ECC Without A/C Function

The ECC climate system without A/C is still equipped with self-diagnostics; however, the driver is not provided with an automatic fault warning in the form of a flashing lamp.

The driver will be aware that a fault is present only by the fact that the system is not working.

The ECC control module must be removed to request a DTC. The test button and LED are located on a printed circuit board inside the module.

Conditions for requesting DTC


NOTE: To allow the control module time for fault diagnosis and stabilization, a DTC should not be requested within the first 5 seconds after the engine has been started.
The following conditions must be fulfilled when requesting a DTC:










- Engine running
- Blower selector (1) in AUT setting as shown
- Function selector (2) in VENT setting as shown
- Temperature control (3) in MAX COOLING setting as shown
- Rec button (4) pressed in as shown (check that lamp is lit).




A strong light (not a fluorescent tube) must be shone on the solar sensor, otherwise the DTC for the sensor will be displayed even if the device is fault-free.


NOTE: If this is forgotten, the ignition must be switched off (DTC erased) before the nest request is made, otherwise the sensor DTC will be displayed again.


Preparations




Remove control panel from dashboard.


NOTE: Control wiring should remain connected.


Remove decorative trim around ECC control module.
Pry off carefully with small screwdriver. Allow trim to remain hanging on wiring.




Remove:
ECC control module (4 TX10 screws).
Withdraw module with wiring still attached.




Remove control module cover (2 screws).