DTC 3-2-1, 3-2-2, 3-2-3, 3-2-4 and 3-2-5

DTC 3-2-1, 3-2-2, 3-2-3, 3-2-4 AND 3-2-5
DAMPER MOTOR ACTIVE TOO LONG:








DTC 3-2-1 = Driver side damper motor active too long.
DTC 3-2-2 = Passenger side damper motor active too long.
DTC 3-2-3 = Ventilation damper motor active too long.
DTC 3-2-4 = Floor/defrost damper motor active too long.
DTC 3-2-5 = Recirculation damper motor active too long.

- Condition for DTC:
If damper motor fails to reach the correct setting within a time limit of approx. 12 sec., it will be cut off. The control module records the fault and stores the DTC.

- Cause of fault:
This fault can occur if a damper is stuck or a damper motor is faulty.

- Symptoms:
Fault warning to driver. LEDs by A/C and REC buttons flash for 20 sec. Control module shuts off damper motor and compensates for the loss as follows:
- For DTC 3-2-1 and 3-2-2
Control module does not use substitute value for these two DTCs.

- For DTC 3-2-3 and 3-2-4:
Control module uses a substitute value equivalent to 100 % defrost setting on air distribution switch.

- For DTC 3-2-5:
Control module uses a substitute value equivalent to 0 % recirculation setting on air distribution switch.

Check Other DTCs:
3-2-1, 3-2-2, 3-2-3, 3-2-4 and 3-2-5. If these DTCs are stored as well, this may be because the control module in a left-hand-drive car has been set for right-hand drive or vice versa. Check connection A:28 (#28). Left-hand-drive cars should be open (not grounded). Right-hand drive cars should be grounded.
Check DTC. Test Procedures
If DTCs still recur, carry out self-adjustment of damper motor limit positions. Self Adjustment of Damper Motor Limit Positions

Connect Test Unit To Control Unit:





- Ignition off.
- Connect test unit between control module and A/C system connector and check GND points. Connecting and Disconnecting Test Unit
- Go to the next step "Check Control Voltage To Damper Motor".

Check Control Voltage To Damper Motor:











- Ignition on.
- Connect a voltmeter to test unit # 10 (0 V) and:
Driver side damper motor, to test unit # 31.
Passenger side damper motor, to test unit;# 33.
Ventilation damper motor, to test unit # 37.
Floor/defrost damper motor, to test unit # 35.
Recirculation damper motor, to test unit # 39.
Run a function check. Description and Operation
Turn air supply switch to/from different settings as in function diagram and observe voltmeter.
- If value is OK, voltmeter should show control voltage of approx. +/- 12 V while the damper is moving to its new setting.
- If value is not OK, if voltmeter reads approx. +/- 12 V for a longer time than approx. 12 sec, the damper is stuck or there is a mechanical fault in the damper motor.
Turn air supply switch to/from settings as above and see if damper can move freely.
The ventilation damper motor also has a geared segment which engages with the damper shaft, check that this can move freely.
Is damper stuck?
Rectify.
If it is not stuck. Remove damper motor. Replace damper motor and refit in reverse order. Service and Repair
Carry out self-adjustment of damper motor limit positions. Self Adjustment of Damper Motor Limit Positions
Check DTC. Test Procedures