F0:Data List - Test Step 09 Engine Speed Opel Calibra I

F0:DATA LIST

No.

Trouble Codes

Engine running at idle speed, operating temperature

Note:

· In the Motronic M 2.7, trouble code 31 is always set when the ignition is switched ON. This code can either be displayed via TECH 1 or flashed out when the diagnostic plug is short circuited with KM-640 in switch position "B".

If the control unit receives engine speed signals from the inductive pulse pick-up on starting, trouble code 31 is automatically deleted and does not remain stored. If trouble code 31 is not cleared on starting, a malfunction is present and trouble-shooting should be carried out.

· Trouble code 19 is set only if there is a very brief interruption of the engine speed signal at engine speeds >2000rpm.

If the interruption is longer, and if the engine speed is <2000 rpm, the data stream from the control unit to TECH 1 is interrupted.

Test step 09 is divided into 3 parts

A) Engine does not start, trouble code 31 remains stored

B) Brief engine speed interruption, trouble code 19 may be stored

C) Engine speed deviates from nominal values, no trouble code stored

Notes for Trouble-shooting:

· Ignition OFF

· Check plug connection from inductive pulse pick-up to control unit

· Connect checking spark plug to lead 4 of ignition coil

· Start engine

Nominal Value:

Firm connection

Cause of Fault:

· Loose contact

· Corroded contacts

If no spark:

· Ignition coil L1 defective

· Lead interruption from

- Ignition coil L1 to trigger box K20

- Trigger box K20 to control unit K61/Ter.1

- Ignition coil to ignition distributor

- Ignition coil to Ter.15

· Control unit K61 defective

· Lead interruption from

- Pulse pick-up Ter.1 to control unit K61/Ter.49

· Check resistance in pulse pick-up plug P35/Ter.1 to Ter.2

· Check resistance in pulse pick-up plug P35/Ter.1 to Ter.3 and Ter.2 to Ter.3

0.5 to 0.8 kW

· Pulse pick-up P35 defective

· Short circuit from

- Pulse pick-up P35/Ter.1 to Ter.3

- Pulse pick-up P35/Ter.2 to Ter.3

· Segment disc/teeth corroded

· Metal shavings on pulse pick-up

B) Brief engine speed interruption, trouble code 19 may be stored

· as for A) trouble code 31

· Check shielding in inductive pulse pick-up P35/Ter.3 on control unit side to ground.

· Check that segment disc is firmly seated and undamaged

· As for A) trouble code 31

· Interference pulses in engine speed signal lead

· Segment disc loose, teeth damaged

· Exchange pulse pick-up

C) Engine speed deviates from nominal values, no trouble code stored

· See F0:DATA LIST, test step 23 and F5:ACTUATOR TEST, test step 06