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Suzuki Grand Vitara JB627. Manual - part 19

1A-25 Engine General Information and Diagnosis:

)

Engine basic inspection and engine symptom

diagnosis
1) Check and repair according to “Visual Inspection” and

“Engine Symptom Diagnosis”.

Are check and repair complete?

Go to Step 11.

Check and repair
malfunction part(s) and
go to Step 11.

)

Troubleshooting for DTC

1) Check and repair according to the “DTC

Troubleshooting” of the applicable DTC flow.

Are check and repair complete?

Go to Step 11.

Check and repair
malfunction part(s) and
go to Step 11.

10 ) Intermittent problems check

1) Check for intermittent problems referring to “Intermittent

and Poor Connection Inspection in Section 00”.

Is there any faulty condition?

Repair or replace
malfunction part and go
to Step 11.

Go to Step 11.

11 ) Final confirmation test

1) Clear DTC if any.
2) Perform final confirmation test referring to each “DTC

Confirmation Procedure”.

Is there any problem symptom, malfunction DTC or
abnormal condition?

Go to Step 6.

End.

Step

Action

Yes

Engine General Information and Diagnosis: 1A-26

Description for Each Step
Step 1: Customer complaint analysis
Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this purpose,
use of such an inspection form will facilitate collecting information to the point required for proper analysis and
diagnosis.

NOTE
The form is standard sample. It should be modified according to conditions and characteristics of
each market.

Customer problem inspection form (Example)

IYSQ01113005-01

1A-27 Engine General Information and Diagnosis:

Step 2: DTC / freeze frame data check, record and clearance
First, check DTC (including pending DTC), referring to “DTC Check”. If DTC is indicated, record DTC and freeze frame
data. After that clear DTC referring to “DTC Clearance”. DTC indicates malfunction that occurred in the system but
does not indicate whether it exists now or it occurred in the past and the normal condition has been restored now. To
check which case applies, check the symptom in question according to Step 5 and recheck DTC according to Step 6
and 7.
Attempt to diagnose a trouble based on DTC in this step only or failure to clear the DTC (including pending DTC) in
this step will lead to incorrect diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting.

Step 3 and 4: Visual inspection
As a preliminary step, be sure to perform visual check of the items that support proper function of the engine referring
to “Visual Inspection”.

Step 5: Trouble symptom confirmation
Based on information obtained in ) “Customer complaint analysis” and )”DTC / freeze frame data check”, confirm
trouble symptoms. Also, reconfirm DTC according to “DTC Confirmation Procedure” described in each diag. flow.

Step 6 and 7: DTC / freeze frame data check
Refer to “DTC Check” or checking procedure.

Step 8: Engine basic inspection and engine symptom diagnosis
Perform basic engine check according to the “Engine Basic Check” first. When the end of the flow has been reached,
check the parts of the system suspected as a possible cause referring to “Engine Symptom Diagnosis” and based on
symptoms appearing on the vehicle (symptoms obtained through steps of customer complaint analysis, trouble
symptom confirmation and/or basic engine check) and repair or replace faulty parts, if any.

Step 9: DTC troubleshooting
Based on the DTC indicated in Step 6 or 7 and referring to the applicable DTC diag. flow, locate the cause of the
trouble, namely in a sensor, switch, wire harness, connector, actuator, ECM or other part and repair or replace faulty
parts.

Step 10: Intermittent problems check
Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to
“Intermittent and Poor Connection Inspection in Section 00” and related circuit of DTC recorded in Step 2.

Step 11: Final confirmation test
Confirm that the problem symptom has gone and the engine is free from any abnormal conditions. If what has been
repaired is related to the DTC, clear the DTC once, perform DTC confirmation procedure and confirm that no
malfunction DTC (a normal code) is indicated.