start ISUZU KB P190 2007 Workshop Repair Manual

6E-6 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
P0501 25 AAA Vehicle Speed Sensor Circuit Range/ Performance
P0512 417 C -- Starter Request Circuit
P0562 35 C AA System Voltage Low
P0563 35 C AA System Voltage High
P0565 515 D D- Cruise Control On Signal
P0566 516 D D- Cruise Control Off Signal
P0567 517 D D- Cruise Control Resume Signal
P0568 518 D D- Cruise Control Set Signal
P0571 26 D D- Brake Switch Circuit
P0601 53 C AA Internal Control Module Memory Check Sum Error
P0602 154 C AA Control Module Programming Error
P0604 153 C AA Internal Control Module RAM Error
P0606 51 C AA ECM Processor
P0615 19 C -- Starter Relay Circuit
P0633 176 C AA Immobilizer Not Programmed
P0638 61 A AA Throttle Actuator Control Range/ Performance
P0642 55 C AA Sensor Reference Voltage 1 Circuit Low
P0643 55 C AA Sensor Reference Voltage 1 Circuit High
P0650 77 A AA Malfunction Indicator Lamp (MIL) Control Circuit
P0652 56 A AA Sensor Reference Voltage 2 Circuit Low
P0653 56 A AA Sensor Reference Voltage 2 Circuit High
P0661 58 C AA Intake Manifold Turning Valve Control Circuit Low
P0662 58 C AA Intake Manifold Turning Valve Control Circuit High
P0698 57 A AA Sensor Reference Voltage 3 Circuit Low
P0699 57 A AA Sensor Reference Voltage 3 Circuit High
P0700 185 A A- Transmission Control System (MIL Request)
P1064 247 A AA Fuel Pressure Regulator Control Circuit
P1065 247 A AA Fuel Pressure Regulator Control Circuit
P1093 227 A AA Fuel Rail Pressure Too Low
P1094 226 A AAFuel Rail Pressure Too Low (FRP Regulator
Commanded High)
P1094 226 C AA Fuel Rail Pressure Too Low (Fuel Pressure Drop)
P1196 461 A AA Intake Throttle Solenoid Control Driver
P1197 461 A AA Intake Throttle Solenoid Control Driver
P1198 461 A AA Intake Throttle Solenoid Control Driver
P124B 157 C AA Injector Circuit Short Across Group 1 & 2
P1261 34 A AA Injector Positive Voltage Control Circuit Group 1
P1261 34 A AAInjector Positive Voltage Control Circuit (Supply Voltage
Low)
DTC
Flash
Code DTC Type
DTC Descriptor
Euro 4
Specification Except Euro 4
Specification
(High Output) Except Euro 4
Specification (Standard Output)

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6E-10 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Engine Controls Schematics
Power Distribution (1)
RTW76EXF003601
X-11
X-11 Heater
relay
1
2
Blower
motor Ignition
switchIgnition
switch Starter
relay
SBF1
Main
120A SBF2
ABS-1
40A SBF3
ABS-2
20A SBF5
IG1
40A SBF4
ECM
40A
SBF6
Blower
30A
EB-13
A/C
10A
2
BLU/
RED
3
BLU/
RED 3
BLU/
RED SBF8
Glow
60A
SBF7
Front
Fog
20A
SBF9
IG2
60A
EB-9
Fog
15A
or
Trailer
20AEB-10
Tail/Illumi
10A
or
Condenser
fan
20A EB-4
Engine
10A
EB-14
4WD
10A EB-15
Horn
10A EB-16
Hazard10A EB-1
ACG
(S)
10AEB-2
ECM
(B)
10AEB-3
F/Pump10A
EB-5 H/L HI(RH)10A Fuse
EB-6 H/L HI(LH)10A Fuse
EB-7 H/L LO(RH)10A Fuse
EB-8 H/L LO(LH)10A Fuse
P-6
Body
Generator P-5
8 BLK/
P-1
P-2
Battery
8
BLK 5WHTSrarter
Srarter
C-3
ELEC IG
10A
Fuse
E-92
0.5 WHT
0.3
BLK 3
WHT/
RED 5
WHT
0.3
BLK 5
RED/
BLU
5
RED
3
WHT/
BLK
30
BLK/
RED
30
BLK/
YEL
P-10
Engine
5
4 X-12
X-12
ECM
Fuel pump relay
ECM
ECM
main
relay
1
2 5
4
X-6
X-6
2
RED/
WHT
0.3
RED/
BLU Fuse/ relay box(Engine room)
2
RED
2
RED
0.5
RED
2
WHT
2
RED/
BLU 2
WHT
2
3 1
5
Lighting
switch Head
lamp
relay
C-36 C-36
RED
P-16
P-15
2nd
Battery
30
BLK/
YEL 30
BLK/
RED
P-10

