE BREAKER BOX ........................ 6E-94
ON-BOARD DIAGNOSTIC (OBD) SYSTEM
CHECK ............................................................. 6E-97
NO CHECK ENGINE LAMP (MIL)..................... 6E-101
CHECK ENGINE LAMP (MIL) "ON" STEADY ... 6E-104
FUEL INJECTOR COIL TEST PROCEDURE
AND FUEL INJECTOR BALANCE
TEST PROCEDURE ......................................... 6E-106
FUEL SYSTEM ELECTRICAL TEST ................ 6E-111
FUEL SYSTEM DIAGNOSIS ............................. 6E-116
A/C SYSTEM CIRCUIT DIAGNOSIS ................ 6E-122
ECM DIAGNOSTIC TROUBLE CODES (DTC) 6E-130
MULTIPLE DTC SETS TROUBLESHOOTING
AIDS ................................................................. 6E-142
DTC P0101 (FLASH CODE 61) MASS
AIR FLOW SENSOR CIRCUIT
RANGE/PERFORMANCE ................................ 6E-146
DTC P0102 (FLASH CODE 61) MASS
AIR FLOW SENSOR CIRCUIT LOW INPUT ... 6E-149
DTC P0103 (FLASH CODE 61) MASS
AIR FLOW SENSOR CIRCUIT HIGH INPUT .. 6E-154
DTC P0112 (FLASH CODE 23) INTAKE AIR
TEMPERATURE (IAT) SENSOR LOW
INPUT ............................................................... 6E-158 DTC P0113 (FLASH CODE 23) INTAKE AIR
TEMPERATURE (IAT) SENSOR HIGH
INPUT ............................................................... 6E-163
DTC P0117 (FLASH CODE 14) ENGINE
COOLANT TEMPERATURER (ECT)
SENSOR LOW INPUT ..................................... 6E-168
DTC P0118 (FLASH CODE 14) ENGINE
COOLANT TEMPERATURER (ECT)
SENSOR HIGH INPUT..................................... 6E-173
DTC P0121 (FLASH CODE 21) THROTTLE
POSITION SENSOR (TPS) CIRCUIT
RANGE/PERFORMANCE ................................ 6E-179
DTC P0122 (FLASH CODE 21) THROTTLE
POSITION SENSOR (TPS) CIRCUIT
LOW INPUT ..................................................... 6E-183
DTC P0123 (FLASH CODE 21) THROTTLE
POSITION SENSOR (TPS) CIRCUIT
HIGH INPUT ..................................................... 6E-188
DTC P0131 (FLASH CODE 15) O2 SENSOR
CIRCUIT LOW VOLTAGE
(BANK 1 SENSOR 1) ....................................... 6E-193
DTC P0151 (FLASH CODE 15) O2 SENSOR
CIRCUIT LOW VOLTAGE
(BANK 2 SENSOR 1) ....................................... 6E-193
DTC P0132 (FLASH CODE 15) O2 SENSOR
CIRCUIT HIGH VOLTAGE
(BANK 1 SENSOR 1) ....................................... 6E-201
DTC P0152 (FLASH CODE 15) O2
SENSOR CIRCUIT HIGH VOLTAGE
(BANK 2 SENSOR 1) ....................................... 6E-201
DTC P0134 (FLASH CODE 15) O2 SENSOR
CIRCUIT NO ACTIVITY DETECTED
(BANK 1 SENSOR 1) ....................................... 6E-207
DTC P0154 (FLASH CODE 15) O2 SENSOR
CIRCUIT NO ACTIVITY
DETECTED (BANK 2 SENSOR 1) ................... 6E-207
DTC P0171 (FLASH CODE 44) O2 SENSOR
SYSTEM TOO LEAN (BANK 1) ....................... 6E-211
DTC P0174 (FLASH CODE 44) O2 SENSOR
SYSTEM TOO LEAN (BANK 2) ....................... 6E-211
DTC P0172 (FLASH CODE 45) O2 SENSOR
SYSTEM TOO RICH (BANK 1) ........................ 6E-216
DTC P0175 (FLASH CODE 45) O2 SENSOR
SYSTEM TOO RICH (BANK 2) ........................ 6E-216
DTC P1171 (FLASH CODE 44) FUEL
SUPPLY SYSTEM LEAN DURING POWER
ENRICHMENT (TYPE A) ................................. 6E-221
DTC P1172 (FLASH CODE 44) FUEL SUPPLY
SYSTEM LEAN DURING POWER
ENRICHMENT (TYPE B) ................................. 6E-221

