Chapter 13
Troubleshooting Mechanical, Hydraulic,
and Electrical Problems. . . . . . . . . . . . . 309
The Seven-Step Troubleshooting Process 310
Step 1—Determine the Exact Nature of the Complaint /
Step 2—Check for Obvious Causes / Step 3—
Determine Which Component or System Is the Most
Probable Cause of the Problem / Step 4—Perform
Pinpoint Tests / Step 5— Check for Related Problems /
Step 6—Correct the Defect / Step 7—Recheck
System Operation / The Importance of Follow-Up
Automatic Transmission and Transaxle Problems 314
Slippage / No-Drive Condition / Shift Problems /
Abnormal Noise / Overheating / Lubricant Leakage /
Water Damage /
Automatic Transmission and Transaxle Component
Malfunctions 318
Flywheel Malfunction / Torque Converter
Malfunction / Shaft Defects / Planetary Gearset
Defects / Clutch Pack Malfunction / Band and Servo
Malfunctions / Overrunning Clutch Malfunction /
Oil Pump Malfunction / Oil Filter Malfunction / Oil
Cooler Malfunction / Valve Body Malfunction /
Vacuum Modulator Malfunction / Governor Valve
Malfunction / Automatic Transmission Linkage
Malfunctions / Parking Pawl Malfunction / Bearing
and Thrust Washer Malfunctions / Front Pump Seal
and Output Shaft Seal Malfunctions / Other Seal
and Gasket Malfunctions
Noise, Vibration, and Harshness (NVH)
Diagnosis 323
Automatic Transmission Diagnostic Charts 324
Diagnostic Testing 325
Road Test / Hydraulic Pressure Tests / Stall Test /
Testing Oil Cooler Flow / Air Pressure Tests
Using Hydraulic Circuit Diagrams to
Troubleshoot 331
Electrical Problem Diagnosis 332
Detent System Diagnosis / Converter Clutch System
Diagnosis
Chapter 14
Troubleshooting Electronic Control System
Problems . . . . . . . . . . . . . . . . . . . . . . . 339
Electronic Transmission and Transaxle
Problems 340
Limp-In Mode / Input Sensor Problems / Solenoid
Problems / ECM Problems / Wiring and Connector
Problems / Battery Voltage and Computer System
Operation
The Seven-Step Troubleshooting Process 343
Is the Trouble in the Electronic Control
System? 344
Basic Electrical Checks 344
OBD II Computer Control Systems
Using Scan Tools 345
Trouble Codes / Other Scan Tool Functions
Checking System and Component Operation 346
Test Equipment / System Operation Testing /
Component Testing / Testing Manual Valve Position
Sensors / Testing Throttle Position Sensors /
Checking Speed Sensors / Testing Pressure Sensors /
Testing Temperature Sensors / Checking Manifold
Air Pressure (MAP) Sensors / Checking Mass Airflow
(MAF) Sensors / Testing Oxygen Sensors / Testing
Output Solenoids / Checking Electric Motors /
Checking Wiring / Testing the ECM
Deciding on Work Needed 360
Chapter 15
Transmission and Transaxle In-Vehicle
Service. . . . . . . . . . . . . . . . . . . . . . . . . . 363
Checking Fluid Level and Condition 364
Automatic Transmission and Transaxle
Adjustments 365
Shift Linkage Adjustment / Throttle, TV, and
Kickdown Linkage Adjustments / Electric Detent
Switch Adjustment / Transmission Band Adjustment /
Neutral Start Switch Adjustment
Ordering Transmission and Transaxle Parts 369
Determining the Transmission Type / Identifying
Defective Parts / Using Parts Catalogs / Ordering from
a Parts Supplier / Check Parts When They Arrive
Changing Fluid and Filter 373
Governor Service 373
Vacuum Modulator Service 374
Valve Body Service 374
Shift Kits 375
Reinstalling the Valve Body 376
Servo Service 378
Accumulator Service 379
Replacing Leaking Seals, O-Rings, and Gaskets 380
Seal Replacement / O-Ring Replacement / Gasket
Replacement
Adding an Auxilliary Oil Cooler 381
Chapter 16
Transmission and Transaxle Removal and
Installation. . . . . . . . . . . . . . . . . . . . . . . 385
Commonly Overlooked Precautions 386
Automatic Transmission Removal 386
Automatic Transmission Installation 389
Automatic Transaxle Removal 391
Automatic Transaxle Installation 396
Aligning Engine and Drive Train Mounts 398
Checking for a Broken Mount / Adjusting Rear-
Wheel Drive Mounts / Checking Front-Wheel Drive
Engine Cradles and Brackets / Adjusting Front-
Wheel Drive Mounts
8