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Automatic Transmission - 4L60-E/4L65-E (Diagnosis): Overview Chevrolet TrailBlazer I

Automatic Trans 162 illustrations ~3425 words

Scheme 239

Scheme 239: Transmission Fluid Temperature (TFT) Sensor Specifications
Scheme 239: Transmission Fluid Temperature (TFT) Sensor Specifications

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step determines if the scan tool is receiving power through the DLC connector.
  2. The MIL should illuminate whenever the ignition is ON and the engine is not running.
  3. This step determines if the PCM is transmitting class 2 serial data to the DLC and that the class 2 data circuit is not open or shorted.
  4. This step determines if a DTC is current or stored in history.

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Scheme 242

Scheme 242: Scan Tool Output Controls
Scheme 242: Scan Tool Output Controls

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Scheme 245

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step inspects for air flow restrictions or damage which may result from the transmission overheating.

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Scheme 247

Scheme 247: DTC P0218 (5.3L): Transmission Fluid Overtemperature
Scheme 247: DTC P0218 (5.3L): Transmission Fluid Overtemperature

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step inspects for air flow restrictions or damage which may result in the transmission overheating.

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Scheme 250

Scheme 250: DTC P0502 (4.2L): Vehicle Speed Sensor (VSS) Circuit Low Input
Scheme 250: DTC P0502 (4.2L): Vehicle Speed Sensor (VSS) Circuit Low Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the VSS assembly circuit.
  2. 4. This step tests the integrity of the VSS assembly.

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Scheme 253

Scheme 253: DTC P0502 (5.3L): Vehicle Speed Sensor (VSS) Circuit Low Input
Scheme 253: DTC P0502 (5.3L): Vehicle Speed Sensor (VSS) Circuit Low Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the VSS assembly circuit.
  2. 4. This step tests the integrity of the VSS assembly.

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Scheme 254

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Scheme 256

Scheme 256: DTC P0503 (4.2L): Vehicle Speed Sensor (VSS) Circuit Intermittent
Scheme 256: DTC P0503 (4.2L): Vehicle Speed Sensor (VSS) Circuit Intermittent

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the VSS assembly circuit.
  2. 4. This step tests the integrity of the VSS assembly.

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Scheme 259

Scheme 259: DTC P0503 (5.3L): Vehicle Speed Sensor (VSS) Circuit Intermittent
Scheme 259: DTC P0503 (5.3L): Vehicle Speed Sensor (VSS) Circuit Intermittent

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the VSS assembly circuit.
  2. 4. This step tests the integrity of the VSS assembly.

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Scheme 262

Scheme 262: DTC P0705 (4.2L): Transmission Range (TR) Switch Circuit
Scheme 262: DTC P0705 (4.2L): Transmission Range (TR) Switch Circuit

The numbers below refer to the step numbers on the diagnostic table.

  1. 5. By disconnecting the TR switch, the ground path of all TR switch circuits would be removed and the PCM would recognize all circuits as open. The scan tool will display HI for all range signals.
  2. 6. This step tests TR switch wiring for an open or the lack of the signal voltage from the PCM.
  3. 7. This step tests TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal A should change to LOW.
  4. 8. This step tests TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal B should change to LOW.
  5. 9. This step tests TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal C should change to LOW.

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Scheme 265

Scheme 265: DTC P0706 (5.3L): Transmission Range (TR) Switch Circuit
Scheme 265: DTC P0706 (5.3L): Transmission Range (TR) Switch Circuit

The numbers below refer to the step numbers on the diagnostic table.

  1. 5. By disconnecting the transmission range switch, the ground path of all TR switch circuits would be removed and the PCM would recognize all circuits as open. The scan tool will display HI for all range signals.
  2. 6. This step tests TR switch wiring for an open or the lack of the signal voltage from the PCM.
  3. 7. This step tests TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal A should change to LOW.
  4. 8. This step tests TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal B should change to LOW.
  5. 9. This step tests TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal C should change to LOW.

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Scheme 268

Scheme 268: DTC P0711 (4.2L): TFT Sensor Circuit Range/Performance
Scheme 268: DTC P0711 (4.2L): TFT Sensor Circuit Range/Performance

The numbers below refer to the step numbers on the diagnostic table.

  1. 5. This step tests for an intermittent short or open condition in the engine wiring harness. The test lamp is used as a resistor in the circuit.
  2. 6. This step determines if the PCM or the TFT sensor is causing a steady, unchanging TFT reading.

