AUTOMATIC TRANSMISSION ELECTRICAL

AUTOMATIC TRANSMISSION

ELECTRICAL

BASIC ELECTRICAL TERMS

CIRCUIT VOLTAGE (Use Voltmeter) CURRENT (Use Ammeter) RESISTANCE (Use Ohmmeter) LOAD POWER SOURCE

Transmission Shop Manual - Page 253

TYPES OF CIRCUITS

SERIES PARALLEL SERIES PARALLEL

Shop Manual - Page 255

TYPES OF CIRCUIT FAILURES

Opens Circuits Shorted Circuits Grounded Circuits Poor Connection (common to

transmission problems)

Shop Manual - Page 256

ELECTRICAL CONNECTIONS

Many different electrical connections• Must be clean and dry• Must be secure and tight• ATF will deteriorate connections• Wiring condition must be in good shape

ELECTRICAL CONTROLS

Switches• Controlled by Driver of Car• Mechanical Linkages• Predetermined Condition (Programmed)

– Hydraulically Controlled High or Low Pressure Normally Open / Normally Closed Insulated side of circuit Ground side of circuit

PRESSURE SWITCHES

Normally Open Single Contact Switch

Normally Open Dual Contact Switch• Apply Air to Test• Ohmmeter

NEUTRAL SAFETY SWITCH

Most Combination ( Back up and Neutral Safety Switch)

Electrical Operation and Circuit • Prevents Starter from engaging in gear

Testing and Adjusting• Can use Voltmeter or Ohmmeter

Trans Shop Manual - Pg 47

KICKDOWN SWITCH

Mechanical or Electrical Electrical

• To make transmission downshift on WOT• Located on Transmission or Remote• Testing and Adjustment

Shop Manual - Page 51

ELECTRICAL INPUTS

Sensors• Vary Electricity through circuit• Potentiometers (variable resistors

ELECTRICAL OUTPUTS

Solenoids• Change electrical

energy into Mechanical energy

• Control Shifting• Control Hydraulic

Pressure

Shop Manual - Page 270

ELECTRICAL OUTPUTS

RELAYS• Normally Open

Relay• Normally Closed

Relay• Single Contact• Double Contact

Shop Manual - Page 257

ELECTRONIC DEFAULTS

Faulty sensor signal will cause transmission to go into default mode

It will protect itself from destruction Testing for Electronic faults

• Scanners• Jumper Wires• Transmission Testers

Shop Manual - Page 54 and 283

ADAPTIVE STRATEGY(Computer Relearn)

Relearn after Repair (bat disconnected) Driveability Concerns Relearn Procedures

Shop Manual - Page 68-69

CIRCUIT BOARD Install a WHITE wire between 55 & 60. Install a RED wire between 57 & 167. Install a WHITE wire between 168 & 169. Install a GREEN wire between 170 & 58.

RK

AVAILABLE VOLTAGE

Place black lead of voltmeter on terminal 58 and red lead on terminal 57.

Black 58 - Red 167 Switch off Black 58 - Red 168 Switch off Black 58 - Red 169 Switch off Black 58 - Red 170 Switch offRecord Readings

RK

AVAILABLE VOLTAGE

Place black lead of voltmeter on terminal 58 and red lead on terminal 57.

Black 58 - Red 167 Switch on Black 58 - Red 168 Switch on Black 58 - Red 169 Switch on Black 58 - Red 170 Switch onRecord Readings

RK

See Ya Later Dudes!!