Comprehensive Component Monitor (Engine Output) 1

OBD System Description - Comprehensive Component Monitor (Engine Output)

Throttle Position Sensor #2 Electrical Diagnosis (TP)
DTC
P0222 (TP 2) (Low Volts) Refer to DTC P0222: Throttle Position (TP) Sensor 2 Circuit Low Voltage. P0222
P0223 (TP 2) (High Volts) Refer to DTC P0223: Throttle Position (TP) Sensor 2 Circuit High Voltage. P0223

MONITOR STRATEGY DESCRIPTION
This Diagnosis is to detect an Electrical malfunction, Short circuit to Battery voltage, SCG, OL.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Low Volts:
TP Volts < 0.142 V
Fail time max = 120 ms
P222 = Active
Low Volts:
TP Volts > 4.956 V
Fail time max = 120 ms
P223 = Active

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Enable Conditions:
Ignition Key "ON"
Disable Conditions:
- TPS fault
- Limp home active

TIME LENGTH AND FREQUENCY
Recurrence rate: 10 ms

Throttle Actuator Control Range/Performance
DTC
P0638 Refer to DTC P0638: Throttle Actuator Control (TAC) Command Performance. P0638

MONITOR STRATEGY DESCRIPTION
The task of this diagnosis is to detect a throttle valve error or a jammed ETC actuator. The diagnosis observes the ETC position controller system deviation dependent on the gradient of the throttle position set point. The anti-bounce of the error detection is done by the generic error management. The increment and decrement value of the anti-bounce algorithm can be calibrated. Additionally the PWM output of the digital position controller is monitored by this diagnosis function. If the moving mean value of PWM ETC exceeds a defined diagnosis threshold than an error will be indicated. The calculation of the moving mean value is done by low pass first order. The aim of this function is to protect the ETC components, because a high current of the rotor electrical circuit over a long time can destroy the ETC components.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
The conditions are fulfilled.
| Position controller deviation | > Maximum admissible control deviation of the closed-loop position control system
=> Error in system deviation check detected
Moving mean value of the ETC position controller output > Maximum permitted PWM output of the ETC position controller 89.99%
=> Error in component protection detected
Fail Time = 480 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Ignition ON
Error on ETC Control = false
Inhibition for ETC Control Diag = false

TIME LENGTH AND FREQUENCY
Recurrence rate: 10 ms

Throttle Position Sensor Jammed
DTC
P2110 (Limited RPM) Refer to DTC P2110: Throttle Actuator Control (TAC) System - Forced Limited Engine Speed. P2110
P2111 (Stuck Open) Refer to DTC P2111: Throttle Actuator Control (TAC) Throttle Valve Stuck Open. P2111
P2112 (Stuck Closed) Refer to DTC P2112: Throttle Actuator Control (TAC) Throttle Valve Stuck Closed. P2112

MONITOR STRATEGY DESCRIPTION
In case of very low temperatures it is possible that the throttle actuator is jammed by ice. The described module is used for the detection and the removing of ice between throttle flap and body. The functionality is able to detect the location of the throttle flap disturbance. We can distinguish ice in closing and opening throttle flap direction.
The ice shall be removed with a variation of the set point for the digital position controller. If the ice-breaking is not possible then the throttle position set point will be limited in lower or upper direction depends on the detected ice location.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Internal check => done by hardware.
The diagnostic conditions of the ETC jam detection are true as long as the general disable condition isn't set. The diagnosis distinguishes two types of present errors, the first is a normal error only for the indication and the other one shall indicate a safety critical error with finally fault reaction request (ETC power stage deactivation, engine speed limitation). The error symptoms are defined for this diagnosis as:
TPS jammed in closing direction (= SYM_0)
DTC P2112
TPS jammed in opening direction (= SYM_1)
DTC P2111
TPS jammed safety critically (= SYM_2)
DTC P2110

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Ignition ON

TIME LENGTH AND FREQUENCY
Recurrence rate: 20 ms

Throttle position adaptation
DTC
P2119 Refer to DTC P2119: Throttle Closed Position Performance. P2119

MONITOR STRATEGY DESCRIPTION
The throttle position is determined by a two-channeled sensor. Both channels deliver inverse dispersing voltage signals. In order to reduce the measurement inaccuracy, the two signal voltages will be referenced to their supply voltage. After the initial engine start and component change the sensor characteristic is learnt within an adaptation routine. The learned values for the limp-home position, the lower mechanical stop and the TPS 1 amplification are stored at the end of the driving cycle as "non-volatile".