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Scheme 271

Scheme 271: DTC P0711 (5.3L): TFT Sensor Circuit Range/Performance
Scheme 271: DTC P0711 (5.3L): TFT Sensor Circuit Range/Performance

The numbers below refer to the step numbers on the diagnostic table.

  1. 5. This step tests for an intermittent short or open condition in the engine wiring harness. The test lamp is used as a resistor in the circuit.
  2. 6. This step determines if the PCM or the TFT sensor is causing a steady, unchanging TFT reading.

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Scheme 274

Scheme 274: DTC P0712 (4.2L): Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
Scheme 274: DTC P0712 (4.2L): Transmission Fluid Temperature (TFT) Sensor Circuit Low Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests for a short to ground condition.
  2. 4. This step tests for an internal fault within the transmission by creating an open.

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Scheme 277

Scheme 277: DTC P0712 (5.3L): Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
Scheme 277: DTC P0712 (5.3L): Transmission Fluid Temperature (TFT) Sensor Circuit Low Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests for a short to ground condition.
  2. 4. This step tests for an internal fault within the transmission by creating an open.

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Scheme 280

Scheme 280: DTC P0713 (4.2L): Transmission Fluid Temperature (TFT) Sensor Circuit High Input
Scheme 280: DTC P0713 (4.2L): Transmission Fluid Temperature (TFT) Sensor Circuit High Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step verifies a condition in the TFT sensor circuit.
  2. 4. This step simulates a TFT sensor DTC P0712. If the PCM recognizes low signal voltage, high temperature, the PCM and wiring are functioning normally.
  3. 5. This step tests the TFT sensor and automatic transmission (AT) wiring harness assembly.

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Scheme 283

Scheme 283: DTC P0713 (5.3L): Transmission Fluid Temperature (TFT) Sensor Circuit High Input
Scheme 283: DTC P0713 (5.3L): Transmission Fluid Temperature (TFT) Sensor Circuit High Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step verifies a condition in the TFT sensor circuit.
  2. 4. This step simulates a TFT sensor DTC P0712. If the PCM recognizes low signal voltage, high temperature, the PCM and wiring are functioning normally.
  3. 5. This step tests the TFT sensor and automatic transmission (AT) wiring harness assembly.

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Scheme 286

Scheme 286: DTC P0719 (4.2L): Brake Switch Circuit Low Input
Scheme 286: DTC P0719 (4.2L): Brake Switch Circuit Low Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step isolates the brake switch as a source for setting the DTC.

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Scheme 289

Scheme 289: DTC P0719 (5.3L): Brake Switch Circuit Low Input
Scheme 289: DTC P0719 (5.3L): Brake Switch Circuit Low Input

The number below refers to the step number on the diagnostic table.

  1. 3. This step isolates the brake switch as a source for setting the DTC.

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Scheme 292

Scheme 292: DTC P0724 (4.2L): Brake Switch Circuit High Input
Scheme 292: DTC P0724 (4.2L): Brake Switch Circuit High Input

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step isolates the brake switch as a source for setting the DTC.

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Scheme 294

Scheme 294: DTC P0724 (5.3L): Brake Switch Circuit High Input
Scheme 294: DTC P0724 (5.3L): Brake Switch Circuit High Input

The number below refers to the step number on the diagnostic table.

  1. 2. This step isolates the brake switch as a source for setting the DTC.

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Scheme 296

Scheme 296: DTC P0740 (4.2L): TCC Enable Solenoid Circuit Electrical
Scheme 296: DTC P0740 (4.2L): TCC Enable Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests for voltage to the solenoid.
  2. 5. This step tests the ability of the PCM and wiring to control the ground circuit.
  3. 7. This step tests the resistance of the TCC solenoid valve and the automatic transmission (AT) wiring harness assembly.

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Scheme 300

Scheme 300: DTC P0740 (5.3L): TCC Enable Solenoid Circuit Electrical
Scheme 300: DTC P0740 (5.3L): TCC Enable Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests for voltage to the solenoid.
  2. 5. This step tests the ability of the PCM and wiring to control the ground circuit.
  3. 7. This step tests the resistance of the TCC solenoid valve and the automatic transmission (AT) wiring harness assembly.

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Scheme 304

Scheme 304: DTC P0741 (4.2L): Torque Converter Clutch (TCC) System-Stuck Off
Scheme 304: DTC P0741 (4.2L): Torque Converter Clutch (TCC) System-Stuck Off

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step inspects for excessive TCC slip when the TCC is commanded ON.
  2. 3. This step inspects for possible causes of no TCC apply.