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-11
Power Distribution (2)
RTW76EXF003701
C-108
5
WHT
3
WHT/
BLK
5
WHT
3
WHT/
BLK
3BLU
3BLK/RED
3
WHT/
BLK
3
BLK/
YEL 3
BLK/
WHT B-62
B-63
2
4
B-62
B-63 1
1
3
C-18
Rr
Def.
20A C-21
Door
lock
20A C-19
Meter
(+B)
10A C-15
Stop
lamp
15A C-22
Anti
theft
10A C-13
Audio
(+B)
15A
C-16
RR
Fog
10A C-17
Room
10A C-20
Power
window
30A Fuse/
relay box
(Cabin)
C-14
Meter
10A C-8
SRS
10AC-7
TCM
10A
or
15A C-9
Front
wiper
20A C-10
Back
up
15A C-6
Engine
10A
C-5
ABS/4WD
10AC-1
Starter
10AC-2
Trailer
10AC-3
ELEC IG
10A C-4
Turn
10AC-12
Cigar
lighter
&
ACC
Socket
20A C-11
Audio
10A
SBF9
IG2
60A Fuse/
relay
box
(Engine
room)
Starter relay
SBF5
IG1
40A
1
2
3 B-62 B1
B2
OFF
ACC
IG2ST
IG1 Ignition
switch

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6E-12 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Starting and Charging System
RTW76EXF003801
EB-1
ACG(S)
10A
0.5
WHT
2
WHT
SBF1
Main
120A SBF5
IG1
40A Refer to
power
distribution Fuse/ relay
box(Engine room)
SBF9
IG2
60A
5
WHT 5
WHT
P-8 P-5
8 BLK/
RED
P-1
P-2
Battery
8
BLK
30
BLK/
YEL
P-10
P-16
P-15
2nd
Battery
30
BLK/
RED
30
BLK/
RED
30
BLK/
YEL
P-10 X-8
X-8
E-4
Generator H-1Starter
relay
1
1
H-4 E-92
8
2
4
E-4 E-17
2 B-23
3 B-24
8
3 X-7
X-7 Starter
cut
relay
1 3
45
Starter
P-4
1
B
S
SB
L
P-3 0.3
WHT/
BLU
5
WHT
5
WHT
0.5
WHT
Charge
lightIP
cluster
H-6
1
0.5
WHT/
BLU
0.5
WHT/
BLU H-49
1 C-108
3
WHT/
BLK
3
WHT/
BLK
3
BLK/
YEL
0.5
YEL 3
BLK/
WHT B-62
B-63
2
3
C-14
Meter
10A C-1
Starter
10A C-6
Engine
10A
0.5
WHT/
GRN
0.5
WHT/
GRN
0.5
RED/
WHT
0.5RED/WHT
0.5WHT/GRN
0.5
RED/
WHT
Starter switchsignal Ignition
switchsignal Glow relay
DRM
ECM Refer to
power
distribution
Fuse/relay
box(Cabin)
1
2
3 B-62 1 B-63
5 5 9 C-107
B-56
44
35 72
B1
B2
OFF
ACC
IG2
ST
IG1 Ignition
switch
Relay
control
4
0.3
BLK/
WHT
3
BLK/
YEL
0.3
BLK/
YEL
3
WHT
0.5YEL
Fuse/relay box(Engine room)3WHT/BLK
0.5
BLU/
YEL
H-4
A/T
M/T
C-36
E-10 0.5
BLK/
WHT
Inhibitor
switch 0.3
BLK 0.5
ORN/
BLU
0.5
BLK E-51
7
(4)
E-51
10
(1) C-58
( )...High output

