Diagnosis And Troubleshooting - Chery T21 2014 Service Manual

02 - INTRODUCTION

Diagnosis and Troubleshooting

1. Diagnosis basis and troubleshooting methods
Procedure Types
02
Diagnosis based on DTC
Diagnosis based on symptoms (no
DTCs stored)
2. Detailed troubleshooting steps
Step
1 Obtain detailed information when electrical malfunction occurs.
Operate affected system, and perform a road test as necessary.
2 Confirm malfunction parameter.
If it is impossible to duplicate malfunction, refer to "Electrical Malfunction Simulation Test".
Collect proper diagnosis materials, which includes:
 Circuit Diagram
 System Schematic Diagram
3  Relevant Chapter in Service Manual
 Service Bulletin
Perform diagnosis according to the mastered system operation knowledge and customer's
feedback.
Check if there is any bonding, loose connector or damaged wire harness in the system.
4
Determine related circuits and components, and diagnose according to the circuit diagram and
wire harness layout diagram.
5 Repair circuit and replace component as necessary.
Operate system in all modes. Confirm that system can operate normally in all conditions.
6 Confirm that you have not inadvertently created new malfunctions during your diagnosis or
repair steps.
16
02–
Details
Diagnosis procedure is based on
stored DTC.
Diagnosis procedure is based on
problem symptoms.
Description
Troubleshooting Methods
Use eliminating methods to
determine malfunctioning parts in
accordance with DTC detection
conditions.
Inspect relevant parts with tester
and eliminate possible
malfunctions one by one.
Use eliminating methods to
determine the malfunctioning parts
in accordance with symptoms.
Inspect relevant parts with tester
and eliminate possible
malfunctions one by one.
Chery Automobile Co., Ltd.