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Adaptation error:
Waiting period after ignition switch-ON, to get plausible battery voltage = 0
battery voltage < 9.039 V or
RPM >= 192 rpm or
Air temperature at the throttle body < 0 degrees C or
0 degrees C >= ECT >= 99.75 degrees C or
Adaptation requested
TPS error or error between actual and requested ETC current
=> Error
Or
Diagnosis time for each the adaptation and start check step <= 0 ms => error detected
(adaptation of the measuring amplifier not possible)
Measuring amplifier is outside the defined range:
Diagnosis time for each the adaptation and start check step > 0 ms (Throttle flap opening angle for electronic throttle control - Position set point request for the adaptation of the measuring amplifier) <= 0.503 degrees TPS Adaptation value of the amplification factor of amplified TPS 1 < 3.85
-> Amplification too low, error detected
Adaptation value of the amplification factor of amplified TPS 1 > 4.15
-> Amplification too high, error detected
Spring check error occurs during the adaptation:
Throttle position set point during adaptation = Position set point request for the adaptation of the measuring amplifier and Diagnosis time for each the adaptation and start check step <= 0 ms
Or
Throttle position set point during adaptation = 14.997 degrees TPS and Diagnosis time for each the adaptation and start check step <= 0 ms
-> Error detected (throttle position for the upper return spring check not reached)
Throttle position set point during adaptation >= 1.999 degrees TPS
Diagnosis time for each the adaptation and start check step <= 0 ms
-> Error detected (throttle position for the lower return spring check not reached)
Diagnosis time for each the adaptation and start check step <= 0 ms
-> Error detected (L I H position not reached, error in return spring check)
Error occurs in the TPS start check:
- Engine not stopped or - battery voltage < 9.039 V or
- RPM >= 192 rpm or
- Air temperature at the throttle body < 0 degrees C or
- 0 degrees C >= ECT >= 99.75 degrees C and
- Adaptation requested and
- Throttle position set point during adaptation >= 14.007 degrees C
- Diagnosis time for each the adaptation and start check step<= 0
-> Error in spring check

battery voltage > 9.039 V
RPM < 192 rpm
Air temperature at the throttle body >= 0 degrees C
0 degrees C < ECT < 99.75 degrees C
And
Diagnosis time for each the adaptation and start check step <= 0
-> Error in limb-home check

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Enable Conditions:
Active TPS adaptation
Ignition ON

TIME LENGTH AND FREQUENCY
Recurrence rate: 5 ms

Fuel Pump Primary Circuit
DTC
P0230 Refer to DTC P0230: Fuel Pump Relay Control Circuit. P0230

MONITOR STRATEGY DESCRIPTION
The purpose is to diagnose the signal from the driver which controls the electric fuel pump relay signal.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Error-symptoms are defined to this diagnosis function as following:
Short circuit to Vbatt (SCB) (= SYM_0)
Short circuit to GND (SCG) (= SYM_1)
Open load (OL) (= SYM_2)
Fail Time = 1,500 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Enable Conditions:
10.968 V < Battery voltage < 16.046 V
IGK "ON"

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Injector Control Circuit Cylinder #1
DTC
P0261 Refer to DTC P0261: Injector 1 Control Circuit Low Voltage. P0261
P0262 Refer to DTC P0262: Injector 1 Control Circuit High Voltage. P0262

MONITOR STRATEGY DESCRIPTION
This function will detect an open line, short to ground, and short to battery voltage on Injector Cylinder #1.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Detection of injection valve errors are done by hardware diagnosis
Fail Time = 3,000 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
OL Diagnosis and Short circuit to ground:
|Engine speed| > 320 rpm
Engine speed < 6,016 rpm
Short circuit to Battery voltage Diagnosis:
IGN = ON
No inhibit on injector circuit
10.968 V < Battery voltage < 16.046 V
Engine speed > 320 rpm

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Injector Control Circuit Cylinder #2
DTC
P0264 Refer to DTC P0264: Injector 2 Control Circuit Low Voltage. P0264
P0265 Refer to DTC P0265: Injector 2 Control Circuit High Voltage. P0265

MONITOR STRATEGY DESCRIPTION
This function will detect an open line, short to ground, and short to battery voltage on Injector Cylinder #2.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Detection of injection valve errors are done by hardware diagnosis.
Fail Time= 1,500 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
OL Diagnosis and Short circuit to ground:
|Engine speed| > 320 rpm
Engine speed < 6,400 rpm
Short circuit to Battery voltage Diagnosis:
IGN = ON
No inhibit on injector circuit
10.968 V < Battery voltage < 16.046 V
Engine speed > 320 rpm