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-7











Legend
(1) Injector #1 Cylinder
(2) Injector #3 Cylinder
(3) Injector #5 Cylinder
(4) EGR Valve
(5) Ignition Coil #1 Cylinder
(6) Ignition Coil #3 Cylinder
(7) Ignition Coil #5 Cylinder
(8) Engine Coolant Temperature (ECT) Sensor












Legend
(1) Injector #2 Cylinder
(2) Injector #4 Cylinder
(3) Injector #6 Cylinder
(4) Idle Air Control (IAC) Valve
(5) Throttle Position Sensor
(6) Ignition Coil #2 Cylinder
(7) Ignition Coil #4 Cylinder
(8) Ignition Coil #6 Cylinder
(9) Canister Purge Solenoid Valve

6E-28 3.5L ENGINE DRIVEABILITY AND EMISSIONS

No. Connector face No. Connector face
E-54

Ignition coil E-64

Oil pressure switch (P/STRG)
E-55

Ignition coil E-66
Duty solenoid
E-56

Ignition coil E-68

Throttle position sensor
E-57

Ignition coil E-69


Temperature sensor
E-58

Ignition coil E-70
IACV
E-59


Crank position sensor E-72

Engine earth-A
E-60

ECM-A E-73

Engine earth-A
E-61


ECM-B E-74
Engine earth-B
E-62

Cam position sensor E-76

EGR valve
E-63

MAF sensor E-77

O2 sensor RH-Front

6E-44 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
Idle Engine
2000rpmECM
Connection Range(+) (-)
A14 A14 No Connection - - - - - - - - -
A15 A15 No Connection - - - - - - - - -
A16 A16 No Connection - - - - - - - - -
A17 A17 No Connection - - - - - - - - -
A18 A18 No Connection - - - - - - - - -
A19 A19 Intake Air
Temperature
(IAT) Sensor
Signal YEL/
GRN Less than 1V0 deg. C: Approx. 3.5V / 20 deg. C: Approx.
2.5V / 40 deg. C: Approx. 1.6V / 60 deg. C:
0.9V / 80 deg. C: 0.6V Connect DC V A19 B39
A20 A20 No Connection - - - - - - - - -
A21 A21 Engine Coolant
Temperature
(ECT) Sensor
Signal BLU/
RED Less than 1V0 deg. C: Approx. 3.6V / 20 deg. C: Approx.
2.4V / 40 deg. C: Approx. 1.4V / 60 deg. C:
3.4V / 80 deg. C: 2.6V Connect DC V A21 A22
A22 A22 EGR Valve &
ECT Sensor
Ground YEL/
BLK Continuity
with ground - - - Connect Ohm A22 GND
A23 A23 Crank Position
(CKP) Sensor
Signal YEL - - Wave form or approx. 1.9V Connect AC V A23 A25
A24 A24 Crank Position
(CKP) Sensor &
EGR Valve +5V
Supply RED/
BLU Less than 1V Approx. 5V Connect DC V A24 A25
A25 A25 Crank Position
(CKP) Sensor
Ground YEL/
BLK Continuity
with ground - - - Connect Ohm A25 GND
A26 A26 No Connection - - - - - - - - -
A27 A27 No Connection - - - - - - - - -
A28 A28 ECM Main
Relay BLU/
RED While main
relay is
activated:
Less than 1V
Main relay is
not activated:
10-14V Less than 1V Connect DC V A28 GND
A29 A29 No Connection - - - - - - - - -
A30 A30 No. 5 Ignition
Coil RED/
YEL - - Wave form - - - -