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ISUZU KB P190 2007

6E-24 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
A/C Control System and Glow Control System
RTW76EXF001701
9 C-107C-58
X-14
X-14 A/C
compressor
relay
13
5 2 X-5
X-5
H-4 Glow
relay
42
1
3
ECM
Ignition
signal
Thermo
relay
signal X-15
X-15 Thermo
relay
Refrigerant
pressure
switch 0.5
GRN/
YEL 0.5
GRN/
BLK 0.5
GRN/
ORN
0.5
GRN/
BLK 0.5
GRN/
ORN
3
BLK/
RED
Glow
plug
Compressor
clutch
Relay
control Relay
control
H-4
E-3
( )=A/T 0.5
BRN
0.5
GRN/
RED 0.5
BLK/
BLU
0.5
WHT/
GRN 3
RED/
WHT
3
BLK/
RED
0.5
GRN/
BLK
0.5
BRN
0.5
BRNEB-13
A/C
10A Fuse/
relay
box
(Engine room)
0.5
BRN
23 1
5
1 SBF8
Glow
60A Fuse/
relay
box
(Cabin)
C-6
Engine
10A
0.5
WHT/
GRN
0.5
WHT/
GRN
Starter
cut
relay Refer to
Power distribution
15 19
(28)
E-49
72
37
55
4

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6E-32 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Engine Control Module (ECM)-J2
Pin No. Wire ColorPin Function
58 YEL CKP sensor signal
59 PNK Fuel filter switch signal
60 — Not used
61 BLU/ GRN IAT sensor low reference
62 BRN EGR drive voltage
63 YEL EGR control low side
64 BLK CMP sensor shield ground
65 — Not used
66 ORN/ BLK Turbocharger nozzle control
solenoid valve control
67 YEL Swirl control solenoid valve
control
68 WHT FRP sensor signal
69 BLK FRP sensor low reference
70 BLU/ RED FRP regulator low side
71 RED Cylinder #2 fuel injector charge
voltage
72 PNK Cylinder #4 fuel injector charge
voltage
73 BLK Ground
Connector No. C-58
Connector Color Black
Test Adapter No. J-35616-64A
Pin No. Wire Color Pin Function
1 ORN Brake switch 2 signal
2 BLK/ GRN Diagnostic request switch
RTW76ESH003101
12345678910111213141516
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
Pin No. Wire Color
Pin Function
3 RED/ GRN P or N range switch (A/T)
BLK/ WHT Neutral switch (M/T)
4 GRN/ BLK Thermo relay signal
5 — Not used
6 — Not used
7 BLU APP sensor 3 5V reference
8 BL/ UWHT APP sensor 3 signal
9 ORN APP sensor 2 5V reference
10 BLU/ GRN APP sensor 2 signal 11 WHT APP sensor 1 5V reference
12 RED APP sensor 1 signal
13 GRY/ GRN Cruise cancel switch signal
14 WHT/ GRN Cruise main switch signal
15 — Not used
16 — Not used
17 — Not used
18 — Not used
19 YEL Clutch switch signal
20 — Not used
21 RED Brake switch 1 signal
22 — Not used
23 BLU/ RED APP sensor 3 low reference
24 BLK APP sensor 3 shield ground
25 ORN/ BLU APP sensor 2 low reference
26 BLK APP sensor 2 shield ground
27 BLK APP sensor 1 low reference
28 BLK APP sensor 1 shield ground
29 BRN/ YEL Cruise resume switch signal
30 LT GRN Cruise set switch signal
31 — Not used
32 — Not used
33 BLK/ RED Engine speed signal output
34 — Not used
35 ORN/ BLU Starter cut relay control
36 — Not used
37 BLK/ BLU Glow relay control
38 — Not used
39 — Not used
40 — Not used
41 — Not used
42 — Not used

