manual transmission electrical
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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!!
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