Isuzu KB P190. Manual - part 1076

7A2-20   TRANSMISSION CONTROL SYSTEM (JR405E)

Transmission In-line Harness Connector

Transmission 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

1 2 3 4 5 6

7 8 9 10 11 12

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

1 2 3 4 5 6

7

8

9 10

TRANSMISSION CONTROL SYSTEM (JR405E)   7A2-21

Diagnostic Information and Procedures

Diagnostic Starting Point - Transmission Controls

Begin the system diagnosis with Diagnostic System
Check - Transmission Controls. The Diagnostic System
Check - Transmission 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 -
Transmission Controls will identify the correct
procedure for diagnosing the system and where the
procedure is located.

Reading Flash Diagnostic Trouble Codes (DTC)

The provision for communicating with the TCM is the
Data Link Connector (DLC). The DTC(s) stored in the
TCM 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
CHECK TRANS lamp when the diagnostic test terminal
of the DLC is grounded. The DLC terminal “11”
(diagnostic request) is pulled “Low” (grounded) by
jumped to DLC terminal “4”, which is a ground wire.
Once terminals “11” and “4” have been connected, turn
the ignition switch ON, with the engine OFF. The
CHECK TRANS lamp initially flashes 12. If more than
one DTC has been stored in the TCM's memory, the
DTCs will be output numerical order with each DTC
being displayed three times. All the stored DTCs are
flashed, then return 12 and continue to flash the DTC. If
no DTC exists, the CHECK TRANS flashes 12
continuously. The flash DTC display will continue as
long as the DLC is shorted. 

Diagnostic Trouble Codes (DTC) Clear Method 

If there is no scan tool, history DTCs can be cleared by
removing the ECM (B) (10A) fuse for at least 10
seconds with the ignition switch OFF. 

Unit: second

13

13

13

32

32

32

12

13

13

13

32

32

32

12

12

Example: DTC 13 stored

ON

OFF

Example: DTC 32 stored

Example: DTC 13 and 32 are stored

ON

OFF

3

1

0.4

0.4

0.4

0.4

3

2

0.4

0.4

0.4

0.4

0.4

2nd digit number

1st digit number

3.2

3.2

0.4

0.4

0.4

1.2

2nd digit number

1st digit number

0.4

0.4

1.2

3.2

3.2

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

TRANSMISSION CONTROL SYSTEM (JR405E)   7A2-23

6

Does the scan tool display TCM DTC P0602?

—

Go to Applicable 

DTC

Go to Step 7

7

Does the scan tool display TCM DTC P0560?

—

Go to Applicable 

DTC

Go to Step 8

8

Is there any other code in any controller that has
not been diagnosed? 

—

Go to Applicable 

DTC

Go to Step 9

9

Is the customer's concern with the engine system?

—

Go to Diagnostic 

System Check - 
Engine Controls

Go to Step 10

10

Drive vehicle and verify if any engine or
transmission related driveability concern exist.

Does an engine or transmission driveability
concern exist?

—

Go to Symptoms - 

Engine Controls in 

engine control 

section or 

Symptoms

Transmission 

Controls

System OK

Step

Action

Value(s)

Yes

No