|
No.
|
TECH 1 Display
|
Conditions for Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
|
04
|
SIM. FULL POS. SW
|
Ignition ON
Throttle valve CLOSED (accelerator pedal in idle position)
Actuate accelerator pedal slightly
Depress accierator pedal briefly to full load stop (full
throttle)
|
INACTIVE
INACTIVE
ACTIVE
|
21, 22
|
53, 12
30
|
|
|
Note:
In test steps 03 (SIM.
IDLE Pos. SW) and 04 (SIM. FULL
POS. SW), the Motronic control unit uses the throttle valve
potentiometer signal to calculate a simulation for the throttle valve switch
idle and full load contacts.
The Motronic control unit needs this information for the
idle air control (SIM. IDLE POS. SW)
and for the full load enrichment and oxygen sensor control cutoff (SIM. FULL POS. SW).
|
|
Notes on Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
|
|
|
· Ignition
ON
· Disconnect plug from throttle
valve potentiometer P 34
|
greater than 4.9 V
|
· ·Short
circuit between Ter. 3 (signal lead) and Ter. 1 (ground)
· Short
circuit to ground in lead from control unit K 61 / Ter. 53 to
throttle valve potentiometer
P 34 / Ter. 3
· Control
unit K 61 defective
|
|
|
· Bridge
Ter. 3 with Ter. 1 in throttle valve potentiometer plug
|
less than 0.1 V
|
· Lead
interruption from
- control
unit K 61 / Ter. 30 to throttle valve potentiometer Ter. 1
- control
unit K 61 / Ter. 53 to throttle valve potentiometer Ter. 3
· Control
unit K 61 defective
|
|
|
· Using
multimeter, measure voltage between Ter. 2 and Ter. 1 in throttle valve
potentiometer plug P 34
|
greater than 4.9 V
|
· Lead
interruption or short circuit to ground from control unit K 61 /
Ter. 12 to throttle valve
· potentiometer
plug P 34 / Ter. 2
· Throttle valve
potentiometer P 34 defective
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
