Suzuki Grand Vitara JB416 / JB420. Manual - part 275
7A-6 Heater and Ventilation:
Description for Each Step
Step 1. Customer complaint analysis
Talk to customer, and then record details of the problem.
Customer questionnaire (example)
NOTE
The form is a standard sample. It should be modified according to conditions characteristic of each
market.
Step 2. Visual inspection
As a preliminary step, be sure to perform visual check of the items that support proper function of the heater and
ventilation referring to “Visual Inspection”.
Step 3. DTC check
Check DTC referring to “DTC Check”.
Step 4. Troubleshooting malfunction
Based on the DTC, perform an applicable DTC diagnostic flow and locate the cause of the trouble, namely in a sensor,
wire harness, connector, actuator, HVAC control module or other part and repair faulty parts.
Step 5. Heater and ventilation system symptom diagnosis
Check any part or system suspected to be a possible cause referring to “Heater and Ventilation Symptom Diagnosis”.
Step 6. Check for intermittent problem
Check any part 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 trouble cord recorded.
Step 7. Final confirmation test
Confirm if the problem symptom is troubleshooting and the heater and ventilation system is free from any abnormal
conditions. If there existed DTC, clear the DTC. Then, check if the DTC is still detected and if there is any other DTC.
Customer’s Name:
Model:
VIN:
Date of Issue:
Date of Reg.
Date of Problem:
Mileage:
Problem Symptoms
• REC indicator lamp and/or FRE indicator lamp abnormal: fails to turn on / fails to turn
off / flashes
• Abnormal noise while is working: from blower motor / from HVAC unit / from engine
room, other_______________
• Air intake selector dose not work:
• Blower speed selector dose not work:
• Temperature selector dose not work:
• Other:
Frequency of Occurrence
• Continuous / Intermittent (_____ times a day, a month) / other_______________
Conditions for Occurrence of
Problem
• Vehicle at stop & blower motor is working:
• For some time after blower speed selector is ON:
• When outside air temperature is high:
• When outside air temperature is low:
• All the time:
Environmental Condition
• Weather: fair / cloudy / rain / snow / other_______________
• Temperature: _____
°F (_____ °C)
Diagnostic Trouble Code
• First check: Normal code / malfunction code (__________)
• Second check: Normal code / malfunction code (__________)