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Scheme 306

Scheme 306: DTC P0741 (5.3L): Torque Converter Clutch (TCC) System-Stuck Off
Scheme 306: DTC P0741 (5.3L): Torque Converter Clutch (TCC) System-Stuck Off

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step inspects for excessive TCC slip when the TCC is commanded ON.
  2. 3. This step inspects for possible causes of no TCC apply.

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Scheme 308

Scheme 308: DTC P0742 (4.2L): TCC System Stuck On
Scheme 308: DTC P0742 (4.2L): TCC System Stuck On

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests the hydraulic state of the TCC. When the PCM commands the TCC solenoid valve OFF, the slip speed should increase.

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Scheme 310

Scheme 310: DTC P0742 (5.3L): TCC System Stuck On
Scheme 310: DTC P0742 (5.3L): TCC System Stuck On

The number below refers to the step number on the diagnostic table.

  1. 2. This step tests the hydraulic state of the TCC. When the PCM commands the TCC solenoid valve OFF, the slip speed should increase.

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Scheme 312

Scheme 312: DTC P0748 (4.2L): Pressure Control Solenoid Circuit Electrical
Scheme 312: DTC P0748 (4.2L): Pressure Control Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests the ability of the PCM to command the PC solenoid valve.
  2. 3. This step tests the PC solenoid valve and automatic transmission (AT) wiring harness assembly for incorrect resistance.

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Scheme 316

Scheme 316: DTC P0748 (5.3L): Pressure Control Solenoid Circuit Electrical
Scheme 316: DTC P0748 (5.3L): Pressure Control Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests the ability of the PCM to command the PC solenoid valve.
  2. 3. This step tests the PC solenoid valve and automatic transmission wiring harness assembly for incorrect resistance.

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Scheme 320

Scheme 320: DTC P0751 (4.2L): 1-2 Shift Solenoid Valve Performance
Scheme 320: DTC P0751 (4.2L): 1-2 Shift Solenoid Valve Performance

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

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Scheme 322

Scheme 322: DTC P0751 (5.3L): 1-2 Shift Solenoid Valve Performance
Scheme 322: DTC P0751 (5.3L): 1-2 Shift Solenoid Valve Performance

The number below refers to the step number on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

Scheme 323

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Scheme 324

Scheme 324: DTC P0752 (4.2L): 1-2 Shift Solenoid (SS) Valve Performance - No Second Or Third Gear
Scheme 324: DTC P0752 (4.2L): 1-2 Shift Solenoid (SS) Valve Performance - No Second Or Third Gear

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

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Scheme 326: DTC P0752 (5.3L): 1-2 Shift Solenoid (SS) Valve Performance - No Second Or Third Gear
Scheme 326: DTC P0752 (5.3L): 1-2 Shift Solenoid (SS) Valve Performance - No Second Or Third Gear

The number below refers to the step number on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

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Scheme 328

Scheme 328: DTC P0753 (4.2L): 1-2 Shift Solenoid Circuit Electrical
Scheme 328: DTC P0753 (4.2L): 1-2 Shift Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests the function of the 1-2 SS valve and the automatic transmission (AT) wiring harness assembly.
  2. 5. This step tests for power to the 1-2 SS valve from the ignition through the fuse.
  3. 6. This step tests the ability of the PCM and of the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the AT wiring harness assembly and of the 1-2 SS valve.

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Scheme 332

Scheme 332: DTC P0753 (5.3L): 1-2 Shift Solenoid Circuit Electrical
Scheme 332: DTC P0753 (5.3L): 1-2 Shift Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests the function of the 1-2 SS valve and the automatic transmission (AT) wiring harness assembly.
  2. 5. This step tests for power to the 1-2 SS valve from the ignition through the fuse.
  3. 6. This step tests the ability of the PCM and of the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the AT wiring harness assembly and of the 1-2 SS valve.

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Scheme 336

Scheme 336: DTC P0756 (4.2L): 2-3 Shift Solenoid Valve Performance
Scheme 336: DTC P0756 (4.2L): 2-3 Shift Solenoid Valve Performance

The numbers below refer to the step numbers on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

Scheme 337

Scheme 337
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Scheme 338

Scheme 338: DTC P0756 (5.3L): 2-3 Shift Solenoid Valve Performance
Scheme 338: DTC P0756 (5.3L): 2-3 Shift Solenoid Valve Performance

The number below refers to the step number on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

Scheme 339

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Scheme 340

Scheme 340: DTC P0757 (4.2L): 2-3 Shift Solenoid (SS) Valve Performance - No Third Or Fourth Gear
Scheme 340: DTC P0757 (4.2L): 2-3 Shift Solenoid (SS) Valve Performance - No Third Or Fourth Gear

The number below refers to the step number on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

Scheme 341

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Scheme 342

Scheme 342: DTC P0757 (5.3L): 2-3 Shift Solenoid (SS) Valve Performance - No Third Or Fourth Gear
Scheme 342: DTC P0757 (5.3L): 2-3 Shift Solenoid (SS) Valve Performance - No Third Or Fourth Gear

The number below refers to the step number on the diagnostic table.

