sensor ISUZU KB P190 2007 Workshop Repair Manual

7A1-34 CONSTRUCTION AND FUNCTION
MAJOR INPUT/OUTPUT COMPONENT AND THEIR FUNCTIONS
Speed sensor Detects output shaft revolution and sends rpm signal to TCM.
Turbine sensor Detects input shaft revolution and sends rpm signal to TCM.
Engine speed sensor Inputs engine revolution from engine control computer.
Brake switch Detects brake pedal operation by the driver and sends signal
to TCM.
Inhibitor switch Detects select lever position and sends signal to TCM.
Mode select switch Detects "Power Drive" or "3rd Start" selected by the driver and
sends signal to TCM.
4L switch (4W D Only) Inputs 4L mode from transfer control computer.
ATF thermo sensor Detects ATF temperature and sends signal to TCM.
High clutch oil pressure switch Detects high clutch supply oil pressure and sends signal to
TCM.
2-4 brake oil pressure switch Detects 2-4 brake supply oil pressure and sends signal to
TCM.
Low & Reverse brake oil pressure switch Detects low & reverse brake supply oil pressure and sends signal to TCM.
Accelerator Pedal position sensor Inputs throttle opening angle from engine control computer.
Input
TCM Judges necessary line pressure, gear shifting point and lock-up
operation based on electrical signals from switches and
sensors and sends appropriate signals to solenoids.
Line pressure solenoid Regulates oil pump delivery pressure to the appropriate line
pressure for current driving conditions based on a signal from
TCM.
Low clutch solenoid Selects appropriate gear shifting position for current driving
conditions and regulates low clutch supply oil pressure based
on a signal from TCM.
High clutch solenoid Selects appropriate gear shifting position for current driving
conditions and regulates high clutch supply oil pressure based
on a signal from TCM.
2-4 brake solenoid Selects appropriate gear shifting position for current driving
conditions and regulates 2-4 brake supply oil pressure based
on a signal from TCM.
Low & Reverse brake solenoid Selects appropriate gear shifting position for current driving
conditions and regulates low & reverse brake supply oil
pressure based on a signal from TCM.
Lock-up solenoid Regulates lock-up pressure to appropriate level for current
driving conditions based on a signal from TCM.
Mode indicator lamp Indicates POW ER DRIVE or 3rd START switch position.
Speed meter signal (2W D Only) Outputs vehicle speed to the speed meter.
A/T OIL TEMP indicator lamp Indicates A/T OIL TEMP indicator lamp in case of high
temperature.
Output
CHECK TRANS indicator lamp Indicates CHECK TRANS indicator lamp in case of
malfunction.



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CONSTRUCTION AND FUNCTION 7A1-35
CONTROL CIRCUIT BLOCK DIAGRAM



Speed sensor
Turbine sensor
Brake switch
Inhibitor switch
Power drive, 3rd start
switch
ATF oil thermo sensor
High clutch oil pressure
switch
2-4 brake oil pressure
switch
Low & reverse brake oil
pressure switch
Transfer control module
(4W D Only)



Engine Control Module
(ECM)
Line pressure solenoid
Low clutch solenoid
High clutch solenoid
2-4 brake solenoid
Low & reverse brake
solenoid
Lock-up solenoid
ATF temperature
indicator lamp
Speed meter (2W D
Only)
Power, 3rd start indicator
lamp
Check trans indicator
lamp
Data link connector Self-diagnosis
function



Transmission
Control
Module (TCM)
4L mode
Tachometer
signal output
APP PW M
position signal
output
Figure 54. Control Circuit Block Diagram

