Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GTRJ
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 -           ]
Title: LIGHTING (EXT): SWITCH HOUSING: INSPECTION; 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]

INSPECTION

PROCEDURE

1. INSPECT STEERING WHEEL SWITCH HOUSING

*a

Component without harness connected

(Steering Wheel Switch Housing)

-

-

(a) Resistance Check

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

Standard Resistance:

Light Switch Circuit

Tester Connection

Condition

Specified Condition

*1: w/ Light Control Switch OFF Position

*2: w/ Light Control Switch DRL OFF Position

*3: w/ Front Fog Light

z19-2 (L_OFF) - z17-2 (L_OFF)*1

Always

Below 1 Ω

z19-2 (L_OFF) - z17-2 (L_OFF)*2

Always

Below 1 Ω

z19-14 (T) - z17-3 (T)

Always

Below 1 Ω

z19-5 (H) - z17-4 (H)

Always

Below 1 Ω

z19-10 (A) - z17-5 (A)

Always

Below 1 Ω

z19-1 (HU) - z17-6 (HU)

Always

Below 1 Ω

z19-6 (HF) - z17-7 (HF)

Always

Below 1 Ω

z19-9 (TR) - z17-8 (TR)

Always

Below 1 Ω

z19-3 (TL) - z17-9 (TL)

Always

Below 1 Ω

z19-11 (CR) - z17-10 (CR)

Always

Below 1 Ω

z19-4 (BFG) - z17-11 (BFG)*3

Always

Below 1 Ω

z19-12 (EL) - z17-13 (EL)

Always

Below 1 Ω

Wiper Switch Circuit

Tester Connection

Condition

Specified Condition

*1: w/ Rear wiper

z18-10 (W_OFF) - z17-24 (W_OFF)

Always

Below 1 Ω

z18-13 (+S) - z17-25 (+S)

Always

Below 1 Ω

z18-11 (+1) - z17-26 (+1)

Always

Below 1 Ω

z18-12 (+2) - z17-27 (+2)

Always

Below 1 Ω

z18-14 (MIST) - z17-28 (MIST)

Always

Below 1 Ω

z18-7 (C1R) - z17-29 (C1R)*1

Always

Below 1 Ω

z18-6 (+1R) - z17-30 (+1R)*1

Always

Below 1 Ω

z18-15 (WF) - z17-31 (WF)

Always

Below 1 Ω

z18-9 (WR) - z17-32 (WR)

Always

Below 1 Ω

z18-5 (E) - z17-33 (E)

Always

Below 1 Ω

z18-4 (VR) - z17-34 (VR)

Always

Below 1 Ω

If the result is not as specified, replace the steering wheel switch housing.