Inspection Procedure

INSPECT CLOCK ASSY

Remove the clock assy with the connector still connected.
Turn the ignition switch to ON.
Measure the voltage between terminal 20 (IG) of the clock assy connector and body ground.
Standard: 10 to 14 V
Measure the voltage between terminal 4 (SW1) of the clock assy connector and body ground.

Fig 1: Identifying Clock Assy Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

CLOCK ASSY - VOLTAGE TABLE

Condition	Voltage (V)
INFO switch is pressed	Below 1
INFO switch is not pressed	5
MODE/RSET switch is pressed	2.5
MODE/RSET switch is not pressed	5

OK: REPLACE CLOCK ASSY (See step 4 on REPLACEMENT )

NG: Go to next step

INSPECT STEERING PAD SWITCH

STEERING PAD SWITCH - RESISTANCE TABLE

Condition	Resistance
INFO switch is pressed	Below 2.5 Ω
INFO switch is not pressed	10 kΩ or higher
MODE/RSET switch is pressed	2.1 to 2.3 kΩ
MODE/RSET switch is not pressed	10 kΩ or higher

NG: REPAIR OR REPLACE STEERING PAD SWITCH

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR