Mercedes Benz Truck R 320 BLUETEC Technical LI83-00_P-047470 Date: 090724
A/C - Erratic/Incorrect Air Distribution
IMPLAUSIBLE AIR DISTRIBUTION/FAULTY OR IMPLAUSIBLE TEACH-IN PROCESS OF ACTUATOR MOTORS -- ESPECIALLY
AFTER REPLACEMENT OF AAC CONTROL PANEL OR AC HOUSING
Topic Number LI83.00-P-047470
Version 1
Design Group 83.00 General
Date 07-24-2009
Validity BR164/251/with code 581/582
Reason for change
Reason for block
Complaint:
Implausible air distribution/faulty or implausible teach-in process of actuator motors - especially after replacement of AAC control panel or AC
housing.
Cause:
Since 5 May 2007, the actuator motor for temperature lowering at the center air vent (M 16/27) in the air conditioner housing has been discontinued,
Mercedes Benz Truck R 320 BLUETEC
Page 266
both in series production and in the replacement parts system.
Remedy:
When replacing an AAC control panel or an air conditioner housing, the revelant coding must be set in the AC control unit using DAS.
The following applies:
1. AAC control panel replacement (vehicle is equipped with original AC housing from plant): Depending on the production date of the vehicle, the
coding "Actuator motor for temperature lowering at center air vent (M 16/27)" must be set to present or not present using DAS.
2. AC housing replacement: Since the new AC housing from the replacement parts system is no longer equipped with actuator motor M 16/27, the
coding "Actuator motor for temperature lowering at center air vent (M 16/27)" must regardless of the production date of the vehicle, always be to
"not present"
3. ACC control panel replacement (vehicle is not equipped with original AC housing from plant - housing was already replaced as part of a past
repair): Check when the replacement AC housing was installed in the vehicle repair history. If the AC housing was replaced before May, 2007 set
the DAS coding "Actuator motor for temperature lowering at center air vent (M 16/27" to present. If the AC housing was replaced after May 2007,
set the DAS coding "Actuator motor for temperature lowering at center air vent (M 16/27)" to not present.
The DAS coding "Actuator motor for temperature lowering at center air vent (M 16/27)" is found under:
Control units - Air conditioning - AAC - Control unit adaptation - Read codings and change if necessary - All codings - Actuator motor for
temperature lowering at center air vent (M 16/27)
Symptoms
Work units
Mercedes Benz Truck R 320 BLUETEC
Page 267
Validity
A/C - Erratic/Incorrect Air Distribution
IMPLAUSIBLE AIR DISTRIBUTION/FAULTY OR IMPLAUSIBLE TEACH-IN PROCESS OF ACTUATOR MOTORS -- ESPECIALLY
AFTER REPLACEMENT OF AAC CONTROL PANEL OR AC HOUSING
Topic Number LI83.00-P-047470
Version 1
Design Group 83.00 General
Date 07-24-2009
Validity BR164/251/with code 581/582
Reason for change
Reason for block
Complaint:
Implausible air distribution/faulty or implausible teach-in process of actuator motors - especially after replacement of AAC control panel or AC
housing.
Cause:
Since 5 May 2007, the actuator motor for temperature lowering at the center air vent (M 16/27) in the air conditioner housing has been discontinued,
Mercedes Benz Truck R 320 BLUETEC
Page 266
both in series production and in the replacement parts system.
Remedy:
When replacing an AAC control panel or an air conditioner housing, the revelant coding must be set in the AC control unit using DAS.
The following applies:
1. AAC control panel replacement (vehicle is equipped with original AC housing from plant): Depending on the production date of the vehicle, the
coding "Actuator motor for temperature lowering at center air vent (M 16/27)" must be set to present or not present using DAS.
2. AC housing replacement: Since the new AC housing from the replacement parts system is no longer equipped with actuator motor M 16/27, the
coding "Actuator motor for temperature lowering at center air vent (M 16/27)" must regardless of the production date of the vehicle, always be to
"not present"
3. ACC control panel replacement (vehicle is not equipped with original AC housing from plant - housing was already replaced as part of a past
repair): Check when the replacement AC housing was installed in the vehicle repair history. If the AC housing was replaced before May, 2007 set
the DAS coding "Actuator motor for temperature lowering at center air vent (M 16/27" to present. If the AC housing was replaced after May 2007,
set the DAS coding "Actuator motor for temperature lowering at center air vent (M 16/27)" to not present.
The DAS coding "Actuator motor for temperature lowering at center air vent (M 16/27)" is found under:
Control units - Air conditioning - AAC - Control unit adaptation - Read codings and change if necessary - All codings - Actuator motor for
temperature lowering at center air vent (M 16/27)
Symptoms
Work units
Mercedes Benz Truck R 320 BLUETEC
Page 267
Validity
