| Test | TECH 1 | Notes | Nominal Values | Possible |
|---|---|---|---|---|
| Step | Display | Trouble | ||
| No. | Codes | |||
| 03 | MAP SENSOR | Ignition ON | 0.9 to 1.1 bar (13.05 | |
| -all engine- | 03 ... bar ... V | to 14.5 lbf/in²) / 4.7 to 5.1 V | 33, 34 | |
| (Value is dependent on altitude) | ||||
| Engine idling | C 13 N: 0.27 to 0.43 bar | |||
| (3.92 to 6.24 lbf/in²) 0.90 to 1.78 V | ||||
| C 16 LZ, C 16 NZ, E 16 NZ: | ||||
| 0.20 to 0.41 bar (2.95 to 5.95 | ||||
| lbf/in²) 0.52 to 1.70 V |
Trouble-Shooting: Nominal Value: Cause of Fault:
Ignition OFF
· Disconnect plug P 34 0.1 bar / 0 V · Short circuit betw. control unit cable K 57/Ter. C 14
to plug P 23/Ter. C and cable K 57/Ter. C 11
Remove intake manifold pressure plug P 23 to plug P 23/Ter. B.
Ignition ON · Control unit defective
Ignition OFF
· Short-circuit cables C 11 and C 14 to intake 0.9 to 1.1 bar · Short circuit betw. cable K 57/Ter. C 14 to
manifold pressure sensor plug Ter. B and C (13.05 to 14.5 lbf/in²)/ plug P 23/Ter. C or K 57/C 11 to
4.7 to 5.1 V plug P 23/Ter. B and ground cable K 57/
Ignition ON Ter. A 11 to plug P 23/Ter. A
· Cable interruption K 57/Ter. C 11 to plug P 23/Ter. B
· Cable interruption K 57/Ter. C 14 to plug P 23/Ter. C
· Short circuit in throttle valve potentiometer P 34
· Control unit defective
· With Multimeter check connection Continuity · Cable interruption
from plug K 57/Ter. A 11 to
plug P 23/Ter. A
· Connect vacuum pump KM-J-23994-8 0 bar (0 lbf/in²) · Intake manifold pressure sensor defective
to P 23. Set vacuum pressure at = 4.7 to 5.1 V
nominal value and after each change 0.2 bar (2.9 lbf/in²)
in pressure, switch ignition off = 3.5 to 3.9 V · Vacuum pressure hose to
and on again. 0.6 bar (8.7 lbf/in²) sensor is leaking or blocked
= 1.3 to 1.7 V
0.8 bar (11.6 lbf/in²)
= 0.3 to 0.7 V