automatic transmission electrical
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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!!