MANUAL TRANSMISSION

ELECTRICAL

OBJECTIVES

Diagnose electrical problems by logic and symptom description.

Perform troubleshooting procedures using meters, test lights, and jumper wires.

Repair electrical wiring. Replace electrical connectors.

Page 369 Lab

OBJECTIVES

Locate, test,adjust, and replace electrical switches on a transmission.

Locate, test, and replace transmission related solenoids.

Test, and replace electromagnetic clutches.

Diagnose transmission -related electronic control circuits.

Page 369 Lab

BASIC ELECTRICAL TERMS

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

Shop Manual - Page 369

OHM GUYSOhm’s LawIt takes 1 voltto push 1 ampthrough 1 ohm of resistance.

TYPES OF CIRCUITS

SERIES PARALLEL SERIES PARALLEL

Shop Manual - Page 255

SIMPLE CIRCUIT Power source Conductors Load

May include• Circuit

protection• Circuit control

Class Manual - Page 209

TYPES OF CIRCUIT FAILURES

Opens Circuits Shorted Circuits Grounded Circuits Poor Connection (common to

transmission problems)

Shop Manual - Page 372

ELECTRICAL CONNECTIONS

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

Shop Manual - Page 372

PROTECTION DEVICES

Fuses• Cartridge• Blade• Ceramic

Fusible Links Maxi-Fuses Circuit Breakers

Shop Manual - Page 383

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

Shop Manual - Page 385

PRESSURE SWITCHES

Normally Open Single Contact Switch

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

NEUTRAL SAFETY SWITCH

Clutch Start Switch Electrical Operation and Circuit

• Prevents Starter from engaging in gear Backup Light Switch Testing and Adjusting

• Can use Voltmeter or Ohmmeter

Shop Manual - Page 385

SPEED SENSORS

Magnetic Pulse Generators Hall-effect switch Light Emitting Diode

Shop Manual - Page 389

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!!