Flex AWD V6-3.5L (2009)
Diagrams/Diagrams By Number
When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB), the high mounted stoplamp, the Trailer Brake
Control (TBC) module (if equipped), and the PCM through circuit CCB08 (VT/WH). When the SJB detects the brake pedal applied, the SJB provides
voltage to the LH and RH rear stoplamps through circuits CLS18 (GY/BN) and CLS19 (VT/OG), respectively. If equipped with trailer tow, voltage is
also supplied to the respective trailer tow stop/turn relay.
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DTC B1485 (Brake Pedal Input Short to Battery) - an on-demand DTC that sets when the SJB detects a short to voltage from the stoplamp switch
input circuit.
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DTC B2045 (Left Rear Stop Lamp Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage on the LH rear stop/turn
lamp voltage supply circuit.
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DTC B2047 (Right Rear Stop Lamp Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage on the RH rear stop/turn
lamp voltage supply circuit.
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
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Stoplamp switch
-
TBC module
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PCM
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SJB
PINPOINT TEST K: THE STOPLAMPS ARE ON CONTINUOUSLY
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K1 DETERMINE IF ALL THE STOPLAMPS ARE ILLUMINATED
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Ignition OFF.
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Observe the stoplamps with the brake pedal released.
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Are all of the stoplamps illuminated?
Yes
GO to K3.
No
GO to K2.
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K2 CHECK THE STOPLAMPS VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
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Disconnect: SJB C2280d.
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Do the stoplamps continue to illuminate?
Yes
REPAIR circuit CLS18 (GY/BN) (LH rear lamp) or circuit CLS19 (VT/OG) (RH rear lamp) for a short to voltage. CLEAR the DTCs. REPEAT the
self-test.
No
GO to K8.
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K3 CHECK THE STOPLAMP SWITCH
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Disconnect: Stoplamp Switch C278.
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Do the stoplamps continue to illuminate?
Yes
If equipped with a TBC module, GO to K4.
If not equipped with a TBC module, GO to K5