Control module and output signals

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

DTC	Error Message	Diagnostic Procedure	Malfunction Criteria and Threshold Value	Secondary Parameters with Enable Conditions	Monitoring Time Length	Frequency of checks, MIL Illum
P0600	Serial Communication Link	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .	Short to battery positive Short to ground Core connection ECM receiving no signal from CAN bus	---	0.5 Sec 0.5 Sec	2 DCY
P0601	Internal Control Module Memory Check Sum Error	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .	Calculate check sum		0.5 Sec	2 DCY
P0602	Control Module Programming Error	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .	Message arriving from automatic transmission while ECU is calibrated for manual transmission-Message from automatic transmission	---	0.5 Sec	2 DCY
P0603	Internal Control Module Memory Check Sum Error	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing . Replace the Transmission Control Module (TCM) J217. Refer to → 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for 5 SPD. AUTOMATIC TRANSMISSION 01V 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING or → 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for CONTINUOUSLY VARIABLE TRANSMISSION (CVT) 01J 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for CONTINUOUSLY VARIABLE TRANSMISSION (CVT) 01J - INTERNAL COMPONENTS, SERVICING .	Write and read back value is not correct	---	200 mS	yes; immediate
P0604	Internal Control Module Random Access Memory (RAM) Error	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .	Write ability check		0.5 Sec	2 DCY
P0605	Internal Control Module Read Only Memory (ROM) Error	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .	Wrong check sum		0.5 Sec	2 DCY
P0606	Internal Control Module Memory Check Sum Error	Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .	Short to Battery +, > 4.88 V Short to Ground, 0.14 V	---	2 Sec	2 DCY
P0638	Throttle Actuator Control Range/Performance	Check the Throttle Valve Control Module J338. Refer to → Throttle Valve Control Module J338 , checking .	OPEN to > ref. Point (+) 12%- t> 0.14 seconds Then CLOSED to ref. point (+) 3% t > 0.56 Sec Closed to 1% t > 0.3 Sec then OPEN to ref. (-) 1.5% t > 0.56 Sec Voltage ranges- sensor1: 0.21 - 0.87 V sensor 2: 4.14 - 4.84 V	Ignition-ON Engine speed-0 Rpm Intake air temperature-> 5°C Vehicle speed-0 Mph ECT-> 5°C Ignition-ON Engine speed-0 Rpm Intake air temperature-> 5°C Vehicle speed-0 Mph ECT-> 5°C Ignition-ON Engine speed-0 Rpm Intake air temperature-> 5°C Vehicle speed-0 Mph ECT-> 5°C	5 Sec	2 DCY
P0685	ECM/PCM Power Relay Control CircuitOpen	Check the Motronic Engine Control Module (ECM) Power Supply Relay J271. Refer to → Motronic Engine Control Module (ECM) Power Supply Relay J271 , checking .	Open circuit-Control voltage 0.61 Volts	Sense circuit voltage-3.0 Volts	0.5 Sec	2 DCY
P0686	ECM/PCM Power Relay Control Circuit Low	Check the Motronic Engine Control Module (ECM) Power Supply Relay J271. Refer to → Motronic Engine Control Module (ECM) Power Supply Relay J271 , checking .	Short to ground-Control voltage 0.51 Volts	Sense circuit voltage- > 5.5 V	0.5 Sec	2 DCY
P0687	ECM/PCM Power Relay Control Circuit High	Check the Motronic Engine Control Module (ECM) Power Supply Relay J271. Refer to → Motronic Engine Control Module (ECM) Power Supply Relay J271 , checking .	Short to battery positive-Control voltage >4.0 Volts	Sense circuit voltage- 3.0 V	0.5 Sec	2 DCY
P0688	ECM/PCM Power Relay Sense Circuit Open	Check the Motronic Engine Control Module (ECM) Power Supply Relay J271. Refer to → Motronic Engine Control Module (ECM) Power Supply Relay J271 , checking .	Voltage too low-3.0 Volts	Main relay- On	2 Sec	2 DCY