  1. 2. This step tests that the PCM commanded all shifts, that all shift solenoid valves responded correctly, but that all the shifts did not occur.

Scheme 343

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Scheme 344

Scheme 344: DTC P0758 (4.2L): 2-3 Shift Solenoid Circuit Electrical
Scheme 344: DTC P0758 (4.2L): 2-3 Shift Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests the function of the 2-3 SS valve and the automatic transmission (AT) wiring harness assembly.
  2. 5. This step tests for power to the 2-3 SS valve from the ignition through the fuse.
  3. 6. This step tests the ability of the PCM and of the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the AT wiring harness assembly and of the 2-3 SS valve.

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Scheme 348

Scheme 348: DTC P0758 (5.3L): 2-3 Shift Solenoid Circuit Electrical
Scheme 348: DTC P0758 (5.3L): 2-3 Shift Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests the function of the 2-3 SS valve and the automatic transmission (AT) wiring harness assembly.
  2. 5. This step tests for power to the 2-3 SS valve from the ignition through the fuse.
  3. 6. This step tests the ability of the PCM and of the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the AT wiring harness assembly and of the 2-3 SS valve.

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Scheme 352

Scheme 352: DTC P0785 (4.2L): 3-2 Shift Solenoid Circuit Electrical
Scheme 352: DTC P0785 (4.2L): 3-2 Shift Solenoid Circuit Electrical

The item numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests the ability of the PCM to control the solenoid.
  2. 5. This step tests for voltage to the solenoid.
  3. 6. This step tests the ability of the PCM and the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the automatic transmission (AT) wiring harness assembly and the 3-2 SS valve assembly.

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Scheme 356: DTC P0785 (5.3L): 3-2 Shift Solenoid Circuit Electrical
Scheme 356: DTC P0785 (5.3L): 3-2 Shift Solenoid Circuit Electrical

The item numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests the ability of the PCM to control the solenoid.
  2. 5. This step tests for voltage to the solenoid.
  3. 6. This step tests the ability of the PCM and the wiring to control the ground circuit.
  4. 8. This step measures the resistance of the automatic transmission wiring harness assembly and the 3-2 SS valve assembly.

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Scheme 360

Scheme 360: DTC P0894 (5.3L): Transmission Component Slipping
Scheme 360: DTC P0894 (5.3L): Transmission Component Slipping

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the torque converter for slippage while in a commanded lock-up state.

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Scheme 365

Scheme 365: DTC P1810 (4.2L): TFP Valve Position Switch Circuit
Scheme 365: DTC P1810 (4.2L): TFP Valve Position Switch Circuit

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step compares the indicated range signal to the selected manual valve position.
  2. 5. This step tests for correct voltage from the PCM to the AT inline 20-way connector.

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Scheme 369

Scheme 369: DTC P1810 (5.3L): TFP Valve Position Switch Circuit
Scheme 369: DTC P1810 (5.3L): TFP Valve Position Switch Circuit

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step compares the indicated range signal to the selected manual valve position.
  2. 5. This step tests for correct voltage from the PCM to the AT inline 20-way connector.

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Scheme 373

Scheme 373: DTC P1860 (4.2L): TCC PWM Solenoid Circuit Electrical
Scheme 373: DTC P1860 (4.2L): TCC PWM Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests for voltage to the solenoid.
  2. 5. This step tests the ability of the PCM and wiring to control the ground circuit.
  3. 7. This step tests the resistance of the TCC PWM solenoid valve and the automatic transmission (AT) wiring harness assembly.

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Scheme 377

Scheme 377: DTC P1860 (5.3L): TCC PWM Solenoid Circuit Electrical
Scheme 377: DTC P1860 (5.3L): TCC PWM Solenoid Circuit Electrical

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. This step tests for voltage to the solenoid.
  2. 5. This step tests the ability of the PCM and wiring to control the ground circuit.
  3. 7. This step tests the resistance of the TCC PWM solenoid valve and the automatic transmission (AT) wiring harness assembly.

