2007 ISUZU KB P190 Workshop Repair Manual

clock isofix differential coolant capacity battery replacement ESP inoperative

Page 4377 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-93
Intermittent Conditions
ChecksAction
Definition:
The problem is not currently present but is indicated in DTC History.
OR
There is a customer complaint

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-93
Intermittent Conditions
ChecksAction
Definition:
The problem is not currently present but is indicated in DTC History.
OR
There is a customer complaint, but the symptom cannot currently be duplicated, if the problem is not DTC related.
Preliminary Checks • Refer to Symptoms - Transmission Controls before starting.
Harness/ Connector Many intermittent open or shorted circuits are affected by harness/ connector
movement that is caused by vibration, engine torque, bumps/ rough pavement, etc.
Test for this type of condition by performing the applicable procedure from the
following list:
• Move related connectors and wiring while monitoring the appropriate scan tool data.
• Move related connectors and wiring with the component commanded ON, and OFF, with the scan tool. Observe the component operation.
• With the engine running, move related connectors and wiring while monitoring engine operation.
If harness or connector movement affects the data displayed, component/ system
operation, or engine operation, inspect and repair the harness/ connections as
necessary.
Electrical Connections or Wiring Poor electrical connections, terminal tension or wiring problems cause most intermittent. To perform the following inspections:
• Poor mating of the connector halves, or terminals improperly seated in the connector body.
• Improperly formed or damaged terminals. Test for poor terminal tension.
• Poor terminal to wire connections including terminals crimped over insulation. This requires removing the terminal from the connector body.
• Corrosion/ water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation, with little
visible evidence. Look for swollen and stiff sections of wire in the suspect
circuits.
• Wires that are broken inside the insulation.
• Harness for pinched, cut or rubbed through wiring.
• Ensure that the wiring does not come in contact with hot exhaust components.
Control Module Power and Grounds
Component Power and Grounds Poor power or ground connections can cause widely varying symptoms.
• Test all control module power supply circuits. Many vehicles have multiple circuits supplying power to the control module. Other components in the system
may have separate power supply circuits that may also need to be tested.
Inspect connections at the module/ component connectors, fuses, and any
intermediate connections between the power source and the module/
component. A test lamp or a DMM may indicate that voltage is present, but
neither tests the ability of the circuit to carry sufficient current. Ensure that the
circuit can carry the current necessary to operate the component.
• Test all control module ground and system ground circuits. The control module may have multiple ground circuits. Other components in the system may have
separate grounds that may also need to be tested. Inspect grounds for clean
and tight connections at the grounding point. Inspect the connections at the
component and in splice packs, where applicable. Ensure that the circuit can
carry the current necessary to operate the component.

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ISUZU KB P190 2007

Page 4378 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-94 TRANSMISSION CONTROL SYSTEM (JR405E)
Temperature Sensitivity• An intermittent condition may occur when a component/ connection reaches
normal operating temperature. The condition may occur

7A2-94 TRANSMISSION CONTROL SYSTEM (JR405E)
Temperature Sensitivity• An intermittent condition may occur when a component/ connection reaches
normal operating temperature. The condition may occur only when the
component/ connection is cold, or only when the component/ connection is hot.
• If the intermittent is related to heat, review the data for a relationship with the following:
- High ambient temperatures.
- Underhood/ engine generated heat.
- Circuit generated heat due to a poor connection, or high electrical load.
- Higher than normal load conditions, towing, etc.
• If the intermittent is related to cold, review the data for the following: - Low ambient temperatures-In extremely low temperatures, ice may form in a connection or component. Test for water intrusion.
- The condition only occurs on a cold start.
- The condition goes away when the vehicle warms up.
• Information from the customer may help to determine if the trouble follows a pattern that is temperature related.
Electromagnetic Interference (EMI) and
Electrical Noise Some electrical components/ circuits are sensitive to EMI or other types of electrical
noise. Inspect the following conditions:
• A misrouted harness that is too close to high voltage/ high current devices such as injection components, motors, generator etc. These components may
induce electrical noise on a circuit that could interfere with normal circuit
operation.
• Electrical system interference caused by a malfunctioning relay, or the TCM driven solenoid or switch. These conditions can cause a sharp electrical surge.
Normally, the problem will occur when the malfunctioning component is
operating.
• Improper installation of non-factory or aftermarket add on accessories such as lights, 2-way radios, amplifiers, electric motors, remote starters, alarm systems,
cell phones, etc. These accessories may lead to an emission related failure
while in use, but do not fail when the accessories are not in use.
• Test for any open diodes. Some relays may contain a clamping diode.
• Test the generator for a bad rectifier bridge that may be allowing AC noise into the electrical system.
Incorrect TCM Programming • There are only a few situations where reprogramming a TCM is appropriate:
- An ECM from another vehicle is installed.
- Revised software/ calibration files have been released for this vehicle.
Important: DO NOT reprogram the TCM with the SAME software/ calibration files
that are already present in the TCM. This is not an effective repair for any type of
driveability problem.
• Verify that the TCM contains the correct software/ calibration. If incorrect programming is found, reprogram the TCM with the most current software/
calibration.
Duplicating Failure Conditions • If none of the previous tests are successful, attempt to duplicate and/ or capture
the failure conditions.
• An alternate method is to drive the vehicle with the DMM connected to a suspected circuit. An abnormal reading on the DMM when the problem occurs,
may help you locate the problem.
Scan Tool Snapshot The scan tool can be set up to take a Snapshot of the parameters available via serial
data. The Snapshot function records live data over a period of time. The recorded
data can be played back and analyzed. The scan tool can also graph parameters
singly or in combinations of parameters for comparison. The Snapshot can be
triggered manually at the time the symptom is noticed, or set up in advance to trigger
when a DTC sets.
An abnormal value captured in the recorded data may point to a system or
component that needs to be investigated further.
Refer to the scan tool Users Guide for more information.
Checks
Action

