Control module and output signals

2005 Audi A6 3.2 TSECTION Control module and output signals
WARNING: This page is about a different car, the 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
DTC Error Message Diagnostic Procedure Monitor Strategy Malfunction Criteria and Threshold Value Secondary Parameters with Enable Conditions Monitoring Time Length Frequency of checks, MIL Illum
P0600 Serial Communication Link
  • Eliminate malfunction in Can-bus components according to the wiring diagram
Signal check. No message received from DME or Invalid data, timeout
  • CAN Bus, no error and ready to transmit
  • Delay after engine on, 0.5 S
  • Battery voltage, > 9 V
0.5 Seconds
  • Continuous
  • 2 DCY
  • Immediate
P0601 Internal Control Module Memory Check Sum Error Internal Check Sum Verification. Internal check sum, incorrect   0.5 Seconds
  • Continuous
  • 2 DCY
P0604 Internal Control Module Random Access Memory (RAM) Error RAM Check. Write ability check, failed   0.5 Seconds
  • Continuous
  • 2 DCY
P0605 Internal Control Module Read Only Memory (ROM) Error EPROM Check. Check, failed   0 Seconds
  • Continuous
  • 2 DCY
P0606 ECM/PCM Processor
  • EEPROM Check
  • Drive by Wire Module Check
  • Engine operation condition, Out of range
  0.5 Seconds
  • Continuous
  • 2 DCY
P0607 Control Module Performance
  • EEPROM Check
  • Drive by Wire Module Check
SW verify of EEPROM emulation, negative   0 Seconds
  • Continuous
  • 2 DCY
P0614 ECM/TCM Incompatible Signal check. CAN level engine does not fit CAN level transmission
  • CAN Bus, no error and ready to transmit
  • Delay after engine on, 0.5 S
  • Ignition, status on
0 Seconds
  • Continuous
  • 2 DCY
P0638 Throttle Actuator Control Range/Performance - Bank 1
  • Rationality Check, Close Movement
  • Signal range check At mechanical stop, low
  • Time to open over reference point + 12%, > 0.14 s
  • Time to close below reference point, + 3%, > 0.56s
or
  • Time to open over reference point + 12%, > 0.14 s
  • Time to close below reference point, + 3%, > 0.56s
  • TPS 1 signal voltage, not (0.42-0.77) V
  • TPS 2 signal voltage, not (4.26-4.58) V
  • Ignition, on
  • Engine speed, 0 RPM
  • IAT, >5°C
  • Vehicle speed, 0 MPH
  • ECT, >5°C
0.5 Seconds
  • Continuous
  • 2 DCY
P0641 Sensor Reference Voltage A Circuit/Open Open Circuit. Internal communication, failure A   0.5 Seconds
  • Continuous
  • 2 DCY
P0642 Sensor Reference Voltage A Circuit Low Out of Range, Low. Signal voltage, 4.5-5 V   0.5 Seconds
  • Continuous
  • 2 DCY
P0643 Sensor Reference Voltage A Circuit High Out of Range, High. Signal voltage, >5-5.4 V   0.5 Seconds
  • Continuous
  • 2 DCY
P0651 Sensor Reference Voltage B Circuit/Open Open Circuit. Internal communication, failure A   0.5 Seconds
  • Continuous
  • 2 DCY
P0652 Sensor Reference Voltage B Circuit Low Out of Range, Low. Signal voltage, 4.5-5 V   0.5 Seconds
  • Continuous
  • 2 DCY
P0653 Sensor Reference Voltage B Circuit High Out of Range, High. Signal voltage, >5-5.4 V   0.5 Seconds
  • Continuous
  • 2 DCY
P0657 Actuator Supply Voltage A Circuit/Open
  • Check Engine Component Power Supply Relay J757
Open Circuit. Signal voltage, > 4.4-5.6 V
  • Relay, commanded off
  • Engine speed, > 80 RPM
0.5 Seconds
  • Continuous
  • 2 DCY
P0658 Actuator Supply Voltage A Circuit Low
  • Check Engine Component Power Supply Relay J757
Short to Ground. Signal voltage, 2.15-3.25 V
  • Relay, commanded off
  • Engine speed, 80 RPM
0.5 Seconds
  • Continuous
  • 2 DCY
P0685 ECM/PCM Power Relay Control Circuit/Open Open Circuit.
  • Control voltage, 2.6-3.7 V
  • Sense circuit voltage, 6 V
Ignition, off 0.5 Seconds
  • Continuous
  • 2 DCY
P0686 ECM/PCM Power Relay Control Circuit Low Short to Ground.
  • Control voltage, 2.6-3.7 V
  • Sense circuit voltage, >6 V
Ignition, off 0.5 Seconds
  • Continuous
  • 2 DCY
P0687 ECM/PCM Power Relay Control Circuit High Short to Battery (+).
  • Signal current, >1.4-0.7 A
  • Sense circuit voltage, >6 V
Ignition, off 0.5 Seconds
  • Continuous
  • 2 DCY
P0688 ECM/PCM Power Relay Sense Circuit Signal Range Check.
  • Sense voltage, 3.0 V
  • Sense voltage, >3.0 V
  • Main relay, commanded on
  • Main relay, commanded off
0.5 Seconds
  • Continuous
  • 2 DCY
P0697 Sensor Reference Voltage C Circuit/Open Open Circuit. Internal communication, failure A   0.5 Seconds
  • Continuous
  • 2 DCY
P0698 Sensor Reference Voltage C Circuit Low Out of Range, Low. Signal voltage, 4.5-5 V   0.5 Seconds
  • Continuous
  • 2 DCY
P0699 Sensor Reference Voltage C Circuit High Out of Range, High. Signal voltage, >5-5.4 V   0.5 Seconds
  • Continuous
  • 2 DCY
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.