Test A: The Convertible Top Does Not Raise/Lower
PINPOINT TEST A: THE CONVERTIBLE TOP DOES NOT RAISE/LOWERNormal Operation
The convertible top switch supplies a ground signal to the smart junction box (SJB) on circuit 2038 (LB/OG) when the convertible top switch is depressed to the lower position, or circuit 2052 (VT/OG) when the convertible top switch is depressed to the raise position. The convertible top system will not operate when the vehicle speed is greater than 5 km/h (3 mph) or if the ignition switch is in the START position. The convertible top hydraulic system uses a 12-volt reversible pump and motor assembly. When the SJB receives a request to operate the convertible top, the SJB sends a signal to the front and rear windows to lower the windows to the full down position. The SJB monitors the status of the rear windows on circuit 2012 (RD/BK) for the right rear window, and circuit 2014 (YE/LB) for the left rear window. When the SJB detects a full down signal from the RH and LH rear window motors, the convertible top operation is enabled. If the SJB does not detect a full down signal from the RH and LH rear window motors, the convertible top operation is disabled. When either the convertible top raise relay or the convertible top lower relay is activated, the other relay will remain in its normal state and supplies ground to the hydraulic motor and pump assembly. The convertible top raise and lower relay coils receive voltage at all times from SJB fuse 51 (10A). The convertible top raise and lower relay contacts receive voltage at all times from SJB fuse 13 (40A). When the convertible top switch is pressed to the lower position, and the SJB detects a full down signal from the LH and RH rear window motors, the SJB activates the convertible top lower relay by grounding circuit 1174 (WH/RD). When the convertible top lower relay is activated, voltage is supplied to the hydraulic motor and pump through circuit 902 (YE). Ground is supplied to the hydraulic motor and pump assembly through circuit 903 (RD). When the convertible top switch is pressed in the raise position, and the SJB detects a full down signal from the LH and RH rear window motors, the SJB activates the convertible top lower relay by grounding circuit 588 (VT). When the convertible top raise relay is activated, voltage is supplied to the hydraulic motor and pump assembly through circuit 903 (RD). Ground is supplied to the hydraulic motor and pump assembly through circuit 902 (YE).
The hydraulic motor/pump assembly is equipped with a thermal circuit breaker. In the event of a concern, the circuit breaker will reset after approximately 5 minutes. The thermal circuit breaker is integral to the hydraulic motor and pump assembly and cannot be serviced separately.
This pinpoint test is intended to diagnose the following:
- Bussed electrical center (BEC)
- Convertible top raise relay
- Convertible top lower relay
- Convertible top switch
- Fuse(s)
- Hydraulic motor and pump assembly
- LH or RH rear window motor
- SJB
- Wiring, terminals or connectors
A1-A6:
A6-A7:
A8-A10:
A11-A13:
A13-A14:
A14-A15:
A15-A17:
A17 Continued:
A18-A19:
A19-A20:
A20-A22:
A22-A24:
A24-A26:
A26-A27:
