Test O: The Stoplamps Are On Continuously

PINPOINT TEST O: THE STOPLAMPS ARE ON CONTINUOUSLY

O1:

O2-O7:

O8-O13:

Normal Operation - Vehicles Without Stability Assist
Each stoplamp is supplied battery voltage independently. The stoplamp ground circuits are independently controlled by the rear electronic module (REM). When the brake pedal is applied, the stoplamp switch allows voltage to flow through to circuit 29S-CF1 (OG/BU). Circuit 29S-CF1 (OG/BU) is spliced to carry the voltage to the powertrain control module (PCM) and the REM. Voltage to the REM (from the stoplamp switch) after the splice, is carried through circuit 29S-DK30 (OG). When the REM receives voltage from the stoplamp switch, the REM grounds circuits 31S-LG6 (BK/YE) (high mounted stoplamp), 31S-LG14 (BK/OG) (LH stoplamp) and 31S-LG21 (BK/GN) (RH stoplamp) to illuminate the stoplamps. The electric parking brake can also trigger the stoplamps by communicating to the REM (via the communication network) that the parking brake has been actuated while the vehicle is moving.

Normal Operation - Vehicles With Stability Assist
Each stoplamp is supplied battery voltage independently. The stoplamp ground circuits are independently controlled by the REM. When the brake pedal is applied, the stoplamp switch allows voltage to flow through circuit 29S-CF1 (OG/BU) to the anti-lock brake system (ABS) module. The ABS module then sends voltage through circuit 29S-CF2 (OG/BU), which is spliced to carry the voltage to the PCM and the REM. Voltage to the REM (from the ABS module) after the splice is carried through circuit 29S-DK30 (OG). When the REM receives voltage from the ABS module, the REM grounds circuits 31S-LG6 (BK/YE) (high mounted stoplamp), 31S-LG14 (BK/OG) (LH stoplamp) and 31S-LG21 (BK/GN) (RH stoplamp) to illuminate the stoplamps. The electric parking brake can also trigger the stoplamps by communicating to the REM (via the SCP link) that the parking brake has been actuated while the vehicle is moving.

Possible Causes
- Circuit 29S-CF1 (OG/BU) short to voltage
- Circuit 29S-CF2 (OG/BU) short to voltage
- Circuit 29S-CF58 (OG/GN) short to voltage
- Circuit 29S-DK30 (OG) short to voltage
- Circuit 29S-RE13 (OG) short to voltage
- Circuit 31S-LG6 (BK/YE) short to ground
- Circuit 31S-LG6A (BK/YE) short to ground
- Circuit 31S-LG6B (BK/YE) short to ground
- Circuit 31S-LG14 (BK/OG) short to ground
- Circuit 31S-LG21 (BK/GN) short to ground
- Stoplamp switch
- ABS module
- PCM
- REM
- Electric parking brake module