Pinpoint Test J: DTCs B1141/B1142 - Convertible Top Full Down/Up Position Switch Circuit Failure
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test J: DTCs B1141/B1142 - Convertible Top Full Down/Up Position Switch Circuit Failure
Refer to Wiring Diagram Set 103, Convertible Top for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) monitors the status of the convertible top through circuits 1558 (TN/BK) and 700 (WH/VT). When the convertible top is in the full UP position, the convertible top ajar switch closes and provides ground to circuit 1558 (TN/BK). When the convertible top is in the full DOWN position, the convertible top ajar switch closes and provides ground to circuit 700 (WH/VT). Ground is provided to the convertible top ajar switch through circuit 1205 (BK). DTC B1141 sets if the convertible top ajar switch on-demand self test is run with the convertible top not in the full DOWN position. DTC B1142 sets if the convertible top ajar switch on-demand self test is run with the convertible top in the full UP position. If DTC B1141 or B1142 is present, the rear quarter windows may still function during convertible top operation, but will not function when commanded by the window control switch.
- B1141 Convertible Top Full Down Position Switch Circuit Failure - Open or short to battery.
- B1142 Convertible Top Full Up Position Switch Circuit Failure - Open or short to ground.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals and connectors
- Convertible top ajar switch
- SJB
PINPOINT TEST J: DTCs B1141/B1142 - CONVERTIBLE TOP FULL DOWN/UP POSITION SWITCH CIRCUIT FAILURE
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J1 CARRY OUT THE ON-DEMAND SELF TEST FOR THE CONVERTIBLE TOP AJAR SWITCH
NOTE: False DTCs will set if the convertible top is not in the full DOWN position before carrying out this test.
- Connect the scan tool.
- Ignition ON.
- With the convertible top and the rear windows in the full DOWN position, carry out the on-demand self test for the SJB.
- Does DTC B1141 or DTC B1142 set as current?
Yes
GO to J2.
No
The concern is not present at this time. RETURN the vehicle to the customer.
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J2 CHECK THE CONVERTIBLE TOP AJAR SWITCH OPERATION
- Ignition OFF.
- Disconnect: Convertible Top Ajar Switch C3266.
- Measure the resistance between convertible top ajar switch C3226-1, circuit 1588 (TN/BK), component side and convertible top ajar switch C3266-3, circuit 1205 (BK), component side, with convertible top in the full UP position; and between convertible top ajar switch C3226-2, circuit 700 (WH/VT), component side and convertible top ajar switch C3266-3, circuit 1205 (BK), component side, with convertible top in the full DOWN position.
- Are the resistances less than 20 ohms?
Yes
GO to J3.
No
INSTALL a new convertible top ajar switch. CLEAR the DTCs. REPEAT the self-test.
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J3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
- Measure the resistance between convertible top ajar switch C3266-3, circuit 1205 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to J4.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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J4 CHECK CIRCUITS 700 (WH/VT) AND 1558 (TN/BK) FOR A SHORT TO VOLTAGE
- Disconnect: SJB C2280C.
- Ignition ON.
- Measure the voltage between convertible top ajar switch C3266-2, circuit 700 (WH/VT), harness side and ground; and between convertible top ajar switch C3266-1, circuit 1558 (TN/BK), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
No
GO to J5.
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J5 CHECK CIRCUITS 700 (WH/VT) AND 1558 (TN/BK) FOR A SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between convertible top ajar switch C3266-1, circuit 1558 (TN/BK), harness side and ground; and between convertible top ajar switch C3266-2, circuit 700 (WH/VT), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to J6.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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J6 CHECK CIRCUITS 700 (WH/VT) AND 1558 (TN/BK) FOR AN OPEN
- Measure the resistance between SJB C2280C, harness side and convertible top ajar switch C3266, harness side using the following chart:
- Are the resistances less than 5 ohms?
Yes
GO to J7.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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J7 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new SJB. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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