7A–182 AUTOMATIC TRANSMISSION (AW30-40LE)
REASSEMBLY OF MAJOR COMPONENTS
Disassembly, inspection and reassembly of each
component group have been indicated in the preceding
chapter. Before reassembly, make sure, again, that all
component groups are assembled correctly.
If something wrong is found in a certain component group
during assembly, inspect and repair this group immediately.
GENERAL ASSEMBLY NOTES:
1. The automatic transmission is composed of highly
precision–finished parts, necessitating careful inspection
before assembly because even a small nick could cause
fluid leakage or affect performance.
2. Before assembling new clutch discs and brake bands, soak
them in automatic transmission fluid for at least thir ty
minutes.
3. Apply automatic transmission fluid on the sliding or rotating
surfaces of parts before assembly.
4. Use petroleum jelly to keep small par ts in their places.
5. Do not use adhesive cements on gaskets and similar parts.
6. When assembling the transmission, be sure to use new
gaskets and O–rings.
7. Dry all par ts with compressed air - never use shop rags.
8.Be sure to install the thrust bearings and races in the
correct direction and position.
TRANSMISSION CONTROL SYSTEM (4L30–E)7A1–1
TRANSMISSION
TRANSMISSION CONTROL SYSTEM (4L30–E)
CONTENTS
Service Precaution 7A1–2. . . . . . . . . . . . . . . . . . . . . .
General Description 7A1–2. . . . . . . . . . . . . . . . . . . . .
Electronic Control Diagram 7A1–3. . . . . . . . . . . . .
Powertrain Control Module (PCM) 7A1–4. . . . . . .
Control System Diagram 7A1–5. . . . . . . . . . . . . . .
Shift Control 7A1–6. . . . . . . . . . . . . . . . . . . . . . . . . .
Band Apply Control 7A1–6. . . . . . . . . . . . . . . . . . . .
Torque Converter Clutch Control 7A1–6. . . . . . . . .
Line Pressure Control 7A1–6. . . . . . . . . . . . . . . . . .
On–Board Diagnostic System 7A1–6. . . . . . . . . . .
Fail Safe Mechanism 7A1–6. . . . . . . . . . . . . . . . . . .
Torque Management Control 7A1–6. . . . . . . . . . . .
ATF Warning Control 7A1–6. . . . . . . . . . . . . . . . . . .
ABS Control (If equipped) 7A1–6. . . . . . . . . . . . . .
Shift Mode Control 7A1–7. . . . . . . . . . . . . . . . . . . . .
Gear Shift Control 7A1–8. . . . . . . . . . . . . . . . . . . . .
Winter Drive Mode 7A1–9. . . . . . . . . . . . . . . . . . . . .
Backup Mode 7A1–9. . . . . . . . . . . . . . . . . . . . . . . . .
Functions of Input / Output Components 7A1–10. .
Diagnosis 7A1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Diagnosis 7A1–11. . . . . . . . . . . . . . . . . . .
Check Trans Indicator 7A1–11. . . . . . . . . . . . . . . . . .
Diagnostic Check 7A1–11. . . . . . . . . . . . . . . . . . . . . .
“Check Trans” Check 7A1–12. . . . . . . . . . . . . . . . . .
Tech2 OBD II Connection 7A1–13. . . . . . . . . . . . . . .
F0: Transmission Data 7A1–18. . . . . . . . . . . . . . . . .
F1: PC Solenoid Data 7A1–19. . . . . . . . . . . . . . . . . .
OBD II Diagnostic Management System 7A1–20. .
16 – Terminal Data Link Connector (DLC) 7A1–21.
Malfunction Indicator Lamp (MIL) 7A1–22. . . . . . . .
Types Of Diagnostic Trouble Codes (DTCs) 7A1–22
Clear DTC 7A1–22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC Check 7A1–23. . . . . . . . . . . . . . . . . . . . . . . . . . .
PCM Precaution 7A1–23. . . . . . . . . . . . . . . . . . . . . . .
Information On PCM 7A1–23. . . . . . . . . . . . . . . . . . .
Intermittent Conditions 7A1–23. . . . . . . . . . . . . . . . . Transmission And PCM Identification 7A1–24. . . . .
Isuzu Trooper 7A1–25. . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Code (DTC)
Identification 7A1–26. . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0218 Transmission Fluid Over
Temperature 7A1–27. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0560 System Voltage Malfunction 7A1–29. . .
DTC P0705 Transmission Range Switch
(Mode Switch) Illegal Position 7A1–32. . . . . . . . . . . .
DTC P0706 Transmission Range Switch
(Mode Switch) Performance 7A1–35. . . . . . . . . . . . . .
DTC P0712 Transmission Fluid Temperature
(TFT) Sensor Circuit Low Input 7A1–38. . . . . . . . . . .
DTC P0713 Transmission Fluid Temperature
(TFT) Sensor Circuit High Input 7A1–41. . . . . . . . . . .
DTC P0719 TCC Brake Switch Circuit High
(Stuck On) 7A1–44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0722 Transmission Output Speed
Sensor (OSS) Low Input 7A1–47
. . . . . . . . . . . . . . . . .
DTC P0723 Transmission Output Speed
Sensor (OSS) Intermittent 7A1–50. . . . . . . . . . . . . . .
DTC P0730 Transmission Incorrect Gear
Ratio 7A1–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0748 Pressure Control Solenoid
(PCS) (Force Motor) Circuit Electrical 7A1–56. . . . .
DTC P0753 Shift Solenoid A Electrical 7A1–58. . . . .
DTC P0758 Shift Solenoid B Electrical 7A1–61. . . . .
DTC P1790 ROM Transmission Side Bad
Check Sum 7A1–65. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1792 EEPROM Transmission Side
Bad Check Sum 7A1–66. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1835 Kickdown Switch Always On 7A1–67. . .
DTC P1850 Brake Band Apply Solenoid
Malfunction 7A1–69. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1860 TCC Solenoid Electrical 7A1–73. . . . . . .
Transmission Fluid Temperature (TFT)
Sensor Specifications 7A1–76. . . . . . . . . . . . . . . . . . .