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Injector Control Circuit Cylinder #3
DTC
P0267 Refer to DTC P0267: Injector 3 Control Circuit Low Voltage. P0267
P0268 Refer to DTC P0268: Injector 3 Control Circuit High Voltage. P0268

MONITOR STRATEGY DESCRIPTION
This function will detect an open line, short to ground, and short to battery voltage on Injector Cylinder #3.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Detection of injection valve errors are done by hardware diagnosis.
Fail Time = 1,500 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
OL Diagnosis and Short circuit to ground:
|Engine speed| > 320 rpm
Engine speed < 6,400 rpm
Short circuit to VB Diagnosis:
IGN = ON
No inhibit on injector circuit
10.968 V < Battery voltage < 16.046 V
Engine speed > 320 rpm

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Injector Control Circuit Cylinder #4
DTC
P0270 Refer to DTC P0270: Injector 4 Control Circuit Low Voltage. P0270
P0271 Refer to DTC P0271: Injector 4 Control Circuit High Voltage. P0271

MONITOR STRATEGY DESCRIPTION
This function will detect an open line, short to ground, and short to battery voltage on Injector Cylinder #4.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Detection of injection valve errors are done by hardware diagnosis.
Fail Time = 1,500 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
OL Diagnosis and Short circuit to ground:
|Engine speed| > 320 rpm
Engine speed < 6,400 rpm
Short circuit to Battery voltage Diagnosis:
IGN = ON
No inhibit on injector circuit
10.968 V < Battery voltage < 16.046 V
Engine speed > 320 rpm

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Injector Control Circuit Cylinder #5
DTC
P0273 Refer to DTC P0273: Injector 5 Control Circuit Low Voltage. P0273
P0274 Refer to DTC P0274: Injector 5 Control Circuit High Voltage. P0274

MONITOR STRATEGY DESCRIPTION
This function will detect an open line, short to ground, and short to battery voltage on Injector Cylinder #5.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Detection of injection valve errors are done by hardware diagnosis.
Fail Time = 1,500 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
OL Diagnosis and Short circuit to ground:
|Engine speed| > 320 rpm
Engine speed < 6,400 rpm
Short circuit to Battery voltage Diagnosis:
IGN = ON
No inhibit on injector circuit
10.968 V < Battery voltage < 16.046 V
Engine speed > 320 rpm

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Injector Control Circuit Cylinder #6
DTC
P0276 Refer to DTC P0276: Injector 6 Control Circuit Low Voltage. P0276
P0277 Refer to DTC P0277: Injector 6 Control Circuit High Voltage. P0277

MONITOR STRATEGY DESCRIPTION
This function will detect an open line, short to ground, and short to battery voltage on Injector Cylinder #6.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Detection of injection valve errors are done by hardware diagnosis.
Fail Time = 1,500 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
OL Diagnosis and Short circuit to ground:
|Engine speed| > 320 rpm
Engine speed < 6,400 rpm
Short circuit to Battery voltage Diagnosis:
IGN = ON
No inhibit on injector circuit
10.968 V < Battery voltage < 16.046 V
Engine speed > 320 rpm

TIME LENGTH AND FREQUENCY
Recurrence rate: 300 ms

Fuel Tank Level Output Circuit Diagnosis
DTC
P0656 Refer to DTC P0656: Fuel Level Output Circuit. P0656

MONITOR STRATEGY DESCRIPTION
The FTL PWM is driven by the ECU via an output driver. The failure detection is done by ECU Hardware. The purpose is to perform the electrical diagnosis of the FTL PWM to detect electrical faults as defined by OBD I requirements. Three symptoms are distinguished:
SCG/OL + SCB

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Direct check by Hardware
Fail Time = 1 s

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Ignition ON
Engine Starting Condition OFF
Battery voltage condition fulfilled for OBD diagnosis = true
SCB:
The fuel tank level < 0.8%
SCG:
The fuel tank level > 96.5%
OL:
The fuel tank level < 2.7%
Disable Conditions (Diag not possible):
SCP: FTL PWM < 0.8% (Range of duty cycle)
SCG: FTL PWM > 96.5% (Range of duty cycle)
OL: FTL PWM < 2.7% (Range of duty cycle)
or
FTL PWM > 96.5% (Range of duty cycle)

TIME LENGTH AND FREQUENCY
Recurrence rate: 100 ms

Fan X Control Circuit Diagnosis
DTC
P0480 (Fan1) Refer to DTC P0480: Cooling Fan Relay 1 Control Circuit. P0480
P0481 (Fan2) Refer to DTC P0481: Cooling Fan Relay 1 Control Circuit. P0481

MONITOR STRATEGY DESCRIPTION
The purpose is to diagnose the signal from the driver which controls the cooling fan relay signal (low and high).
A global electronically controlled cooling fan error is set without debounce as soon as the diagnosis function is detecting an electrical cooling fan failure by one of the available cooling fan (s).