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-33
Pin No. Wire ColorPin Function
43 — Not used
44 RED/ WHT Starter switch signal
45 BLU/ RED ECM main relay control
46 — Not used
47 — Not used
48 — Not used
49 GRN/ YEL Cruise set lamp control
50 GRN/ WHT Cruise main lamp control
51 — Not used
52 RED/ WHT Battery voltage (Back-up)
53 — Not used
54 ORN/ BLK Fuel pump relay control
55 GRY/ RED A/C compressor relay control
56 RED/ WHT Accelerator pedal position signal
output
57 BRN/ YEL MIL control
58 — Not used
59 — Not used
60 — Not used
61 — Not used
62 BLK/ YEL VSS signal
63 BLK Ground
64 — Not used
65 BLU/ RED ECM main relay control
66 YEL CAN High
67 BLU CAN Low
68 — Not used
69 BRN/ RED Fuel filter lamp control
70 ORN/ WHT Fuel consumption signal output
71 PNK/ WHT SVS lamp control (Euro 4
specification)
72 WHT/ GRN Ignition voltage
73 RED/ BLU Battery voltage

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6E-44 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
Diagnostic Starting Point - Engine Controls
Begin the system diagnosis with Diagnostic System
Check - Engine Controls. The Diagnostic System
Check - Engine Controls will provide the following
information:
• The identification of the control modules which command the system.
• The ability of the control modules to communicate through the serial data circuit.
• The identification of any stored diagnostic trouble codes (DTCs) and the their statuses.
The use of the Diagnostic System Check - Engine
Controls will identify the correct procedure for
diagnosing the system and where the procedure is
located.
Important: Engine Control System Check Sheet must
be used to verify the complaint vehicle, you need to
know the correct (normal) operating behavior of the
system and verify that the customer complaint is a valid
failure of the system. Reading Flash Diagnostic Trouble Codes (DTC)
The provision for communicating with the ECM is the
Data Link Connector (DLC). The DTC(s) stored in the
ECM memory can be read either through a hand-held
diagnostic scanner such as Tech 2 plugged into the
DLC or by counting the number of flashes of the
malfunction indicator lamp (MIL) or the service vehicle
soon (SVS) lamp when the diagnostic test terminal of
the DLC is grounded. The DLC terminal "1" (diagnostic
request) is pulled "Low" (grounded) by jumped to DLC
terminal "4", which is a ground wire. Once terminals "1"
and "4" have been connected, turn the ignition switch
ON, with the engine OFF. The MIL (except Euro 4
specification) or the SVS lamp (Euro 4 specification)
will indicate a DTC three times is a DTC is present and
history. If more than one DTC has been stored in the
ECM's memory, the DTCs will be output set order with
each DTC being displayed three times. The flash DTC
display will continue as long as the DLC is shorted.
RTW76ESF000301
ON
OFF
ON
OFF
1.2
3.2
2.62.6
2nd digit number1st digit number
3.20.6 2
1.2
0.60.60.6
0.30.30.3
0.30.30.30.30.3
Example:DTC 23 stored
Unit: Second
Example:DTC 225 stored
3rd digit
number 2nd digit number1st digit number
0.60.60.60.60.60.60.60.6
3
0.30.31.21.2
2
25

