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Volume 3

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LOCATION:    11.3 Roadster Soft Top (RST), Roll Bar (RB) (Manual Deployment)   >   22 Electrical Test Program - Preparation for Test


Electrical Test Program - Preparation for Test

Preliminary work:
Diagnosis - Diagnostic Trouble Code (DTC) Memory 12

Battery voltage 11 - 14 Volts (always connect battery charger when working on the soft top).
Up to 9/95 fuses F1-f6, f8, F20-f1, f2, f3, f4 and f7 in order.
As of 9/95 fuses F1-f19, f20, F20-f1, f2, f3, f4, f7, f8 and f9 in order.
RB control module must release soft top for operation (indicator lamp in RB switch should not blink).
If soft top does not release, see impulse counter DTC or HHT .

Note regarding limit switch testing. Control module in diagnostic mode:
1. Ignition: OFF
2. Bridge sockets 1 and 3 of connector (X11/12) in passenger footwell see
23, Figure 1 (only necessary when testing with socket box).
3. Ignition: ON
4. Remove bridge.

IMPORTANT NOTE
The power soft top control module has 2 different connection possibilities. Therefore, a separation in the section "Test" is necessary.

Connect socket box according to connection diagram X1 ( 22, Figure 1): X1 .
Connect socket box according to connection diagram X2 ( 22, Figure 2): X2 .

Electrical wiring diagrams
See Electrical Troubleshooting Manual, Model 129, Volume 2.


Note regarding Testing with the HHT:
Actual values:
OPEN corresponds to 11 - 14 V.
CLOSE corresponds to 0 - 1 V.


As of 9/95
The RB control module (N53) is integrated into the power soft top control module (N52).
The hardtop locks front and rear simultaneously.
The DTC memory can only be read and erased with the HHT.

Danger of injury
When disconnecting the connector on the power soft top control module (N52) or when changing the position of control module N52, the roll bar is deployed!

Special Tools

Conventional tools, test equipment
Description Brand, model, etc.
Multimeter 1) Fluke models 23, 83, 85, 87
Battery charger 1) Local supply
1) Available through the MBUSA Standard Equipment Program.