Inspection Procedure

NOTE: The vehicle is equipped with an SRS such as the airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the airbag system (see PRECAUTION ).

INSPECT STEERING PAD SWITCH ASSEMBLY
1. Inspect the steering pad switch (see INSPECTION ).
  OK: Steering pad switch is normal.
NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go TO NEXT STEP.

CHECK WIRE HARNESS (SPIRAL CABLE - RADIO RECEIVER)

Disconnect the E49 receiver connector.
Disconnect the E7 cable connector.

Fig 1: Identifying E49 & E7 Connectors Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E49-7 (SW1) - E7-6 (AU1)	Below 1 Ω
E49-8 (SW2) - E7-5 (AU2)	Below 1 Ω
E49-6 (SWG) - E7-4 (EAU)	Below 1 Ω
E49-7 (SW1) - Body ground	10 kΩ or higher
E49-8 (SW2) - Body ground	10 kΩ or higher
E49-6 (SWG) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go TO NEXT STEP.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Disconnect the cable connectors.

Measure the resistance of the cable.

Fig 2: Inspecting Spiral Cable Sub-Assembly

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E7-4 (EAU) - 8 (EAU)	Below 1 Ω
E7-6 (AU1) - 10 (AU1)	Below 1 Ω
E7-5 (AU2) - 9 (AU2)	Below 1 Ω

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK: PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE