Toyota Corolla Quiz
Diagnostics

Inspection procedure

In this manual: Diagnostics
Introduction — 31Preparation — 32Service specifications — 19Diagnostics — 497Engine control system — 6Fuel — 13Emission control — 28Exhaust — 3Cooling — 13Lubrication — 7Ignition — 3Starting & charging — 13Front suspension — 12Rear suspension — 9Tire & wheel — 1Drive shaft / propeller shaft — 15Brake — 42Automatic transmission / trans — 47Clutch — 19Steering column — 9Power steering — 11Heater & air conditioner — 20Supplemental restraint system — 27Seat belt — 12Lighting — 18Wiper & washer — 9Audio & visual — 12Wiring — 1Communication system — 1Windshield/windowglass/mirror — 31Seat — 10Theft deterrent & door lock — 10Sliding roof/convertible — 8Engine hood/door — 12Exterior/interior trim — 20Vehicle control system — 1Cruise control — 5Maintenance — 8
9steps
~54min
2/5difficulty
Done 0 of 9
1 Check operation(overdrive)
  1. Drive the vehicle after the engine warms up.
  2. check that overdrive on e off occurs by an operation of the o/d switch on–off.
    2 Inspect terminal voltage(od)
2 Inspect terminal voltage(od)
Toyota Corolla. Inspect terminal voltage
  1. Remove the cruise control ecu assy with the connector still connected.
  2. turn the ignition switch to on.
  3. disconnect the cruise control ecu assy connector.
  4. measure voltage between terminal 14 (od) of harness side connector of cruise control ecu assy and body ground.

    Ok: voltage: 10 – 14 v

    3 Inspect terminal voltage(ect)
3 Inspect terminal voltage(ect)
Toyota Corolla. Inspect terminal voltage
  1. Connect the cruise control ecu assy connector.
  2. perform the test drive after engine warms up.
  3. check voltage between terminal 6 (ect) of cruise control ecu assy connector and body ground when o/d switch is on and off.

    Ok:

    4 Check harness and connector(between cruise control ecu assy
4 Check harness and connector(between cruise control ecu assy and electronically controlled transmission solenoid)
  1. Check for open and short circuit in harness and connector between cruise control ecu assy and electronically controlled transmission solenoid
Check and replace cruise control ecu assy
Check and replace cruise control ecu assy 5 Check harness and connector(between cruise control ecu assy and ecm)
  1. Check for open and short circuit in harness and connector between cruise control ecu assy and ecm
Check and replace cruise control ecu assy
Check and replace cruise control ecu assy

Test yourself

A quick Toyota Corolla quiz: every answer comes with an explanation and a link to the manual page.