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ENGINE CONTROL SYSTEM (4JK1/4JJ1) 6E-45
Diagnostic System Check - Engine Controls
Description
The Diagnostic System Check - Engine Controls is an
organized approach to identifying a condition that is
created by a malfunction in the electronic engine
control system. The Diagnostic System Check must be
the starting point for any driveability concern. The
Diagnostic System Check directs the service technician
to the next logical step in order to diagnose the
concern. Understanding and correctly using the
diagnostic table reduces diagnostic time, and prevents
the replacement of good parts.
Test Description
The numbers below refer to the step numbers on the
diagnostic table.
2. Lack of communication may be because of a partial
or a total malfunction of the serial data circuit.
7. The presence of DTCs which begin with U, indicate
that some other module is not communicating.
10. If there are other modules with DTCs set, refer to
the DTC list. The DTC list directs you to the appropriate
diagnostic procedure. If the control module stores
multiple DTCs, diagnose the DTCs in the following
order:
• Component level DTCs, such as sensor DTCs, solenoid DTCs, actuator DTCs, and relay DTCs.
Diagnose the multiple DTCs within this category in
numerical order. Begin with the lowest numbered
DTC, unless the diagnostic table directs you
otherwise. Diagnostic System Check Engine Controls
Important:
• DO NOT perform this diagnostic if there is not a driveability concern, unless another procedure
directs you to this diagnostic.
• Before you proceed with diagnosis, search for applicable service bulletins.
• Unless a diagnostic procedure instructs you, DO NOT clear the DTCs.
• If there is a condition with the starting system, refer to the starting system section in the engine
mechanical.
• Ensure the battery has a full charge.
• Ensure the battery cables (+) (-) are clean and tight.
• Ensure the ECM grounds are clean, tight, and in the correct location.
• Ensure the ECM harness connectors are clean and correctly connected. DO NOT attempt to
crank the engine with ECM harness connectors
disconnect.
• Ensure the ECM terminals are clean and correctly mating.
• Ensure the fuel injector ID code data is correctly programmed in to the ECM.
• Ensure the immobilizer security information is correctly programmed into the ECM and
immobilizer control unit (ICU).
• If there are fuel system DTC’s (P0087, P0088, P0089, P0093, P1093 or P1094), diagnose sensor
DTCs, solenoid DTCs, actuator DTCs and relay
DTCs first.
Diagnostic System Check - Engine Controls
Step Action Value(s)Yes No
1 Install a scan tool.
Does the scan tool turn ON? —
Go to Step 2 Go to Scan Tool
Does Not Power Up
2 1. Turn ON the ignition, with the engine OFF.
2. Attempt to establish communication with the listed control modules.
•ECM
• Immobilizer control unit (ICU) (If so equipped)
• Transmission control module (TCM) (AISIN A/T only)
Does the scan tool communicate with all the listed
control modules? —
Go to Step 3 Go to Scan Tool
Does Not
Communicate with CAN Device

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6E-46 ENGINE CONTROL SYSTEM (4JK1/4JJ1)
3Notice:
If an immobilizer system is active the ECM
will disable the fuel injection causing the engine to
stall immediately after starting and energize the
starter cut relay to disable cranking.
Attempt to crank the engine.
Does the engine crank? —
Go to Step 4 Go to Step 5
4 Attempt to start the engine.
Does the engine start and idle? —
Go to Step 6 Go to Engine
Cranks but Does
Not Run
5 Does the scan tool display ECM DTCs P0615,
P0633, P161B or U0167?
—
Go to Applicable DTC Problem is relating
to starting system. Refer to the
applicable
diagnostic chart in starting system
6 Select the DTC display function for the following
control modules: •ECM
• ICU (If so equipped)
• TCM (AISIN A/T only)
Does the scan tool display any DTCs? —
Go to Step 7 Go to Step 11
7 Does the scan tool display DTCs which begin with
U or other control module communication fault
DTCs? —
Go to Applicable
DTC Go to Step 8
8 Does the scan tool display ECM DTCs P0601,
P0602, P0604, P0606 or P1621? —Go to Applicable
DTC Go to Step 9
9 Does the scan tool display ECM DTCs P0562 or
P0563, P156A or P156B? —
Go to Applicable
DTC Go to Step 10
10 Is there any other code in any controller that has
not been diagnosed? —Go to Applicable
DTC Go to Step 11
11 Is the customer’s concern with the automatic
transmission? —Go to Diagnostic
System Check - Transmission
Controls Go to Step 12
12 Is the customer’s concern with the immobilizer
system? —Go to Diagnostic
System Check - Immobilizer
Controls Go to Step 13
13 1. Review the following symptoms.
2. Refer to the applicable symptom diagnostic table:
• Hard Start
• Rough, Unstable, or Incorrect Idle and Stalling
• High Idle Speed
•Cuts Out
• Surges
• Lack of Power, Sluggishness, or Sponginess
• Hesitation, Sag, Stumble
• Abnormal Combustion Noise
• Poor Fuel Economy
• Excessive Smoke (Black Smoke)
• Excessive Smoke (White Smoke)
Did you find and correct the condition? —
System OK Go to Intermittent
Conditions
Step
Action Value(s)Yes No

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