2007 ISUZU KB P190 park assist

Starting System – V6 Page 6D1-2–10

2.5 Starting System Inoperative /
Malfunctioning
Circuit Description
The battery cable supplies a constant connection from the battery to starter solenoid connector P – 4.
W hen the ignition switch is turned to the START position, 12 V is applied to the ECM connector C – 56 pin 31.
For vehicles with 4 speed automatic transmission, when the transmission is in park (P) or neutral (N), the park / neutral
and back-up switch grounds ECM connector C – 56 pin 32.
The ECM provides a ground for the start relay, ECM connector C – 56 pin 35 to start relay connector X – 13 pin 5.
W hen activated the start relay provides 12 V to starter solenoid connector P – 3 pin 1.
The solenoid closes its switch contacts to connect the battery voltage at the solenoid switch terminal P – 4 terminal B to
the DC motor. The pull-in winding of the solenoid switch is grounded through the DC motor winding and brushes. The
hold-in winding is grounded through the solenoid casing. The DC motor is grounded through the starter motor casing.
Refer to 2.4 W iring Diagram to aid in diagnosis.
Diagnostic Table Notes
Reference to following information will assist when diagnosing starting circuit faults:
1 If the battery, starter motor and fuel system are deemed as serviceable and a ‘no crank’ and / or ‘no start’ condition exists, refer to the following Sections as required:
a 11A Immobiliser for theft deterrent engine crank inhibitor related faults
b 6C1-2 Engine Management V6 Diagnostics, for starter relay circuit faults
2 For all wiring harness fault diagnoses, refer to 8A Electrical Body and Chassis.
3 For wiring harness repairs, refer to 8A Electrical Body and Chassis.
4 Refer to 8A Electrical Body and Chassis for harness routing.
5 Ensure the battery, cables and connections are in good order. Refer to 8A Electrical Body and Chassis.
Diagnostic Table
Step Action Yes No
1
Did you review 1.3 System Operation?
Go to Step 2 Go to 1.3
System
Operation
2 Did you read 2.3 Diagnostic Systems Check
Go to Step 3 Go to 2.3
Diagnostic Systems Check
3 Turn the ignition switch to the START position and then release it.
Did the engine crank or were there any clicking or chattering sounds
from the solenoid? Go to Diagnostic
Table – Slow
Cranking, Solenoid Clicks or Chatters Go to Step 4
4 Inspect fusible link SBF9, refer to 8A Electrical Body and Chassis.
Is fusible link SBF9 blown? Replace the faulty
fusible link (refer to
Note 3).
If the fusible link
blows again, repair
or replace the circuit from SBF9 to the
starter relay X – 13 pin 1 or ignition
switch B – 62 pin 2 (refer to Note 2) Go to Step 5

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ISUZU KB P190 2007

Starting System – V6 Page 6D1-2–13

Step Action Yes No
16 1 Scroll to Starter Relay
2 Ensure the transmission is in park (P) or neutral (N).
3 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 18 Go to Step 17
17 1 Disconnect the ECM connector C – 56.
2 Using a multimeter set to measure voltage, back probe between the harness connector C – 56 pin 32 and ground.
3 W ith the aid of an assistant, monitor the voltage on the multimeter.
• Place the transmission in park (P), the multimeter should
display 0 V
• Place the transmission in neutral (N), 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 For vehicles fitted
with the 4 speed automatic
transmission refer
to 7C2 Automatic Transmission –
4L60E – On-vehicle Servicing for further
diagnosis of the
park / neutral and back-up switch.

Go to Step 21
18 Test the starter relay.
Refer to 6C1-2 Engine Management – V6 – Diagnostics.
Is the starter relay serviceable? Go to Step 19 Repair or replace
as required
Go to Step 21
19 1 Using a multimeter set to measure voltage, back probe between
the harness connector P – 3 pin 1 and ground.
2 W ith the aid of an assistant, monitor the voltage on the multimeter.
• Turn the ignition switch to START, the multimeter should
display 7.0 V
Does the multimeter display as described? Repair or replace
the starter motor as required.
Refer to 4
Major
Service Operations.
Go to Step 21 Go to Step 20
20 Check for short to ground or open circuit from connector P – 3 pin 1
and the starter relay connector X-13 pin 2.
W as the circuit serviceable? Go to Step 2 Repair as required
(refer to Note 2).
Go to Step 21
21 Operate the system in order to verify the repair.
Did you correct the condition? System OK Go to Step 2
When all diagnosis and repairs are completed, check the system for correct operation.

