2007 ISUZU KB P190 Electrical

Starting System – V6 Page 6D1-2–11

Step Action Yes No
5
Inspect fusible link SBF1, refer to 8A Electrical Body and Chassis.
Is fusible link SBF1 blown? Replace the faulty
fusible link (refer to Note 3).
If the fusible link
blows again, repair
or replace the circuit from SBF1
connection P – 7
and engine
compartment fuse
panel connector B – 63 pin 3, (refer to
Note 2) Go to Step 6
6 Inspect fuse SBF5, refer to 8A Electrical Body and Chassis.
Is fuse SBF5 blown? Replace the faulty
fuse (refer to Note 3).
If the fuse blows again, repair or
replace the circuit from SBF5 to the cabin fuse panel
connector C – 108
pin 2 (refer to Note 2) Go to Step 7
7
Inspect fuse C20, refer to 8A Electrical Body and Chassis.
Is fuse F15 blown? Replace the faulty
fuse (refer to Note 3).
If the fuse blows again, repair or
replace the circuit
from fuse C20 to the ECM connector C –
56 pin 31 (refer to Note 2) Go to Step 8
8 NOTE
On automatic vehicles ensure that park (P) or neutral (N) is
selected.
Turn the headlamps on.
Turn the dome lamps on.
Turn the ignition switch to the START position.
Do the lamps dim? Go to Step 9 Go to Step 10
9
Perform the 3.3 On-Vehicle Testing.
Did you correct the condition?
Go to Step 21 Go to Step 2

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ISUZU KB P190 2007

Starting System – V6 Page 6D1-2–12

Step Action Yes No
10
1 Connect Tech 2 to the DLC.
2 Ignition on, engine off.
3 On Tech 2 select: Engine / V6 Engine / Data Display / Data List /
Electrical/Theft Data.
4 On Tech 2 scroll to Crank Request.
5 W hile monitoring Tech 2, turn the ignition switch to START.
Does Tech 2 display the following:
Inactive with the ignition switch in the ON position, Active with the
ignition switch in the START position? Go to Step 15 Go to Step 11
11 1 Disconnect the ECM connector C – 56.
2 Using a multimeter set to measure voltage, back probe between the harness connector C56 – X2 pin 31 and ground.
3 W ith the aid of an assistant, monitor the voltage on the multimeter and turn the ignition switch to START.
• W ith the ignition switch in the START position, the
multimeter should display battery voltage
• W ith the ignition switch in the ON position, the multimeter
should display 0 V
Does the multimeter display as described? Refer to 6C1 - 3
Engine
Management – V6 – Service Operations
for further diagnosis.
Go to Step 21 Go to Step 12
12 Test the ignition switch, refer to 3B Steering.
Is the ignition switch serviceable?
Go to Step 13 Replace the faulty
ignition switch. Refer to 3B
Steering
Go to Step 21
13 Check for short to ground or open circuit from the ignition switch start
terminal to the ECM connector C – 56 pin 31.
W as the circuit serviceable? Go to Step 14 Repair as required
(refer to Note 2).
Go to Step 21
14 Check for short to ground or open circuit from the ignition switch
terminal B1 to the fuse SBF5.
W as the circuit serviceable? Go to Step 2 Repair as required
(refer to Note 2).
Go to Step 21
15 NOTE
This procedure is only required on vehicles fitted with
manual transmissions. If the vehicle is fitted with an
automatic transmission, go to Step 16
1 Scroll to Starter Relay
2 W hile monitoring Tech 2, turn the ignition switch to START.
Does Tech 2 display the following:
Off with the ignition switch in the ON position,
On with the ignition switch in the START position?
Go to Step 21 Go to Step 16

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ISUZU KB P190 2007

Starting System – V6 Page 6D1-2–15

3 Minor Service Operations
3.1 Safety Precautions
Observe the following precautions. Failure to observe these precautions can result in serious damage to components.
• Refer to 1.1 W ARNING, CAUTION and NOTES in this Service Information before disconnecting the battery.
• Use the starter motor on a negative ground system only.
• W hen installing a battery, attach the positive (+) cable to the battery first. Then attach the negative cable.
• W hen using a slave battery for starting purposes, ensure that both batteries are connected in parallel, that is.
positive to positive terminals and negative to negative terminals.
• Only use jumper leads that have surge protection.
3.2 Maintenance
Regular Checks
Check the following at regular intervals:
• Starter motor terminals – for corrosion and loose connectors.
• W iring – for damaged insulation.
• Mounting bolts – for tightness.
• Battery terminals – for clean and secure connections.
3.3 On-Vehicle Testing
NOTE
The battery must be fully charged and in
serviceable condition before beginning these
tests, refer to 8A Electrical Body and Chassis.

