2004 ISUZU TF SERIES Workshop Manual

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Page 4001 of 4264

ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-9
DIAGNOSIS WITH TECH 2
In this JR405E transmission, troubleshooting can be performed for electrical faults using the Tech 2 scan tool.
If the "CHECK TRANS" lamp blinks, or

DIAGNOSIS (JR405E) 7A2-9
DIAGNOSIS WITH TECH 2
In this JR405E transmission, troubleshooting can be performed for electrical faults using the Tech 2 scan tool.
If the "CHECK TRANS" lamp blinks, or if an electrical fault in the transmission may probably exit, check trouble
codes using the Tech 2 scan tool.
In the diagnostic procedures described in this manual, first repair the faulty positions indicated by trouble code in
order of numbers and then perform troubleshooting for the faulty positions that are not indicated by trouble code.
For correct troubleshooting, it is necessary to first repair the trouble codes of lower order numbers, then to repair
the trouble codes of higher order numbers in sequence.

If no codes are set:
Refer to F1: Data Display and identify the electrical faults that are not indicated by trouble code.
Refer to "SYMPTOM DIAGNOSIS".

If codes are set:
1. Record all trouble codes displayed by Tech 2 and check id the codes are intermittent.
2. Clear the codes.
3. Drive the vehicle for a test to reproduce the faulty status.
4. Check trouble codes again using the Tech 2.
5. If no codes is displayed by test driving, the fault is intermittent. In this case, refer to "INTERMITTENT
DIAGNOSIS".
6. If a code is present, refer to DTC Chart for diagnosis.
7. Check trouble codes again using the Tech 2.

TECH 2 CONNECTION
Tech 2 scan tool is used to electrically diagnose the automatic
transmission system and to check the system. The Tech 2
enhances the diagnosis efficiency though all the
troubleshooting can be done without the Tech 2.
1. Configuration of Tech 2
Tech 2 scan tool kit (No. 7000086), Tech 2 scan tool
(No. 7000057) and DLC cable (No. 3000095).
SAE 16/19 adapter (No. 3000098) (1), RS232 loop back
connector (No. 3000112) (2) and PCMCIA card (No.
3000117) (3).

2. Tech 2 Connection
Check the key switch is turn OFF.
Insert the PCMCIA card (1) into the Tech 2 (4).
Connect the SAE 16/19 adapter (2) to the DLC cable (3).
Connect the DLC cable (3) to the Tech 2 (4).
Connect the SAE 16/19 adapter (2) to the data link
connector of the vehicle.
Turn the key switch of the vehicle ON and press the
"PWR" key of the Tech 2.
Check the display of the Tech 2.

Page 4002 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-10 DIAGNOSIS (JR405E)

NOTE:
Be sure to check that the power is not supplied to the
Tech 2 when attaching or removing the PCMCIA card.

Page 4003 of 4264

ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-11
TECH 2 OPERATING FLOW CART (START UP)

Select "AT JR405E" in Vehicle Identification menu and the following table is shown in the Tech 2 screen.

Page 4004 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-12 DIAGNOSIS (JR405E)
F0: Diagnostic Trouble Code
F0: Read DTC Infor As Stored By ECU
F1: Clear DTC Information
F1: Data Display
F2: Snapshot
F3: Miscellaneous Test
F0: Lamp
F0: Power Lamp Test

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ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-13
TYPICAL SCAN DATA

Page 4006 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-14 DIAGNOSIS (JR405E)
MISCELLANEOUS TEST
The state of each circuit can be tested by using miscellaneous test menus. Especially when DTC cannot be
detected, a faulty circuit can be diagnosed

Page 4007 of 4264

ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-15
F0: Low & Reverse Brake Solenoid

Low & Reverse Brake Solenoid

Low & Reverse Brake Duty 0%

Press "Active" key.
Then, duty datio is indicated 1

Page 4008 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-16 DIAGNOSIS (JR405E)
INTERMITTENT DIAGNOSIS
If the Tech 2 displays any codes as intermittent, or if after a test drive any codes does not reappear, the problem is
most likely a faulty electri

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