Toyota Corolla Repair Manual: How to troubleshoot ecu controlled systems

Vehicle lift and support locations

1. Notice about vehicle condition when jacking up As a rule, the vehicle must be unloaded when jacking up. Never jack up or lift up the vehicle loaded with things of heavy weight.  whe ...

General information

There are many ecu controlled systems used in the corolla. In general, ecu controlled system are considered to be very intricate and require a high level of technical knowledge and expert skill t ...

Other materials:

How to proceed with troubleshooting
1 Vehicle brought to workshop 2 Customer problem analysis 3 Check and clear dtcs and freeze frame data 4 Problem symptom confirmation Symptom does not occur: go to step 5 Symptom occurs: go to step 6 5 Symptom simulation 6 Dtc check There is no output: go to step 7 There is outp ...

Inspection procedure
1 Check p squib circuit(airbag sensor assy center – instrument panel passenger airbag assy) Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connector between the airbag sensor assy center and the instrument panel pass ...

Replacement
Hint: components:  1. Remove front wheel 2. Remove front axle hub lh nut  sst 09930–00010 3. Separate front stabilizer link assy lh 4. Separate speed sensor front lh (w/ abs) 5. Separate front disc brake caliper assy lh Remove the 2 bolts, separate the brake caliper assy l ...