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Toyota Corolla Repair Manual: Malfunction in tachometer

Wiring diagram

Inspection procedure

Inspection procedure

  1. Check output value of ecm.
  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.

2 Inspect combination meter assy

2 Inspect combination meter assy

(Reference) inspection using oscilloscope

(Reference) inspection using oscilloscope

  1.  check the input signal waveform.
  1.  Remove the combination meter assy with connectors still connected.
  2.  Connect the oscilloscope to the terminals c919 of combination meter assy and body ground.
  3.  Start engine.
  4.  Check the signal waveform.

3 Check harness and connector(between ecm and combination

3 Check harness and connector(between ecm and combination meter assy)

  1. Remove the combination meter.
  2.  check the continuity between terminals 5 (tach) of ecm and c919 of combination meter connector.

Standard: there is continuity.

Check and replace ecm

Check and replace ecm

Malfunction in speedometer
Wiring diagram Inspection procedure 1 Check combination meter assy Remove the combination meter assy with connector still connected.  check voltage.  Jack up either o ...

Malfunction in fuel receiver gauge
Wiring diagram Inspection procedere 1 Inspect fuel sender gage assy Disconnect the connector fuel sender gauge. check the float position between e and f and measure the resistance betw ...

Other materials:

Contact/Call History Settings
The contact can be transferred from a Bluetooth phone to the system. The contact also can be added, edited and deleted. The call history can be deleted and contact and favorites can be changed. 1 Display the Phone/Message Settings screen. 2 Select Contact/Call History Settings. 3 Select t ...

Starting the engine
1 Check that the parking brake is set. ► Vehicles without a multi-information display 2 Continuously variable transmission: Check that the shift lever is set in P. Firmly depress the brake pedal. Manual transmission: Check that the shift lever is set in N. Firmly depress the clutch peda ...

Inspection
1. Cooling fan relay Inspect the cooling fan relay continuity.  Using an ohmmeter, check that there is continuity between terminals 1 and 2. If there is no continuity, replace the relay.  Check that there is no continuity between terminals 3 and 5. If there is conti ...

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