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ISUZU KB P190 2007

Page 4379 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-95
Vehicle Does Not Run
Trouble at Starting
Faulty Gearshift
Faulty Shift Pattern
No or Error Gearshift
Faulty Operation During Running
Faulty Operation in

Page 4380 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-96 TRANSMISSION CONTROL SYSTEM (JR405E)
Faulty GearshiftEngine race up (slipping) when gearshift is up from 1st to 2nd C1
Engine race up (slipping) when gearshift is up from 2nd to 3rd C2
Engin

7A2-96 TRANSMISSION CONTROL SYSTEM (JR405E)
Faulty GearshiftEngine race up (slipping) when gearshift is up from 1st to 2nd C1
Engine race up (slipping) when gearshift is up from 2nd to 3rd C2
Engine race up (slipping) when gearshift is up from 3rd to 4th C3
Engine race up (slipping) when gearshift is down from 4th to 3rd C4
Engine race up (slipping) when gearshift is down (or kick-down) from
4th to 2nd C5
Engine race up (slipping) when gearshift is down (or kick-down) from
3rd to 2nd C6
Engine race up (slipping) when gearshift is down (or kick-down) from
4th or 3rd to 2nd C7
Engine race up (slipping) others C8
Braking feel when gearshift is up from 1st to 2nd C9
Braking feel when gearshift is up from 2nd to 3rd C10
Braking feel when gearshift is up from 3rd to 4th C11
Large shock when gearshift from 1st to 2nd or 2nd to 1st C12
Large shock when gearshift from 2nd to 3rd or 3rd to 2nd C13
Large shock when gearshift from 3rd to 4th or 4th to 3rd C14
Large shock when kick-down C15
Large shock when accelerator pedal is stepped ON or OFF without
gearshift C16
Large shock when gearshift from 2nd to 1st in L range C17
Large shock others C18
Large shock when vehicle speed is reduced by no accelerator pedal or
vehicle is stopped C19
Large shock at lock up C20
Shift down or engine overrun when accelerator pedal is stepped ON in
4th gear C21
Faulty Shift Pattern Faulty gearshift schedule (different from shift speed chart) D1
Gearshift frequently D2
Gearshift point is low or high at all points D3
Gearshift point is low or high at limited area D4
No kick-down D5
No or Error Gearshift No gearshift E1
Only 4th gear is not selectable E2
Gear is changed from 2nd to 3rd in 2 range E3
Gear is changed from 1st to 2nd in L range E4
Gear is changed from 3rd to 4th in 3 range E5
Faulty Operation During Running Low maximum speed or poor acceleration F1
Only 4th gear is not selectable F2
Noise or vibration occurs during in R, D, 3, 2 or L range F3
Engine brake does not apply in L range F4
Engine stalls before vehicle stops from running F5
Diagnostic Category
Category No.

