STEERING WHEEL VOICE CONTROL SWITCH CHECK
Switch position
 Tester connection
 Resistance
SPEECH switch pushed
 1 - 2
 Approximately 4.6 kΩ
OFF HOOK switch pushed
 Approximately 6.3 kΩ
ON HOOK switch pushed
 Approximately 8.6 kΩ

ILLUMINATION CHECK
Apply the battery voltage to the connector terminal No. 3, earth the terminal No. 4, and then check that the illumination lights up.