Toyota Tacoma manuals

Toyota Corolla Repair Manual: Check and replace ecu

Notice

: start an inspection of the connector from the backside of the connector on the wire harness side with the connector connected to the ecu.

When no measurement condition is specified, perform the inspection with the engine stopped and also the ignition switch on.

  1. First check the ecu ground circuit. If it is faulty, repair it.

    If it is normal, the ecu could be faulty. In this case, replace the ecu with one that functions normally and check if the symptoms appear.

  1.  Measure the resistance between the ecu ground terminal and body ground.

    Resistance: 1 Ω or less

  1. Disconnect the ecu connector, check the ground terminals on the ecu side and wire harness side for bends and check the contact pressure.

Terms

Check short circuit
If the wire harness is ground shorted as shown in fig. 5, Locate the section by conducting a resistance check with the body ground in step (b). Check the resistance with the body grou ...

Terms
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Other materials:

Registering and connecting from the Bluetooth* Setup screen
To display the screen shown below, press the SETUP button and select Bluetooth* on the Setup screen. 1 Select to connect the device to be used with multimedia system. 2 Select to register a Bluetooth device to be used with multimedia system. 3 Select to set detailed Bluetooth system ...

Replacement
1. Work for preventing gasoline from spilling out 2. Remove cylinder head cover no.2 Remove the 2 nuts, 2 clips and cylinder head cover. 3. Disconnect ventilation hose Disconnect the ventilation hose from the cylinder head cover. 4. Disconnect engine wire Disconnect ...

How to proceed with troubleshooting
Troubleshoot in accordance with the procedure on the following pages. 1 Vehicle brought to workshop 2 Customer problem analysis check and symptom check Without applicable symptoms, proceed to a.  with applicable symptoms, proceed to b. 3 Symptom simulation 4 Problem symp ...

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