Manual Climate Control

DA. Overview

DA1 Read the information in the Heating and Air Conditioning System
- Read Service Precautions
- Read Description and Operation
- Read Service and Repair
- Read Fault Tracing Symbols
- Read Locations

Then continue with: DA2

DA2 Read the section Fault-tracing MCC diagnostic trouble codes (DTCs)







- For MCC, read How to Display and Read Diagnostic Trouble Codes, Volvo on-board diagnostic (OBD) system.

- If communication with the MCC control module cannot be established refer Diagnosis By Symptom, Checking communication with MCC control module.

Read off and note down the diagnostic trouble codes (DTCs)


NOTE! For MCC control.If diagnostic trouble code (DTC) 1-1-1 is displayed the control module has not registered any faults.

Have diagnostic trouble codes (DTCs)) been stored?
Yes: Go to DA3
No: Go to DA5


DA3 DTC table
- Remedy diagnostic trouble codes (DTCs) according to instructions and then erase diagnostic trouble codes (DTCs).
- Test drive the car.
- Run all functions in the climate control unit. Pay careful attention to any symptoms.

Have one or more diagnostic trouble codes (DTCs) been stored again?
Yes: Go to DA3
No: Go to DA4

DA4 No diagnostic trouble code (DTC) stored

Do the fault symptoms persist?
Yes: Go to DA5
No: Go to DA7

DA5 Table of symptoms
- Select the appropriate fault symptoms and follow the relevant instructions.
- Test drive the car.
- Run all functions in the climate control unit. Pay careful attention to any symptoms.

Are the fault symptoms still present?
Yes: Go to DA6
No: Go to DA7

DA6 Breakout box and parameter tables






- For climate control with MCC, connect breakout box according to QQQB. Connection of breakout box MCC and measure all terminals according to RRRB. Signal descriptions MCC.

Then continue with: DA7

DA7 Final check






- Final work after fault-tracing/repairs.
- Check that no diagnostic trouble codes (DTCs) have been stored in other systems during fault-tracing.
- Erase any diagnostic trouble codes (DTCs) before the car is returned to the customer.

Then continue with:
- Fault corrected