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ISUZU KB P190 2007

Page 4381 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-97
Faulty Operation in Stopping Vehicle moves in P range or parking is not disengaged in other than Prange G1
Large creeping force G2
Small creeping force G3

Page 4382 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-98 TRANSMISSION CONTROL SYSTEM (JR405E)
A1Vehicle does not run in D, 3, 2, L & L rangeA2Vehicle does not run in R rangeA3Vehicle does not run in D, 3, 2 and L rangeB1Vehicle runs in N rangeB2Poo

7A2-98 TRANSMISSION CONTROL SYSTEM (JR405E)
A1Vehicle does not run in D, 3, 2, L & L rangeA2Vehicle does not run in R rangeA3Vehicle does not run in D, 3, 2 and L rangeB1Vehicle runs in N rangeB2Poor acceleration at startingB3Engine races up during starting (slip)B4
Large shock when selector lever is changed
from N to D range or N to R range
B5
Engine stalls when selector lever is changed
from N to R, D, 3, 2 or L range
B6 Engine does not crank in P or N rangeB7Engine cranks in other than P or N rangeB8
Extended time lag when selector lever is
changed from N to D
B9
Extended time lag when selector lever is
changed from N to R
B10 Brake is applied in R rangeB11Insufficient starting or shaking in D rangeB12Noise or vibration occurs at starting
Error, open or short circuit
Error, open or short circuit
Error, open or short circuit
Error, open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Error, open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Out of standard value
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Slip
Seizure
Faulty operation
Separation
Faulty operation
Engine speed signal
Accelerator pedal position signal
Input shaft speed sensor
Output shaft speed sensor
Power drive or 3rd start switch
Transmission range switch
TCM power or ground
Transmission fluid temperature sensor
Pressure control solenoid
Torque converter clutch solenoid
Low & reverse brake solenoid
2-4 brake solenoid
High clutch solenoid
Low clutch solenoid
Ground return circuit
Low & reverse brake fluid pressure switch
2-4 brake fluid pressure switch
High clutch fluid pressure switch
Transmission fluid quantity
Control spool valve
High clutch solenoid accumulator
Low clutch solenoid accumulator
Low & reverse brake solenoid accumulator
2-4 brake solenoid accumulator
High clutch accumulator
2-4 brake accumulator
Pressure control solenoid hydraulic circuit
Torque converter clutch hydraulic circuit
High clutch solenoid hydraulic circuit
Low clutch solenoid hydraulic circuit
Low & reverse brake solenoid hydraulic circuit
2-4 brake solenoid hydraulic circuit
Oil cooler
Torque converter
Diagnostic category

Possible causes
Electrical
Disordered selector lever cable
Disordered transmission range switch
Faulty line pressure
Faulty engine idle speed
Clutch (brake)
Torque converter clutch piston
Hydraulic control
Powertrain

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ISUZU KB P190 2007

Page 4383 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-99
C1
Engine race up (slipping) when gearshift is
up from 1st to 2nd
C2
Engine race up (slipping) when gearshift is
up from 2nd to 3rd
C3
Engine race up (sl

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-99
C1
Engine race up (slipping) when gearshift is
up from 1st to 2nd
C2
Engine race up (slipping) when gearshift is
up from 2nd to 3rd
C3
Engine race up (slipping) when gearshift is
up from 3rd to 4th
C4
Engine race up (slipping) when gearshift is
down from 4th to 3rd
C5
Engine race up (slipping) when gearshift is
down (or kick-down) from 4th to 2nd
C6
Engine race up (slipping) when gearshift is
down (or kick-down) from 3rd to 2nd
C7
Engine race up (slipping) when gearshift is
down (or kick-down) from 4th or 3rd to 2nd
C8 Engine race up (slipping) othersC9
Braking feel when gearshift is up from 1st to
2nd
C10
Braking feel when gearshift is up from 2nd to
3rd
C11
Braking feel when gearshift is up from 3rd to
4th
C12
Large shock when gearshift from 1st to 2nd
or 2nd to 1st
C13
Large shock when gearshift from 2nd to 3rd
or 3rd to 2nd
C14
Large shock when gearshift from 3rd to 4th
or 4th to 3rd
C15 Large shock when kick-downC16
Large shock when accelerator pedal is
stepped ON or OFF without gearshift
C17
Large shock when gearshift from 2nd to 1st
in L range
C18 Large shock othersC19
Large shock when vehicle speed is reduced
by no accelerator pedal or vehicle is stopped
C20 Large shock at lock upC21
Shift down or engine overrun when
accelerator pedal is stepped ON in 4th gear
Error, open or short circuit
Error, open or short circuit
Error, open or short circuit
Error, open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Error, open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Out of standard value
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Slip
Seizure
Faulty operation
Separation
Faulty operation
Engine speed signal
Accelerator pedal position signal
Input shaft speed sensor
Output shaft speed sensor
Power drive or 3rd start switch
Transmission range switch
TCM power or ground
Transmission fluid temperature sensor
Pressure control solenoid
Torque converter clutch solenoid
Low & reverse brake solenoid
2-4 brake solenoid
High clutch solenoid
Low clutch solenoid
Ground return circuit
Low & reverse brake fluid pressure switch
2-4 brake fluid pressure switch
High clutch fluid pressure switch
Transmission fluid quantity
Control spool valve
High clutch solenoid accumulator
Low clutch solenoid accumulator
Low & reverse brake solenoid accumulator
2-4 brake solenoid accumulator
High clutch accumulator
2-4 brake accumulator
Pressure control solenoid hydraulic circuit
Torque converter clutch hydraulic circuit
High clutch solenoid hydraulic circuit
Low clutch solenoid hydraulic circuit
Low & reverse brake solenoid hydraulic circuit
2-4 brake solenoid hydraulic circuit
Oil cooler
Torque converter
Clutch (brake)
Torque converter clutch piston
Hydraulic control
Powertrain
Diagnostic category

