Toyota Tacoma manuals

Toyota Corolla Repair Manual: Malfunction in speedometer

Wiring diagram

Inspection procedure

Inspection procedure

1 Check combination meter assy

  1. Remove the combination meter assy with connector still connected.
  2.  check voltage.
  1.  Jack up either of the front wheels.
  2.  Shift the shift lever to neutral.
  3.  Turn the ignition switch to on.
  4.  Measure the voltage between terminals c99 of combination meter assy and body ground when front wheel is turning slowly.

Standard voltage: voltage is generated intermittently.

Result:

Result:

Check and replace combination meter assy

Check and replace combination meter assy

2 Check obd ii scan tool or handheld tester

  1. Check output value of skid control ecu.
  1.  Connect the handheld tester to dlc3.
  2.  Turn the ignition switch to on and push the handheld tester main switch on.
  3.  Select the data list mode on the handheld tester.
  4.  Check that there is no difference between the speed value output from the speed sensor displayed by the handheld tester and the speed value displayed by the speedometer when driving the vehicle.

    Ok: there is almost no difference from the displayed speed value.

Repair or replace harness or connector

Repair or replace harness or connector

3 Inspect speedometer sensor

  1. Check voltage.
  1.  Shift the shift lever to neutral.
  2.  Jack up either of the front wheel.
  3.  Turn the ignition switch to on.
  4.  Measure voltage between terminals 3 and 2 of speed sensor when the front wheel is turning slowly.

Standard voltage: voltage is generated intermittently.

Repair or replace harness or connector

Repair or replace harness or connector

Entire combination meter does not operate
Wiring diagram Inspection procedere 1 Check fuse Check that continuity exists of dome fuse.  check that continuity exists of gauge fuse.  check that continuity exists of am1 fu ...

Malfunction in tachometer
Wiring diagram Inspection procedure Check output value of ecm.  Connect the handheld tester to dlc3. Turn the ignition switch to on and push the handheld tester main switch ...

Other materials:

Malfunction in tachometer
Wiring diagram Inspection procedure Check output value of ecm.  Connect the handheld tester to dlc3. Turn the ignition switch to on and push the handheld tester main switch on.  Select the data list mode on the handheld tester. 2 Inspect combination mete ...

Circuit description
The intake air temperature (iat) sensor, mounted on the mass air flow (maf) sensor, monitors the intake air temperature. The iat sensor has a thermistor that varies its resistance depending on the temperature of the intake air. When the air temperature is low, the resistance in the thermisto ...

How to proceed with troubleshooting
1 Vehicle brought to workshop 2 Customer problem analysis 3 Problem symptom confirmation 4 Circuit inspection 5 Repair or replace 6 Confirmation test 7 End Customer problem analysis check ...

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