01045–02
–
INTRODUCTION
HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
01–21
21
Author:
Date:
2002 CAMRY REPAIR MANUAL (RM881U)
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Carry out a troubleshooting in accordance with the procedure on the following page. Here, only the basic
procedure is shown. Details are provided in the Diagnostics section, showing the most effective methods
for each circuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning the trou-
bleshooting of that circuit.
1
Vehicle brought to workshop
2
Customer problem analysis
(a)
Ask the customer about the conditions and environment when the problem occurred.
3
Symptom confirmation and DTC (and freeze frame data) check
(a)
Check the battery positive voltage.
Voltage: 10 – 14 V (Engine stopped)
(b)
Visually check the wire harness, connectors and fuses for open and short, etc.
(c)
Warm up the engine to the normal operating temperature.
(d)
Confirm the problem symptoms and conditions, and check the DTCs according to the applicable chart.
OK
Go to step 5
NG
4
DTC chart
(a)
Check the results obtained in step 3, then confirm the inspection procedure for the system or the part
which should be checked using the DTC chart.
Go to step 6
5
Problem symptoms chart
(a)
Check the results obtained in step 3, then confirm the inspection procedure for the system or the part
which should be checked using the problem symptoms table.
6
Circuit inspection or parts inspection
(a)
Confirm the circuit for the system or the part which should be checked using the problem symptoms
table or the results obtained in step 4.
7
Repair
(a)
Repair the affected system or part in accordance with the instructions in step 6.
