Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Combination meter / Malfunction in water temperature receiver gauge
Toyota Corolla (E120): Malfunction in water temperature receiver gauge
Wiring diagram
Inspection procedure
1 Read value of hand–held tester
- Check output value of ecm.
- Connect the hand–held tester to dlc3.
- Turn the ignition switch to on and push the hand–held tester main switch on.
- Select the data list mode on the hand–held tester.
2 Inspect combination meter assy
(Reference) inspection using oscilloscope
- check the input signal waveform.
- Remove the combination meter with connectors still connected.
- Connect the oscilloscope to the terminals c9–8 of combination meter assy and body ground.
- Start engine.
- Check the signal waveform.
3 Check harness and connector(between ecm and combination meter assy)
- Remove the combination meter.
- check the continuity between terminals 14 (thwo) of ecm and c9–8 of
combination meter connector.
Standard: there is continuity.
Check and replace ecm
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