Page 1997 of 4264
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
Page 2002 of 4264
6E-6 3.5L ENGINE DRIVEABILITY AND EMISSIONS
COMPONENT LOCATOR
ENGINE COMPONENT LOCATOR TABLE
Legend
(1) Engine Control Module (ECM)
(2) Throttle Position Sensor (TPS)
(3) Idle Air Control (IAC) Valve
(4) Battery
(5) Relay & Fuse Box
(6) Auto Cruise Actuator
(7) Mass Air Flow (MAF) & Intake Air Temperature
(IAT) Sensor Assembly
Page 2025 of 4264
3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-29
No. Connector face No. Connector face
E-78
O2 sensor LH-Front P-1
SilverBattery (+)
E-79
Neutral start switch P-2
SilverRelay & Fuse box
F-2
White
Fuel pump & sensor P-5
SilverBattery (-)
H-4
White Engine ~ Engine room P-8
WhiteACG (L)
H-6
White
Engine room ~ INST P-10
SilverEngine ground
H-7
White
Engine room ~ INST X-2
BlackRelay ; Fuel pump
H-9
Blue
Engine room ~ Chassis X-13
BlackRelay ; ECM MAIN
H-18
White
Engine room ~ INST X-14
BlackRelay ; A/C Compressor
H-22
White
Engine ~ Engine room C X-15
BlackRelay ; Thermo
H-23
White Engine ~ Engine room B X-17
BlackDIODE
Page 2026 of 4264
6E-30 3.5L ENGINE DRIVEABILITY AND EMISSIONS
RELAY AND FUSE
RELAY AND FUSE BOX LOCATION (LHD & RHD)
LHD
RHD
RTW48ALF000201 & 825R300008
Page 2027 of 4264
3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-31
RELAY AND FUSE BOX LOCATION (LHD & RHD)
RELAY & FUSE BOX
RELAY
NO. Relay name
X-1 RELAY; TAIL LIGHT
X-2 RELAY; FUEL PUMP
X-3 RELAY; HORN
X-4 RELAY; DIMMER
X-5 RELAY; FOG LIGHT
X-6 RELAY; STARTER
X-7 RELAY; COND, FAN
X-8 RELAY;
X-9 RELAY; HAZARD-RH
X-10 RELAY; HAZARD-LH
X-11 RELAY; HEATER
X-12 RELAY; HEAD LIGHT
X-13 RELAY; ECM MAIN
X-14 RELAY; A/C COMP
X-15 RELAY; THERMO
FUSE
!
"
#
$
%%
&
'(
)
! )* (
SLOW BLOW FUSE
+,-+,-
(.
!
"
# '
$
Page 2028 of 4264
6E-32 3.5L ENGINE DRIVEABILITY AND EMISSIONS
FUSE & RELAY LOCATION (LHD & RHD)
RTW46EMF001001
FUSE
/
0123 410
21, , +
5 +
/
0123 410
21, , +
5 +
( 6
( 7
7% 6
!
! " )
" # %
# $ 7
$ ' %
(
SLOW BLOW FUSE
/
0123 410
21, , +
5 +
(
%' ' ('
RELAY
Connector No. B-7 B-8 B-40
6VE1 REAR DEFOGGER POWER WINDOW ACC SOCKET
FUSE BOX
Page 2039 of 4264
3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-43
ECM CONNECTOR PIN ASSIGNMENT & OUTPUT SIGNAL
Connector A Port: View Looking Into ECM Case
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(+) (-)
A1 A1 No Connection - - - - - - - - -
A2 A2 No Connection - - - - - - - - -
A3 A3 No Connection - - - - - - - - -
A4 A4 Ground (Case) BLK/
RED Continuity
with ground - - - Disconnect Ohm A4 GND
A5 A5 EGR Valve
Control Duty
Signal YEL Less than 1V 10-14V Wave form Connect DC V A5 GND
A6 A6 ECM Main
Relay BLU/
YEL While main
relay is
activated:
10-14V
Main relay is
not activated:
Less than 1V 10-14V Connect DC V A6 GND
A7 A7 Ground BLK/
YEL Continuity
with ground - - - Disconnect Ohm A7 GND
A8 A8 Ground BLK/
YEL Continuity
with ground - - - Disconnect Ohm A8 GND
A9 A9 EGR Valve
Position Signal YEL/
RED Less than 1V 0.5-0.8V Connect DC V A9 GND
A10 A10 CAN (Controller
Area Network)
to TCM A17 RED - - - - - - - -
A11 A11 CAN (Controller
Area Network)
to TCM A7 WHT - - - - - - - -
A12 A12 No Connection - - - - - - - - -
A13 A13 No Connection - - - - - - - - -
Page 2040 of 4264
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 - - - -
