Daytime running lights (vehicles after 08.2001) — Pinpoint tests

D1: CHECK LOW BEAM

1 Drive the ON position.

2 Turn on the low beam headlights.

3 Check the low beam headlights.

• Is the dipped beam on?

→ Yes

Go to D2

→ No

Section 417-01 Headlights,

D2: DETERMINING VEHICLE EQUIPMENT

1 Determine the equipment of the car.

• Does the car have regular headlights?

→ Yes

Go to D3

→ No

Xenon headlights: Go to D9

D3: FUSE CHECK F25 (BJB)

1 Enter the OFF position.

2CHECK Fuse F25 (BJB).

3 Check fuse F25 (20 A)

• Is the fuse good?

→ Yes

Go to D4

→ No

INSTALL a new fuse F25 (20 A) and TEST the system. If the fuse blows again, LOCATE and REPAIR the short circuit using the wiring diagrams. CHECK the system is working properly.

D4: CHECK THE ELECTRICAL POWER CIRCUIT OF THE F25 FUSE (BJB)

1 Connect Fuse F25 (BJB).

2 Drive the ON position.

3 Measure voltage between fuse F25 (BJB) and "mass".

• Does the battery voltage register?

→ Yes

Go to D5

→ No

REPAIR open circuit 30-DC25 using the wiring diagrams (red), between splice S102 (battery powered) and fuse F25. CHECK the system is working properly.

D5: DAYTIME HEADLAMP RELAY POWER SUPPLY CHECK (DRL)

1 Enter the OFF position.

2 Disconnect the C1012 daytime running lamp relay (DRL).

3 Measure the voltage between pin 5 of connector C1012, daytime running lamp relay (DRL), electrical circuit 30-LE8 (red), from the BJB side, and "mass".

• Does the battery voltage register?

→ Yes

Go to D6

→ No

REPAIR open circuit 30-LE8 using the wiring diagrams (red) (DTRL resistor wire) between fuse F25 and the daytime running lamp relay (DRL) CHECK the system is working properly.

D6: DAYTIME HEADLAMP RELAY CONTROL ELECTRICAL CIRCUIT CHECK (DRL)

1 Drive the ON position.

2 Measure the voltage between pin 1 of connector C1012 of the daytime running lamp relay (DRL), electrical circuit 15S-LE6 (yellow-green), from the BJB side, and "mass".

• Does the battery voltage register?

→ Yes

Go to D7

→ No

Go to D8

D7: DAYLIGHT RELAY GROUND ELECTRICAL CHECK (DRL)

1 Enter the OFF position.

2 Measure the resistance between pin 2 of the C1012 connector of the daytime running lamp relay (DRL), electrical circuit 91-LE6 (black and yellow), from the BJB side, and "mass".

• Is the resistance less than 2 ohms?

→ Yes

INSTALL a new daytime running lamp relay (DRL). CHECK the system is working properly.

→ No

REPAIR open circuit 91-LE6 using the wiring diagrams (black and yellow) between the daytime running lamp relay (DRL) and splice S118 (earth point G1). CHECK the system is working properly.

D8: LIGHT SWITCH TEST (VEHICLES WITH CONVENTIONAL HEADLIGHTS)

1 Enter the OFF position.

2 Connect C1012 daytime running lamp relay (DRL).

3 Disconnect the C320 light switch.

4 Install fusible jumper wire (20 A) into connector C320 of the light switch, between pin 4, circuit 15S-LE14 (red-green), and pin 8, electrical circuit 15-LE29 (black and green), from the side of the electrical wiring.

5 Drive the ON position.

6 Check the low beam headlights.

• low beam headlights (DRL) burning?

→ Yes

INSTALL a new light switch. CHECK the system is working properly.

→ No

LOCATE and REPAIR open circuit 15S-LE14 using the wiring diagrams (A) (red-green) and accordingly 15S-LE6 (A) (yellow-green) between light switch and daytime running lamp relay (DRL). CHECK the system is working properly.

D9: LIGHT SWITCH TEST (VEHICLES WITH XENON HEADLIGHTS)

1 Enter the OFF position.

2 Disconnect the C320 light switch.

3 Connect C1012 daytime running lamp relay (DRL).

4 Install fusible jumper wire (20 A) into connector C320 of the light switch, between pin 4, circuit 15S-LE14 (red-green) and pin 8, electrical circuit 15-LE29 (black and green), from the side of the electrical wiring.

5 Drive the ON position.

6 Check the low beam headlights.

• Low beam headlights (DRL) burning?

→ Yes

INSTALL a new light switch. CHECK the system is working properly.

→ No

LOCATE and REPAIR open circuit 15S-LE14 using the wiring diagrams (red-green) between the light switch and the DTRL connector of connector C907 and respectively in circuit 15S-LE29B (black and green) between pin 2 and pin 4 of connector C907 (connector DTRL). CHECK the system is working properly.

