Inspection Procedure

1. Check the woofer speaker switch (See WOOFER SPEAKER SWITCH  ).

   OK: Woofer speaker switch is normal. 

NG: REPLACE WOOFER SPEAKER SWITCH 

OK: Go TO NEXT STEP 

1. Disconnect the E41 receiver connector.
2. Disconnect the E5 woofer speaker switch connector.
   Fig 1: Identifying Woofer Speaker Switch & Radio Receiver Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   E41-9 (AMP) - E5-3	Below 1 Ω
   E41-9 (AMP) or E5-3 - Body ground	10 kΩ or higher

4. Reconnect the receiver connector.
5. Reconnect the woofer speaker switch connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go TO NEXT STEP 

1. Disconnect the K4 woofer speaker connector.
2. Disconnect the E5 woofer speaker switch connector.
   Fig 2: Identifying Woofer Speaker Switch & Woofer Speaker Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   K4-9 (AMP+) - E5-4	Below 1 Ω
   K4-9 (AMP+) or E5-4 - Body ground	10 kΩ or higher

4. Reconnect the woofer speaker connector.
5. Reconnect the woofer speaker switch connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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