How To Proceed With Troubleshooting - Toyota Corolla 2002 Repair Manual Supplement

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01 - - 22

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:
Perform troubleshooting in accordance with the procedures below. The following is an outline of basic trou -
bleshooting procedures. Details in the "Diagnostics" section show the most effective methods for each cir-
cuit. Confirm the troubleshooting procedures for the circuit you are working on before beginning trouble -
shooting.
1 VEHICLE BROUGHT TO WORKSHOP
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2 CUSTO MER PROBLEM ANALYSIS
(a) Ask the c ustomer about the c onditions and environment when the problem occurred.
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3 SYMPTOM CONFIRMATION AND DTC ( AND FREEZE FRAME DATA) CHECK
(a) Measure the battery positive voltage.
Standard: 11 to 14 V (Engine stopped)
(b) Visually check the wire harness, connectors and fuses for open and short circuits.
(c) Warm up the engine to the normal operating temperature.
(d) Confirm the problem symptoms and conditions, and check for DTCs.
Result:
Result
DTC is output
DTC is not output
A
4 DTC CHART
(a) Reconfirm the results obtained in step 3. Then confirm the circuit or part using the DTC chart.
5 PROBLEM SYMPTOMS CHART
(a) Reconfirm the results obtained in step 3. Then confirm the circuit or part using the problem symptoms
table.
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6 CIRCUIT INSPECTION OR PARTS INSPECTION
(a) Confirm the malfunctioning circuit or part.
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COROLLA Supplement (RM1129E)
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E
-- HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
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