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ISUZU KB P190 2007

Starting System – V6 Page 6D1-2–16

Engine Compartment Relay And Fuse Panel


Figure 6D1-2 – 4

1 Remove fuses SBF5 and SBF9 from the engine compartment fuse panel to disable the ignition and prevent the engine from starting, refer to 8A Electrical Body and Chassis.
2 Chock the wheels.
3 For vehicles fitted with automatic transmission ensure the transmission is in P (park) or N (neutral) and the hand brake is applied.
4 Ensure the engine is at room temperature or normal operating temperature and in good working order.
Bad Connection Test
A bad connection appears as a voltage reading when the multimeter leads are connected to two different positive (or
negative) connections.
1 Using a multimeter set to measure voltage, connect the multimeter’s positive lead to the positive battery post.
2 Connect the multimeter’s negative lead to the starter motor M terminal.
3 Record the voltage that displayed during cranking.
4 Repeat this with the multimeter’s negative lead connected to the solenoid switch connector P – 4 pin B (circuit 1).
5 Also repeat this connecting the multimeter’s negative lead to the battery cable strands.
6 Restore all connections that show a significant resistance (voltage reading).

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ISUZU KB P190 2007

Starting System – V6 Page 6D1-2–32

7 Special Tools
Tool Number Illustration Description Tool Classification
KM609
Connector Test Adaptor Kit
Used when carrying out electrical
diagnostic circuit checks.
Previously released

Desirable
3588
(J39200)

Digital Multimeter
Must have at least 10 M Ω input
impedance and be capable of reading
frequencies.
Previously released.

Available
EN – 46114 Engine Lifting Brackets
Available



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ISUZU KB P190 2007

Battery Page 6D1-3–3

1 General Information
The vehicle is fitted with a 12 V battery located in the front right-hand corner of the engine compartment. The battery
provides:
• power for cranking the engine,
• power for a limited time when the electrical load exceeds the generator output,
• power for the accessories when the engine is not running, and
• a voltage stabilising load for the electrical system.
1.1 WARNING, CAUTION and NOTES
This Section contains various W ARNINGS, CAUTIONS and NOTE statements that you must observe carefully to reduce
the risk of death or injury during service, repair procedures or vehicle operation. Incorrect service or repair procedures
may damage the vehicle or cause operational faults. W ARNINGS, CAUTION and NOTE statements are not exhaustive.
HOLDEN LTD can not possibly warn of all the potentially hazardous consequences of failure to follow these instructions.
Definition of WARNING, CAUTION and NOTE Statements

Diagnosis and repair procedures in this Section contain both general and specific W ARNING, CAUTION and NOTE
statements. HOLDEN LTD is dedicated to the presentation of service information that helps the technician to diagnose
and repair the systems necessary for proper operation of the vehicle. Certain procedures may present a hazard to the
technician if they are not followed in the recommended manner. W ARNING, CAUTION and NOTE statements are
designed to help prevent these hazards from occurring, but not all hazards can be foreseen.
WARNING defined
A W ARNING statement immediately precedes an operating procedure or maintenance practice which, if not correctly
followed, could result in death or injury. A W ARNING statement alerts you to take necessary action or not to take a
prohibited action. If a W ARNING statement is ignored, the following consequences may occur:
• Death or injury to the technician or other personnel working on the vehicle,
• Death or injury to other people in or near the workplace area, and / or
• Death or injury to the driver / or passenger(s) of the vehicle or other people, if the vehicle has been improperly
repaired.
CAUTION defined
A CAUTION statement immediately precedes an operating procedure or maintenance practice which, if not correctly
followed, could result in damage to or destruction of equipment, or corruption of data. If a CAUTION statement is ignored,
the following consequences may occur:
• Damage to the vehicle,
• Unnecessary vehicle repairs or component replacement,
• Faulty operation or performance of any system or component being repaired,
• Damage to any system or components which depend on the proper operation of the system or component being
repaired,
• Faulty operation or performance of any systems or components which depend on the proper operation or
performance of the system or component under repair,
• Damage to fasteners, basic tools or special tools and / or
• Leakage of coolant, lubricant or other vital fluids.
NOTE defined
A NOTE statement immediately precedes or follows an operating procedure, maintenance practice or condition that
requires highlighting. A NOTE statement also emphasises necessary characteristics of a diagnostic or repair procedure.
A NOTE statement is designed to:

