Preliminary work: Function test 11

Preparation for Test (DTC readout): 1. Fuses OK. 2. Battery voltage >11 V. 3. Unlock via RCL vehicle. 4. Ignition ON. 5. Connect Hand-Held Tester (HHT) according to connection diagram shown in section 0. Note: The diagnostic trouble codes (DTC's) can only be read out and erased using the Hand-Held Tester (HHT). Model 129 The RCL control module (N54) 129 820 29 26 can only be read out via the impluse counter. Note regarding Diagnostic Trouble Codes (DTC's): Current diagnostic trouble codes are highlighted in black on the display. Additional detailed fault information based on fault type is displayed with nearly all diagnostic codes (DTC's) such as: > Resistance too great < Resistance too low - Short circuit to ground (GND) + Short circuit to positive (POS) -//- Open circuit

RCL control module (N54) Diagnostic Trouble Codes

DTC	Possible cause	Test step/Remedy 1)
	Red indicator lamp, -	23 5.0, 9.0, 13.0
	Green indicator lamp, -	23 6.0, 10.0, 14.0
	Red indicator lamp, +	23 5.0, 9.0, 13.0
	Green indicator lamp, +	23 6.0, 10.0, 14.0

1) Observe Preparation for Test, see 22.

IR DAS control module (N54/1) Diagnostic Trouble Codes

DTC	Possible cause	Test step/Remedy 1)
	IR DAS control module (N54/1)	Replace N54/1
	Control line deactivation, + or -	23 33.0 - 37.0, 39.0
	Control line activation, + or -	23 32.0 - 35.0, 38.0, 39.0
	Incorrect authorization code, motor electronics (CAN)	11 13.0
	Incorrect authorization code, engine control module, left cylinder bank, (CAN)	11 13.0
	Invalid transponder code	IR transmitter defective, replace IR transmitter key.
	Coil for transponder (energy could not be built up; or transponder does not respond).	23 40.0, 41.0 Erase DTC memory, Try another IR transmitter key.

1) Observe Preparation for Test, see 22.