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Test U

PINPOINT TEST U: ONE OR MORE PARKING, REAR OR LICENSE LAMP IS INOPERATIVE


Test U1:






Test U1-U2:






Test U2-U3:






Test U4-U6:






Normal Operation
Power is supplied to the LH front side marker and parking lamp through circuits 29S-LF3 (OG/YE), 29S-LF7 (OG/BU), 29S-LF8 (OG) and 29S-LF16 (OG/GN). Ground for the LH front side marker flows through circuit 31S-LF8 (BK/OG) to the front electronic module (FEM). Ground for the LH front parking lamp flows through circuit 31S-LF16 (BK/RD) and then through circuit 31S-LF7 (BK/BU) to the FEM. Power is supplied to the RH front side marker and parking lamp through circuits 29S-LF4 (OG/BU), 29S-LF17 (OG/WH) and 29S-LF16 (OG/GN). Ground for the RH front side marker flows through circuit 31S-LF17 (BK/WH) to the FEM. Ground for the RH front parking lamp flows through circuit 31S-LF16 (BK/RD) to the FEM. Power is supplied to the LH rear parking lamp through circuit 29S-LF23 (OG). Ground for the LH rear parking lamp flows through circuit 31S-LF11 (BK/WH) to the rear electronic module (REM). Power is supplied to the RH rear parking lamp through circuits 29S-LF24 (OG/BK), and 29S-LF23 (OG). Ground for the RH rear parking lamp flows through circuit 31S-LF11 (BK/WH) and then circuit 31S-LF20 (BK/OG) to the REM. Power is supplied to the license lamps through circuits 29S-LG2 (OG/BU), 29S-LF12 (OG/BK), 29S-LF21 (OG/BK) and 29S-LF22 (OG/BK). Ground for the license lamps flows through circuits 31S-LF21 (BK/GN) and 31S-LF22 (BK/GN) and then through circuit 31S-LF12 (BK/GN) to the REM. The FEM and REM control the ground circuits individually for the lamps (the license lamps share a common ground controlled circuit at the REM).

Possible Causes
- circuit 29S-LF8 (OG) open
- circuit 29S-LF16 (OG/GN) open
- circuit 31S-LF8 (BK/OG) open or short to power
- circuit 31S-LF16 (BK/RD) open or short to power
- circuit 31S-LF7 (BK/BU) open or short to power
- circuit 29S-LF17 (OG/WH) open
- circuit 31S-LF17 (BK/WH) open or short to power
- circuit 29S-LF23 (OG) open
- circuit 31S-LF11 (BK/WH) open or short to power
- circuit 31S-LF20 (BK/OG) open or short to power
- circuit 29S-LF21 (OG/BK) open
- circuit 29S-LF22 (OG/BK) open
- circuit 31S-LF12 (BK/GN) open or short to power
- REM
- FEM
- Headlamp
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