F0: DATA LIST
| No. | TECH 1 Display | |||
|---|---|---|---|---|
| Checking Conditions | Norminal Value | Trouble Code | Terminal | |
| 13 | ACCELERAT. PHASE | Engine at idle speed, operating temperature |
Accelerate briefly, engine speed briefly >2000rpm
Pre-throttle valve must move briefly in closing direction (enriches)
(See F5:Actuator Test)
INACTIVE
| ACTIVE |
21, 22, 56
| 57, 58 |
|---|
| - |
Note: Acceleration is started by opening the throttle valve and simultaneously closing the pre-throttle (mixture enrichement).
The closing of the pre-throttle can be clearly observed during acceleration when the air cleaner is removed. TECH 1 reads out the internal control unit information for acceleration enrichment "ACTlVE" or "INACTIVE" (value for comprehension of the system).
Notes on Trouble-shooting:
| Norminal Value: |
|---|
| Cause of Fault: |
· Ignition OFF
Using ohmmeter, check pre-throttle adjuster plug (Ter.1) to control unit plug (Ter.14)
Pre-throttle adjuster plug (Ter.2) to control unit plug (Ter.15)
| Check inner resistance to contacts of pre-throttle adjuster |
0 W
0 W
| 0.9 to 1.7 W |
· Lead interruption
· Lead interruption
· Replace pre-throttle adjuster
| Check contacts of pre-throttle adjuster to vehicle ground (insulation resistance) |
|---|
| ¥W |
· Replace pre-throttle adjuster
· Short circuit in lead connections
· Control unit defectiye
· Pre-throttle valve stiff