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Scheme 381

Scheme 381: DTC P1870 (4.2L)
Scheme 381: DTC P1870 (4.2L)

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the torque converter for slippage while in a commanded lock-up state.

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Scheme 386: DTC P1875 (5.3L)
Scheme 386: DTC P1875 (5.3L)

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests for a short to ground in the 4WD low signal circuit (CKT 1694).
  2. 4. This step tests for an open in the 4WD low signal circuit (CKT 1694) or a faulty transfer case control module, active transfer case vehicles, or transfer case switch, non-active transfer case vehicles.

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Scheme 389

Scheme 389: Symptoms - Automatic Transmission
Scheme 389: Symptoms - Automatic Transmission

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Scheme 391

Scheme 391: Range Selector Displays Incorrect Range (4.2L)
Scheme 391: Range Selector Displays Incorrect Range (4.2L)

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. By disconnecting the TR switch, the ground path of all TR switch circuits is removed and the PCM should recognize all circuits as open. The scan tool should display HI for all range signal states.
  2. 5. This step tests the TR switch wiring for an open or the lack of the signal voltage from the PCM.
  3. 6. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.
  4. 7. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.
  5. 8. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.
  6. 9. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.

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Scheme 394

Scheme 394: Range Selector Displays Incorrect Range (5.3L)
Scheme 394: Range Selector Displays Incorrect Range (5.3L)

The numbers below refer to the step numbers on the diagnostic table.

  1. 4. By disconnecting the TR switch, the ground path of all TR switch circuits is removed and the PCM should recognize all circuits as open. The scan tool should display HI for all range signal states.
  2. 5. This step tests the TR switch wiring for an open or the lack of the signal voltage from the PCM.
  3. 6. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.
  4. 7. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.
  5. 8. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.
  6. 9. This step tests the TR switch wiring and the PCM by providing a ground path through a fused jumper wire. When grounded, the scan tool range signal states should change to LOW.

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Scheme 396

Transmission Abbreviations

A/C: Air Conditioning

AC: Alternating Current

AT: Automatic Transmission

CCDIC: Climate Control Driver Information Center

DC: Direct Current

DIC: Driver Information Center

DLC: Diagnostic Link Connector

DMM: Digital Multimeter

DTC: Diagnostic Trouble Code

ECT: Engine Coolant Temperature

EMI: Electromagnetic Interference

IAT: Intake Air Temperature

IGN: Ignition

MAP: Manifold Absolute Pressure

MIL: Malfunction Indicator Lamp

NC: Normally Closed

NO: Normally Open

OBD: On Board Diagnostic

OSS: Output (Shaft) Speed Sensor

PC: Pressure Control

PCM: Powertrain Control Module

PWM: Pulse Width Modulation

RPM: Revolutions Per Minute

SS: Shift Solenoid

TAP: Transmission Adaptive Pressure

TCC: Torque Converter Clutch

TFP: Transmission Fluid Pressure

TFT: Transmission Fluid Temperature

TP: Throttle Position

TV: Throttle Valve

VSS: Vehicle Speed Sensor

WOT: Wide Open Throttle

4WD: Four-Wheel Drive

Scheme 397

Scheme 397: Transmission Identification Information
Scheme 397: Transmission Identification Information

Scheme 398

Scheme 398
Scheme 398

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Scheme 399
Scheme 399

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Scheme 400

Transmission Component and System Description

The mechanical components of the 4L60-E are as follows

  1. Torque converter assembly
  2. Servo assembly and 2-4 band assembly
  3. Reverse input clutch and housing
  4. Overrun clutch
  5. Forward clutch
  6. 3-4 clutch
  7. Forward sprag clutch assembly
  8. Lo and reverse roller clutch assembly
  9. Lo and reverse clutch assembly
  10. Two planetary gear sets: Input and Reaction
  11. Oil pump assembly
  12. Control valve body assembly

The electrical components of the 4L60-E are as follows

  1. 1-2 and 2-3 shift solenoid valves
  2. 3-2 shift solenoid valve assembly
  3. Transmission pressure control (PC) solenoid
  4. Torque converter clutch (TCC) solenoid valve
  5. TCC pulse width modulation (PWM) solenoid valve
  6. Automatic transmission fluid pressure (TFP) manual valve position switch
  7. Automatic transmission fluid temperature (TFT) sensor
  8. Vehicle speed sensor assembly

For more information, refer to Electronic Component Description .

More articles — Automatic Transmission - 4L60-E/4L65-E (Diagnosis)