E1: CHECK FAULTY STATUS

1 Enter the OFF position.

2 Disconnect the C1012 daytime running lamp relay (DRL).

3 Check the low beam headlights.

• Are the low beam headlights constantly on?

→ Yes

Section 417-01 Headlights,

→ No

Go to E2

E2: DAYTIME HEADLAMP RELAY CONTROL ELECTRICAL CIRCUIT TEST (DRL) FOR A SHORT CIRCUIT IN THE ELECTRICAL POWER CIRCUIT

1 Measure the voltage at connector C1012 of the daytime running lamp relay (DRL) between pin 1, electrical circuit 15S-LE6 (yellow-green), and pin 2, electrical circuit 91-LE6 (black and yellow), by BJB.

• Does the battery voltage register?

→ Yes

Go to E3

→ No

CHECK the daytime running lamp relay (DRL), acting in accordance with the description given in Ch. "Element Check" attached to the wiring diagrams; INSTALL a new one if necessary. If the relay is OK, Section 417-01, Headlights.

E3: DETERMINING THE PRESENCE OF A SHORT CIRCUIT IN THE ELECTRICAL POWER CIRCUIT

1 Connect C1012 daytime running lamp relay (DRL).

2 Disconnect Fuse F59 (CJB).

3 Check the low beam headlights.

• Low beam headlights (DRL) constantly on fire?

→ Yes

Go to E5

→ No

Go to E4

E4: IGNITION SWITCH TEST

1 Connect Fuse F59 (CJB).

2 Disconnect the C456 ignition switch.

3 Check the low beam headlights.

• Low beam headlights (DRL) constantly on fire?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR short to power in circuit between ignition switch and fuse F59 (CJB). If necessary, INSTALL a new CJB. CHECK the system is working properly.

→ No

Install a new ignition switch. CHECK the system is working properly.

E5: DETERMINING THE PRESENCE OF A SHORT CIRCUIT IN THE ELECTRICAL POWER CIRCUIT

1 Disconnect the C320 light switch.

2Check low beam headlights.

• Low beam headlights (DRL) constantly on fire?

→ Yes

Vehicles with conventional headlights: Using the wiring diagrams, LOCATE and REPAIR short to power in circuit 15S-LE6 (A) (yellow-green) and respectively 15S-LE14 (A) (red-green) between the daytime running lamp relay (DRL) and light switch. CHECK the system is working properly.

Vehicles with xenon headlights, with DTRL: Go to E7

Vehicles with xenon headlights, without DTRL: Section 417-01, Headlights.

→ No

Go to E6

E6: CHECK LIGHT SWITCH CIRCUIT FOR SHORT TO POWER CIRCUIT

1 Measure the voltage between pin 8 of connector C320, light switch, circuit 15-LE29 (black and green), from the wiring side, and "ground".

• Does the battery voltage register?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR short to power in the circuit between fuse F59 (CJB) light switch and multifunction switch. If necessary, INSTALL a new CJB.. CHECK the system is working properly.

→ No

INSTALL a new light switch. CHECK the system is working properly.

E7: DETERMINING THE PRESENCE OF A SHORT CIRCUIT TO THE ELECTRICAL POWER CIRCUIT

1 Disconnect C907 daytime running lamp connector (DTRL).

2Check low beam headlights.

• Low beam headlights (DRL) constantly on fire?

→ Yes

Section 417-01 Headlights,

→ No

Parking lights do not illuminate: Using the wiring diagrams, LOCATE and REPAIR short to power in circuit 15S-LE14 (red-green) and respectively 15S-LE29 (black and green) between the light switch and connector C907 of the DTRL connector. CHECK the system is working properly.

Side Lights Illuminated: Section 417-01, Side Lights, Tail Lights, and Illumination Lamps.

F1: DEFINING STATE

1 Turn on the SIDE LIGHTS.

2 Check the parking lights.

• Are the marker lights on?

→ Yes

Go to F2

→ No

Section 417-01 Marker Lights, Tail Lights, and License Plate Lamps

F2: 15S-LE29 ELECTRICAL CIRCUIT CHECK (BLACK GREEN) LIGHT SWITCH FOR BREAK

1 Enter the OFF position.

2 Disconnect the C320 light switch.

3 Drive the ON position.

4 Measure the resistance at light switch connector C320 between pin 15, circuit 15S-LE29 (black and green), and pin 4, electric circuit 15S-LE14 (red-green), from the side of the electrical wiring.

• Is the resistance less than 2 ohms?

→ Yes

INSTALL a new light switch. CHECK the system is working properly.

→ No

REPAIR open circuit 15S-LE29 using the wiring diagrams (black and green) and respectively 15S-LE14A (red-green) between connector C906 of the DTRL connector (and respectively C907, with xenon headlights) and light switch. CHECK the system is working properly.