Description (page 6 of 9)

ENGINE MANAGEMENT SYSTEM - SIEMENS

DESCRIPTION AND OPERATION 18-4-37

1565

Cruise control interface ECU

MFL signal switch state 

implausible, circuit high voltage

No

No

—

1566

Cruise control interface ECU

MFL signal period time error, 

circuit low voltage

No

No

—

1567

Cruise control interface ECU

MFL signal SET/+ switch state 

implausible

No

No

A

1569

Cruise control interface ECU

MFL signal time out

No

No

A

1572

Brake pedal sensor

BLS signal defective or BTS 

signal active

No

No

—

1573

Brake pedal sensor

BTS signal defective

No

No

—

1574

Brake pedal sensor

Signals implausible

No

No

A

1575

Brake pedal sensor

APP sensor to brake sensor 

inputs implausible

No

Yes

B

1576

Brake pedal sensor

APP sensor to brake sensor 

inputs high

No

No

B

1577

Brake pedal sensor

APP sensor to brake sensor 

inputs low

No

No

B

1621

Serial link with 

immobilisation ECU

Timeout

No

No

A

1624

Serial link with 

immobilisation ECU

Code not accepted

No

No

A

1625

ECM, throttle monitoring/ self 

test

Internal fault

Yes

Yes

A

1626

ECM, throttle monitoring/ self 

test

Engine torque monitoring 

problem

Yes

Yes

B

1627

ECM, throttle monitoring/ self 

test

Engine speed monitoring problem

Yes

Yes

B

1628

ECM, throttle monitoring/ self 

test

PWM signal 1 duty cycle 

threshold exceeded for <1 

second

Yes

No

B

1629

ECM, throttle monitoring/ self 

test

PWM signal 2 duty cycle 

threshold exceeded for >1 

second

Yes

Yes

B

1630

ECM, throttle monitoring/ self 

test

Throttle position control deviation

Yes

Yes

B

1631

Throttle

Motor power stage fault

Yes

Yes

A

1636

ECM, throttle monitoring/ self 

test

Throttle motor adaption not 

completed

Yes

Yes

A

1637

ECM, throttle monitoring/ self 

test

Throttle motor lower adaption not 

plausible

Yes

Yes

A

1638

ECM, throttle monitoring/ self 

test

Throttle motor upper adaption not 

plausible

Yes

Yes

A

1639

ECM, throttle monitoring/ self 

test

Throttle motor spring test not 

completed

Yes

Yes

A

1641

CAN bus

Bus off

No

No

—

1645

CAN bus link with ABS ECU

Timed out

No

No

A

1646

CAN bus link with EAT ECU

Timed out

Yes

No

A

1647

CAN bus link with instrument 

pack

Timed out

No

No

A

1666

Serial link with 

immobilisation ECU

Wrong code

No

No

A

1669

ECM cooling fan signal

Open circuit or short to battery

No

No

A

1670

ECM cooling fan signal

Open circuit

No

No

A

P Code No.

Component/Signal

Fault Description

Warning Lamp

Drive Cycle

SERVICE 

ENGINE 

(MIL)

SERVICE 

ENGINE 

SOON