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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-5
Diagnostic Trouble Code (DTC) List
DTC Flash CodeDTC Descriptor
P0560 16 System Voltage Malfunction
P0602 — Control Module Programming Error
P0705 17 Inhibitor Switch Malfunction
P0710 15 Transmission Fluid Temperature Sensor Circuit Malfunction
P0717 14 Input/Turbine Speed Sensor “A” Circuit No Signal
P0722 11 Output Speed Sensor Circuit No Signal
P0727 13 Engine Speed Sensor Input Circuit No Signal
P0731 41 Gear 1 Incorrect Ratio
P0732 42 Gear 2 Incorrect Ratio
P0733 43 Gear 3 Incorrect Ratio
P0734 44 Gear 4 Incorrect Ratio
P0748 35 Line Pressure Solenoid Malfunction
P0753 31 Low & Reverse Brake Duty Solenoid Malfunction
P0758 32 2-4 Brake Duty Solenoid Malfunction
P0763 33 High Clutch Duty Solenoid Malfunction
P0768 34 Low Clutch Duty Solenoid Malfunction
P1120 22 Throttle Position Signal Malfunction
P1750 51 Low & Reverse Brake Fail Safe Valve Malfunction
P1755 52 2-4 Brake Fail Safe Valve Malfunction
P1853 26 Low & Reverse Brake Pressure Switch Malfunction
P1858 27 2-4 Brake Pressure Switch Malfunction
P1860 36 Lock Up Duty Solenoid Malfunction
P1863 28 High Clutch Pressure Switch Malfunction
P1875 25 Ground Return Malfunction

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7A2-10 TRANSMISSION CONTROL SYSTEM (JR405E)
ISS & OSS Sensor, Driving Mode & Brake Switch and APP Signal

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7A2-12 TRANSMISSION CONTROL SYSTEM (JR405E)
PC Solenoid, TCC Solenoid, Shift Solenoid, TFP Switch and TFT Sensor

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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-13
Component Locator
Transmission Controls Component Views
Legend1. Selector lever
2. Power drive and 3rd start switch
Legend 1. Brake pedal switch
2. Brake pedal
Legend 1. Input shaft speed (ISS) sensor
2. Output shaft speed (OSS) sensor
3. Transmission range (TR) switch
4. In-line harness connector
12
1
2
3
1
24

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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-17
Transmission Control Module (TCM)
Connector End Views
TCM (Gray connector)
TCM (White connector)
Connector No.C-94
Connector color Gray
Test adapter No. J-35616-64A
Pin No. Wire color Pin function
1 RED/ WHT Battery voltage
2 YEL/ VIO P range switch signal
3 RED Brake pedal switch signal
4 PNK/ WHT 3rd start lamp control
5 VIO/ GRN Keyword serial data communication
6 — Not used
7 BLK/ RED Engine speed signal input
8 — Not used
9 — Not used
10 BLK/ YEL Vehicle speed signal output (2WD)
11 GRN/ WHT 3rd start switch signal
12 BLU/ WHT 4WD low signal output
13 — Not used
14 — Not used
15 — Not used
16 RED/ WHT Accelerator pedal position (APP) signal input
17 BLK/GRN 3 range switch signal
18 YEL/ BLK Diagnostic request switch
19 ORN/ BLU Transmission oil temperature lamp control
20 GRY/ YEL Check trans lamp control
1
10
19
2
11
20
3
12
21
4
13
5
14
6
15
7
16
22
8
17
23
9
18
24
21 PNK Power lamp control
22 — Not used
23 — Not used
24 GRN/ YEL Power drive switch signal
Connector No. C-95
Connector color White
Test adapter No. J-35616-64A
Pin No. Wire color Pin function
1 RED/ YEL 2-4 brake TFP switch signal
2 PNK/ BLK 2 range switch signal
3 BRN/ RED ISS sensor signal
4 BLU TFT sensor signal
5 BLK Ground
6 BLU/ BLK Low & reverse brake solenoid control
7 BLK/ YEL 2 & 4 brake solenoid control
8 RED High clutch solenoid control
9 WHT/ BLU Low clutch solenoid control
10 RED/ BLK N range switch signal 11 BLU D range switch signal
12 YEL Low & reverse brake TFP switch
13 YEL/ RED OSS sensor signal
14 BLU/ BLK TFT sensor low reference
15 — Not used
16 — Not used
17 BLK TCC solenoid control
18 WHT Ignition voltage
1
10
19
2
11
20
3
12
21
4
13
5
14
6
15
7
16
22
8
17
23
9
18
24