Possible causes
Electrical
Disordered selector lever cable
Disordered transmission range switch
Faulty line pressure
Faulty engine idle speed

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ISUZU KB P190 2007

Page 4384 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-100 TRANSMISSION CONTROL SYSTEM (JR405E)
D1
Faulty gearshift schedule (different from shift
speed chart)
D2 Gearshift frequentlyD3Gearshift point is low or high at all pointsD4Gearshift point i

7A2-100 TRANSMISSION CONTROL SYSTEM (JR405E)
D1
Faulty gearshift schedule (different from shift
speed chart)
D2 Gearshift frequentlyD3Gearshift point is low or high at all pointsD4Gearshift point is low or high at limited areaD5No kick-downE1No gearshiftE2Only 4th gear is not selectableE3Gear is changed from 2nd to 3rd in 2 rangeE4Gear is changed from 1st to 2nd in L rangeE5Gear is changed from 3rd to 4th in 3 rangeF1Low maximum speed or poor accelerationF2Only 4th gear is not selectableF3
Noise or vibration occurs during in R, D, 3, 2
or L range
F4 Engine brake does not apply in L rangeF5
Engine stalls before vehicle stops from
running
G1
Vehicle moves in P range or parking is not
disengaged in other than P range
G2 Large creeping forceG3Small creeping forceG4Large noise during idle with vehicle stopH1Judder Occurs at Lock UpH2Large Shock at Lock UpH3Lock Up Point is High or LowI1No Lock Up
Error, open or short circuit
Error, open or short circuit
Error, open or short circuit
Error, open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Error, open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Open or short circuit
Out of standard value
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Faulty operation
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Clogged passage
Slip
Seizure
Faulty operation
Separation
Faulty operation
Engine speed signal
Accelerator pedal position signal
Input shaft speed sensor
Output shaft speed sensor
Power drive or 3rd start switch
Transmission range switch
TCM power or ground
Transmission fluid temperature sensor
Pressure control solenoid
Torque converter clutch solenoid
Low & reverse brake solenoid
2-4 brake solenoid
High clutch solenoid
Low clutch solenoid
Ground return circuit
Low & reverse brake fluid pressure switch
2-4 brake fluid pressure switch
High clutch fluid pressure switch
Transmission fluid quantity
Control spool valve
High clutch solenoid accumulator
Low clutch solenoid accumulator
Low & reverse brake solenoid accumulator
2-4 brake solenoid accumulator
High clutch accumulator
2-4 brake accumulator
Pressure control solenoid hydraulic circuit
Torque converter clutch hydraulic circuit
High clutch solenoid hydraulic circuit
Low clutch solenoid hydraulic circuit
Low & reverse brake solenoid hydraulic circuit
2-4 brake solenoid hydraulic circuit
Oil cooler
Torque converter
Diagnostic category

Possible causes
Electrical
Disordered selector lever cable
Disordered transmission range switch
Faulty line pressure
Faulty engine idle speed
Clutch (brake)
Torque converter clutch piston
Hydraulic control
Powertrain

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ISUZU KB P190 2007

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