Last Modified: 06-05-2026 6.11:8.1.0 Doc ID: RM100000001CPXT
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 -           ]
Title: METER / GAUGE / DISPLAY: LIGHT CONTROL RHEOSTAT: INSPECTION; 2019 - 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [06/2018 -        ]

INSPECTION

PROCEDURE

1. INSPECT LIGHT CONTROL RHEOSTAT

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection

Condition

Specified Condition

4 (RV) - 2 (E)

Light control rheostat knob fully downwards (MIN.)

Below 50 Ω

Light control rheostat knob between MIN. and MAX.

The value changes gradually (Between 0 to 12 kΩ)

Light control rheostat knob fully upwards (MAX.)

8 to 12 kΩ

3 (TC) - 2 (E)

Light control rheostat knob not fully upward

8 to 12 kΩ

Light control rheostat knob fully upwards (Tail cancel switch is on)

1 MΩ or higher

If the result is not as specified, replace the light control rheostat switch.

*a

Component without harness connected

(Light Control Rheostat Switch)

(b) Illumination Inspection

(1) Apply auxiliary battery voltage to the light control rheostat switch and check that it illuminates.

OK

Condition

Specified Condition

Auxiliary battery positive (+) → Terminal 6 (ILL+)

Auxiliary battery negative (-) → Terminal 1 (ILL-)

Illuminates

If the result is not as specified, replace the light control rheostat switch.

*a

Component without harness connected

(Light Control Rheostat Switch)