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ISUZU KB P190 2007

Battery Page 6D1-3–16

NOTE
Charging a battery at higher current rates can
significantly reduce the life of the battery.
Charge Rate Initial Current Maximum Time Required
Slow charge 4 A 24 hours
Fast charge 35 A 2 hours
6 After a few minutes, check the colour and specific gravity of the electrolyte. Refer to 3.3 Hydrometer Test.
7 Monitor the electrolyte temperature while the battery is charging. If the electrolyte temperature reaches 55 °C:
a switch the charging current off,
b allow the battery to cool,
c reduce the charging current, and
d restart charging the battery.
NOTE
For the best results, charge the battery with the
electrolyte and plates at room temperature. An
extremely cold battery may not appear to accept
current for several hours after starting the battery
charger. If the battery does not appear to accept
charge after several hours replace the battery.
8 For slow charging check the voltage and specific gravity each hour or more regularly for fast charging. Stop the charging when there is no change in voltage or electrolyte specific gravity over three checks.
9 If the battery was fast charged connect the battery to a slow-charger for a few hours to bring the battery to the fully charged condition. Ensure the last few hours of charge do not exceed 1 A.
10 Tighten the filler caps. Ensure they are secure.
11 Install the battery in the vehicle. Refer to 4.1 Battery.
4.3 Emergency Jump Starting Procedure
Safety Precautions
• Read and obey the general safety precautions for working with batteries, refer to 2 Safety Precautions.
• Do not allow the vehicles to touch each other during the jump starting procedure.
• Ensure the assisting vehicle battery has the same voltage rating and connects negative to ground. If this is not the
case, serious injury and damage to electrical equipment can result.
• Do not push or tow the vehicle to start it. Damage can result when unburnt fuel reaches the catalytic converter and
ignites.
• Do not start the vehicle using a fast charger.
• W hen using jumper leads, treat both the booster battery and the discharged battery with care.
• Do not allow sparks, flame or smoking near the battery.
• Ensure that metal tools or jumper cables do not simultaneously contact the battery positive terminal and any other
metal part of the vehicle.
Jump Starting Procedure
1 Position the assisting vehicle so the batteries of both vehicles are close together, refer to Figure 6D1-3 – 10.
2 Apply the park brake on both vehicles.
3 Ensure that P (park) is selected for automatic transmission and N (neutral) is selected for manual transmissions.

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-25
Scan Tool Data Definitions
This information will assist in driveability problems. The
displays can be viewed while the vehicle is being
driven. Always perform the Diagnostic System Check -
Transmission Controls first. The Diagnostic System
Check will confirm proper system operation.
Accelerator Pedal Position
This parameter displays the angle of the accelerator
pedal as calculated by the engine control module
(ECM) using the signals from the accelerator pedal
position (APP) sensors. This data is sent over the pulse
wave modulation (PWM) signal from the ECM to the
TCM. The scan tool will display linearly from 0 to 100%
according to the pedal operation.
Engine Speed
This parameter displays the rotational speed of the
crankshaft as calculated by the engine control module
(ECM) based on inputs from the crankshaft position
sensor or camshaft position sensor. This data is sent
over the pulse signal from the ECM to the TCM.
AT Input Speed (Automatic Transmission)
This parameter displays the rotational speed of the
reverse & high clutch drum as calculated by the TCM
based on inputs from the input shaft speed (ISS)
sensor.
TCC Slip Speed (Torque Converter Clutch)
This parameter displays the difference between
transmission input shaft speed and the engine speed
(engine speed - input shaft speed). A negative value
indicates that the engine speed is less than the input
shaft speed, deceleration. A positive value indicates
that the engine speed is greater than the input shaft
speed, acceleration. A value of zero indicates that the
engine speed is equal to the input shaft speed, torque
converter clutch (TCC) is applied.
AT Output Speed (Automatic Transmission)
This parameter displays the rotational speed of the
parking gear that is connected to the output shaft as
calculated by the TCM based on inputs from the output
shaft speed (OSS) sensor. Vehicle Speed
This parameter indicates the vehicle speed calculated
by the TCM using the signal from the output shaft
speed sensor. The scan tool will display a low value at
lower vehicle speeds, and a high value at higher
vehicle speeds.
Current Gear
This parameter displays the current gear position
based on the command from the TCM.
Estimated Gear Ratio
This parameter displays the current gear ratio
calculated by the TCM using the signal from the input
shaft speed (ISS) sensor and the output speed sensor
(OSS) sensor.
Transmission Range (TR)
This parameter displays the selector lever position
based on the transmission range (TR) switch inputs.
TR Switch P, R, N, D, 3, 2, L (Transmission Range)
This parameter displays the input state of the
transmission range (TR) switch to the TCM. When the
selector lever is moved to each range, the scan tool
displays On.
PCS Command (Pressure Control Solenoid)
This parameter displays the commanded state of the
pressure control (PC) solenoid valve control circuit. On
indicates the solenoid valve is being energized by the
TCM, allowing line pressure to be low.
Low & Reverse Brake Solenoid Command
This parameter displays the low & reverse brake
solenoid valve control duty ratio based on the
command for the TCM. The scan tool will display a
lower percentage when the low & reverse brake is
controlled to engage (fluid pressure is applied to the
low & reverse brake hydraulic circuits). The scan tool
will display higher percentage when the low & reverse
brake is controlled to disengage (fluid pressure is
drained from the low & reverse brake hydraulic
circuits).
TCM Status Up Slope (Transmission Control Module) On/ OffOff
3rd Start Switch On/ OffOff
3rd Start Lamp On/ OffOff
Power Drive Switch On/ OffOff
Power Drive Lamp On/ OffOff
Brake Pedal Switch On/ OffOff
Diagnostic Switch On/ OffOff
Check Trans Lamp On/ OffOff
Scan Tool Parameter
Units DisplayedTypical Data

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ISUZU KB P190 2007