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TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-19
Input Shaft Speed (ISS) Sensor
Output Shaft Speed (OSS) Sensor Power Drive/ 3rd Start Switch
Connector No.
E-31
Connector color Gray
Test adapter No. J-35616-
Pin No. Wire color Pin function 1 BRN/ RED Sensor signal
2 WHT Sensor ignition voltage feed
3 BLK Sensor low reference
Connector No. E-30
Connector color Gray
Test adapter No. J-35616-
Pin No. Wire color Pin function
1 YEL/ RED Sensor signal
12
3
123
2 WHT Sensor ignition voltage feed
3 BLK Sensor low reference
Connector No. B-50
Connector color White
Test adapter No. J-35616-33
Pin No. Wire color Pin function
1 GRN/ RED Illumination lamp voltage feed
2 RED/ GRN (TF) or
BLK (UC) Illumination lamp ground
3 GRN/ YEL Power drive switch signal
4 — Not used
5 GRN/ WHT 3rd start switch signal
6 BLK Switch ground
1
345
2
6

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7A2-20 TRANSMISSION CONTROL SYSTEM (JR405E)
Transmission In-line Harness ConnectorTransmission Range (TR) Switch
Connector No.E-54
Connector color Black
Test adapter No. J-35616-64A
Pin No. Wire color Pin function
1 WHT/ BLK High clutch TFP switch signal
2 BLU TFT sensor signal
3 WHT/ BLU Low clutch solenoid control (PWM)
4 BLK TCC solenoid control (PWM)
5 BLU/ BLK Low & reverse brake solenoid control (PWM)
6 VIO PC solenoid control
7 RED/ YEL 2-4 brake TFP switch signal
8 BLU/ BLK TFT sensor low reference
9 BLK/ YEL 2-4 brake solenoid control (PWM)
10 RED High clutch solenoid control (PWM)
11 GRY/ RED Ground return
12 YEL Low & reverse brake TFP switch signal
RTW77ASH004001
123456
789101112
Connector No. E-51
Connector color Black
Test adapter No. J-35616-64A (pin 1 - 6) J35616-33 (pin 7 - 10)
Pin No. Wire color Pin function
1 BLK/GRN 3 range switch signal
2 YEL/ VIO P range switch signal
3 WHT Ignition voltage feed
4 RED/ YEL R range switch signal
5 BLU D range switch signal
6 PNK/ BLU L range switch signal
7 BLK/ WHT P or N range start switch signal
8 RED/ BLK N range switch signal
9 PNK/ BLK 2 range switch signal
10 BLK P or N range start switch ground
RTW77ASH004101
123456
78910

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7A2-22 TRANSMISSION CONTROL SYSTEM (JR405E)
Diagnostic System Check - Transmission Controls
Description
The Diagnostic System Check - Transmission Controls
is an organized approach to identifying a condition that
is created by a malfunction in the electronic
transmission 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.
8. 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 Transmission 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.
• Ensure the battery has a full charge.
• Ensure the battery cables (+) (-) are clean and tight.
• Ensure the TCM grounds are clean, tight, and in the correct location.
• Ensure the TCM harness connectors are clean and correctly connected.
• Ensure the TCM terminals are clean and correctly mating.
• If there are gear ratio DTC's (P0731, P0732, P0733 or P0734), diagnose sensor DTCs and
solenoid DTCs first.
Diagnostic System Check - Transmission 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.
•TCM
• Electronic hydraulic control unit (EHCU) [ABS module] (If so equipped)
• Supplemental restraint system (SRS) control module (If so equipped)
Does the scan tool communicate with all the listed
control modules? —
Go to Step 3 Go to Scan Tool
Does Not
Communicate with Keyword Device
3 Attempt to start the engine.
Does the engine start and idle? —
Go to Step 4 Go to Engine
Cranks but Does
Not Run in engine control section
4 Select the DTC display function for the following
control modules:
•TCM
• Engine control module (ECM)
Does the scan tool display any DTCs? —
Go to Step 5 Go to Step 9
5 Does the scan tool other control module
communication fault DTCs? —Go to Applicable
DTC Go to Step 6

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