Lexus IS250 IS220d GSE20 ALE20 - LIGHTING
REAR COMBINATION LIGHT ASSEMBLY - ON-VEHICLE INSPECTION
1. INSPECT REAR OUTER COMBINATION LIGHT ASSEMBLY |

Disconnect the connector from the rear outer combination light.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
- LH Side:
Tester Connection Condition Specified Condition Q50-2 (STP) - Q50-6 (E) Brake pedal released Below 1 V Q50-2 (STP) - Q50-6 (E) Brake pedal depressed 10 to 14 V Q50-3 (TL) - Q50-6 (E) Dimmer switch ON 10 to 14 V Q50-3 (TL) - Q50-6 (E) Dimmer switch OFF Below 1 V - RH Side:
Tester Connection Condition Specified Condition Q51-2 (STP) - Q51-6 (E) Brake pedal released Below 1 V Q51-2 (STP) - Q51-6 (E) Brake pedal depressed 10 to 14 V Q51-3 (TL) - Q51-6 (E) Dimmer switch ON 10 to 14 V Q51-3 (TL) - Q51-6 (E) Dimmer switch OFF Below 1 V
If the result is not as specified, repair or replace the wire harness or connector.
2. INSPECT REAR INNER COMBINATION LIGHT ASSEMBLY |

Disconnect the connector from the rear inner combination light.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
- LH Side:
Tester Connection Condition Specified Condition Q40-1 - Q40-3 Dimmer switch ON 10 to 14 V Q40-1 - Q40-3 Dimmer switch OFF Below 1 V - RH Side:
Tester Connection Condition Specified Condition Q46-1 - Q46-3 Dimmer switch ON 10 to 14 V Q46-1 - Q46-3 Dimmer switch OFF Below 1 V
If the result is not as specified, repair or replace the wire harness or connector.