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Direct check by Hardware
Error-symptoms are defined to this diagnosis function as following:
Short circuit to V batt (SCB) (= SYM_0)
Short circuit to GND (SCG) (= SYM_1)
Open load (OC) (= SYM_2)
Fail Time = 10 ms

SECONDARY PARAMETERS AND ENABLE CONDITIONS
At every engine operating state
Ignition ON
10.968 V < Battery voltage < 16.046 V

TIME LENGTH AND FREQUENCY
Recurrence rate: 2 ms

Engine Idle Speed Diagnosis
DTC
P0507 Refer to DTC P0507: Idle Speed High. P0507
P0506 Refer to DTC P0506: Idle Speed Low. P0506

MONITOR STRATEGY DESCRIPTION
Engine speed deviation from the nominal engine speed is monitored when the vehicle is stopped and the throttle is settled after closing. If the difference to the nominal idle speed keeps too high or too low in spite of an activated idle speed controller, an idle speed control plausibility error is detected. For detailed information see anti bounce algorithm, respectively the generic error management.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
RPM > Calculated engine speed set point
+ 200 rpm
Time > 2 s
Fail Time > 3,000 ms
P0507 = Active
RPM < Calculated engine speed set point
+ 100 rpm
Time > 3 s
Fail Time > 3,000 ms
P0506 = Active

SECONDARY PARAMETERS AND ENABLE CONDITIONS
This diagnostic is inhibited if any of the following DTC's are present:
Crankshaft Sensor
TP
O2 upstream sensor
Ignition Coils
MAF
MAP
CPS
Vehicle speed
FSD
Magnetic wheel speed sensor
Miss fire
Injection Valve
Enable Conditions:
IGN = ON
Engine = Running
Throttle = Closed for a Time > 3 s
Vehicle Speed = 0
ECT > 80.25 degrees C
ECT < 105 degrees C
MAF < 240 mg/stk
LOW_CPS < 7.99 kg/h
10.968 V < Battery voltage < 16.046 V
Driving off assistance function is not active.
End of after-start function
Coolant temperature in operating range idle speed controller activation request Time delay for diagnosis activation = 0

TIME LENGTH AND FREQUENCY
Recurrence rate: 100 ms

A/C Compressor Clutch Relay Circuit Diagnosis
DTC
P0646 Refer to DTC P0646: Air Conditioning (A/C) Clutch Relay Control Circuit Low Voltage. P0646
P0647 Refer to DTC P0647: Air Conditioning (A/C) Clutch Relay Control Circuit High Voltage. P0647

MONITOR STRATEGY DESCRIPTION
The purpose is to diagnose the signal from the driver which controls the air condition relay signal. The diagnosis is only active if "Vehicle with ACC" is learnt.

MALFUNCTION CRITERIA AND THRESHOLD VALUE(S)
Direct check by Hardware.
Error-symptoms are defined to this diagnosis function as following:
Short circuit to V batt (SCB) (= SYM_0)
Short circuit to GND (SCG) (= SYM_1)
Open Line (OL) (= SYM_2)
Fail Time = 10 s

SECONDARY PARAMETERS AND ENABLE CONDITIONS
Enable Conditions:
ACC present

TIME LENGTH AND FREQUENCY
Recurrence rate: 2 s

Brake Switch "A" Circuit
DTC
P0571 Refer to DTC P0571: Brake Switch Circuit 1. P0571

MONITOR STRATEGY DESCRIPTION
Transition BLS/BTS diagnoses:
In principle both brake light switch and Brake test switch must be active at each braking. However there are vehicle versions in which the switching points of the two switches are not identical over the pedal distance. In these versions, BLS switches first, then BTS, i.e. the state is plausible if even improbable for a lengthy duration. A defective BTS is therefore detected by means of the following function. There are two possibilities to make this diagnosis. One is to check the fixed state of the BLS/BTS or to estimate the transitions of BLS/BTS.
BLS and BTS stationary diagnosis:
BTS switch before BLS over live time. For this part of diagnosis, it is a must be. You should never start this part of diagnosis if BLS/BTS can't fulfill this requirement.
Diagnosis of BLS and BTS with deceleration:
If a deceleration occurs which is bigger than a threshold the only possibility is that BLS/BTS are pressed.