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ISUZU KB P190 2007

Battery Page 6D1-3–4

• Clarify a procedure,
• Present additional information for accomplishing a procedure,
• Give insight into the reasons for performing a procedure in the recommended manner, and / or
Present information that gives the technician the benefit of past experience in accomplishing a procedure with greater
ease.
1.2 Battery Terminals and Cables
The cables attached to the battery posts provide power and ground connections for the vehicle electrical system. These
battery cables attach to the battery posts via nut-tightened terminals. The battery is held in position by a hold-down
bracket and bolts. Refer to Figure 6D1-3 – 1.

Figure 6D1-3 – 1
Legend
1 Negative Battery Post
2 Negative Battery Terminal
3 Negative Battery Terminal Bolt
4 Negative Battery Terminal Nut
5 Positive Connection Cover
6 Battery Positive Cable Nut 7 Battery Positive Cable Assembly
8 Battery Fuse Box Nut
9 Battery Fuse Box Washer
10 Main Fuse Box Supply
11 Positive Battery Terminal
12 Positive Battery Terminal Nut 13 Positive Battery Terminal Bolt
14 Positive Battery Post
15 Battery Positive Cable Assembly
16 Battery Positive Cable Assembly
17 Battery Hold Down Bracket
18 Battery Hold Down Bolts
19 Battery Hold Down Bolt
1.3 Battery Ratings
There are two battery ratings to consider when replacing a battery, reserve capacity (RC) and cold cranking amps (CCA).
Ensure the replacement battery meets or exceeds these rating specifications.
Reserve Capacity
The RC of a battery is the amount of time (measured in minutes) the vehicle will travel at night with minimum electrical
load and no generator input.

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ISUZU KB P190 2007

Battery Page 6D1-3–7

3 Diagnosis
3.1 Diagnostic Procedures
Introduction
This test is used to aid in diagnosing faults with the vehicle where the battery seems to be at fault.
W ith the increased use of electronic sensors and computer control, the battery is much more than just a component used
to start a car. Low battery voltage can:
• affect the operation of the vehicle control modules and cause driveability problems, and
• cause the control modules to set diagnostic trouble codes (DTCs).
For example if a control module senses low battery voltage, it may increase fuel injector timing to increase engine rpm to
increase the generator output.
Therefore consider the state of charge of the battery any time a customer complains of a driveability related problem.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
1 Checks the operator understands the safety precautions for working with batteries.
2 Checks if the vehicle is fitted with a battery of the correct specification.
3 Checks if the battery appears serviceable by performing the battery inspection procedure.
4 Checks if the battery loses charge over an extended period. If so the likely problem is excess current draw while the vehicles ignition is in the off position.
5 Checks the state of charge of the battery.
6 Checks if the battery is capable of delivering the required load by performing the load test procedure.
Diagnostic Table Notes
1 For all wiring harness fault diagnosis, refer to 8A Electrical Body & Chassis.
2 For wiring harness repairs, refer to 8A Electrical Body & Chassis.
3 Refer to 6D1 – 3 Battery – V6.
Diagnostic Table
Step Action Yes No
1
Have you read and understood the safety precautions for working with
batteries? Go to Step 2 Refer to 2
Safety Precautions
2 Check the battery fitted is the correct specification recommended for
the vehicle? Refer to 5 Specifications.
Is the battery the correct specification? Go to Step 3 Replace the battery
with the correct
specification
3 Perform the battery inspection, refer to 3.2 Battery Inspection.
Does the battery appear serviceable? Go to Step 4 Replace the battery,
refer to 4.1
Battery
4 Does the customer complain the battery loses charge if the engine is
not started for an extended period? Preform the battery
current draw test, refer to 3.5
Battery
Current Draw Test Go to Step 5

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ISUZU KB P190 2007