INSPECTION PROCEDURE 2: Remote controlled radio switch: When remote controlled radio power switch is turned "ON," no power is available. But radio and CD player with CD changer power switch is available. < Vehicles with audio amplifier>: Diagnosis

Required Special Tools: 

• MB991223: Harness set
• MB992006: Extra Fine Probe

1. STEP 1. Measure the voltage at remote controlled radio switch power supply circuit at the clock spring connector C-306. 
   1. Disconnect the clock spring connector C-306.
   2. Turn the ignition switch to "ON" position.
      Fig 1: Identifying Connector C-306 Terminals

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   3. Measure the voltage between clock spring connector C-306 (radio and CD player with CD changer side) terminal 2 and ground.
      • The measured value should be approximately 5 volts.

   Q: Is the measured voltage approximately 5 volts? 

   YES:  Go to Step  4.

   NO:  Go to Step  2.

   Fig 2: Measuring Voltage Between Clock Spring Connector C-306 Terminal 2 And Ground

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2. STEP 2. Check radio and CD player with CD changer connector C-119 and clock spring connector C-306 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are radio and CD player with CD changer connector C-119 and clock spring connector C-306 in good condition? 

   YES:  Go to Step  3.

   NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The remote controlled radio switch should work normally.

   Fig 3: Locating CD Changer Connector C-119

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   Fig 4: Locating Clock Spring Connector C-306

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3. STEP 3. Check the wiring harness between radio and CD player with CD changer connector C-119 (terminal 31) and clock spring connector C-306 (terminal 2). 

   Q: Is the wiring harness between radio and CD player with CD changer connector C-119 (terminal 31) and clock spring connector C-306 (terminal 2) in good condition? 

   YES:  Go to Step  4.

   NO:  Repair the wiring harness. The remote controlled radio switch should work normally.

   Fig 5: Locating CD Changer Connector C-119

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   Fig 6: Identifying Connector C-306 Terminals

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4. STEP 4. Measure the resistance at remote controlled radio switch ground circuit to the clock spring connector C-306. 
   1. Disconnect the clock spring connector C-306.
      Fig 7: Identifying Connector C-306 Terminals

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   2. Measure resistance between terminal 3 and ground.
      • The measured value should be 2 ohm or less.

   Q: Is the measured resistance 2 ohms or less? 

   YES:  Go to Step  7.

   NO:  Go to Step  5.

   Fig 8: Measuring Resistance Between Terminal 3 And Ground

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5. STEP 5. Check radio and CD player with CD changer connector C-119 and clock spring connector C-306 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are radio and CD player with CD changer connector C-119 and clock spring connector C-306 in good condition? 

   YES:  Go to Step  6.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The remote controlled radio switch should work normally.

   Fig 9: Locating CD Changer Connector C-119

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   Fig 10: Identifying Connector C-306 Terminals

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6. STEP 6. Check the wiring harness between radio and CD player with CD changer connector C-119 (terminal 42) and clock spring connector C-306 (terminal 3). 

   Q: Is the wiring harness between radio and CD player with CD changer connector C-119 (terminal 42) and clock spring connector C-306 (terminal 3) in good condition? 

   YES:  Go to Step  7.

   NO:  Repair the wiring harness. The remote controlled radio switch should work normally.

   Fig 11: Locating CD Changer Connector C-119

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   Fig 12: Identifying Connector C-306 Terminals

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7. STEP 7. Measure the resistance between the clock spring connector C-306 terminals. 
   1. Disconnect the clock spring connector C-306.
      Fig 13: Identifying Connector C-306 Terminals

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   2. Measure the resistance between clock spring connector C-306 (clock spring side) terminals 2 and 3. Operate the right and left remote controlled radio switches, and check that the table below is satisfied.
   RESISTANCE SPECIFICATION
   
   

   SWITCH POSITION	MEASUREMENT VALUE (RH SIDE SWITCH)
   Not pushed	Approximately 24.0 kΩ
   Upper	Approximately 5.3 kΩ
   Center	Less than 2 ohms
   Lower	Approximately 9.2 kΩ

   Fig 14: Measuring Resistance Between Clock Spring Connector C-306 Terminals 2 And 3

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   NOTE: When checking the right remote controlled radio switch, do not operate the left remote controlled radio switch.

   Q: Is the resistance between terminals 2 and 3 normal? 

   YES:  This malfunction is intermittent. Refer to "How to Use Troubleshooting/inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTIONS " .

   NO:  Go to Step  8.

8. STEP 8. Measure the resistance at clock spring terminal. 
   1. Remove the clock spring (Refer to AIR BAG MODULE(S) AND CLOCK SPRING ).
      Fig 15: Locating Clock Spring Connectors C-303 And C-306

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   2. Measure the resistance at clock spring connectors C-303 and C-306.
   TERMINALS CONTINUITY REFERENCE CHART
   
   

   CIRCUIT BE MEASURED	CONNECTOR (TERMINAL) TO BE CHECKED	SPECIFIED CONDITION
   Power supply circuit	C-303 (terminal 5) - C-306 (terminal 2)	Less than 2 ohms
   Ground circuit	C-303 (terminal 4) - C-306 (terminal 3)	less than 2 ohms

   Q: Is the measured resistance 2 ohms or less? 

   YES:  Go to Step  9.

   NO:  Replace the clock spring.

   Fig 16: Measuring Resistance Between Clock Spring Connectors C-303 And C-306 Terminals

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9. STEP 9. Check the clock spring connector C-303 and remote controlled radio switch (RH) connector C-301 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are clock spring connector C-303 and remote controlled radio switch (RH) connector C-301 in good condition? 

   YES:  Go to Step  10.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The remote controlled radio switch should work normally.

   Fig 17: Locating Clock Spring Connector C-303 And Remote Controlled Radio Switch (RH) Connector C-301

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10. STEP 10. Check the wiring harness between clock spring connector C-303 (terminals 4 and 5) and remote controlled radio switch (RH) connector C-301 (terminals 1 and 2). 

    Q: Is the wiring harness between clock spring connector C-303 (terminals 4 and 5) and remote controlled radio switch (RH) connector C-301 (terminals 1 and 2) in good condition? 

    YES:  Go to Step  11.

    NO:  Repair the wiring harness. The remote controlled radio switch should work normally.

    Fig 18: Locating Clock Spring Connector C-303 And Remote Controlled Radio Switch (RH) Connector C-301

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11. STEP 11. Measure the resistance at remote controlled radio switch (RH). 
    1. Remove the airbag module assembly (Refer to AIR BAG MODULE(S) AND CLOCK SPRING ).
    2. Measure the resistance by operating the remote controlled radio switch (RH) in each position.
    RESISTANCE SPECIFICATION
    
    

    SWITCH POSITION	MEASUREMENT VALUE
    Not pushed	Approximately 24.0 kΩ
    Upper	Approximately 5.3 kΩ
    Center	Less than 2 ohms
    Lower	Approximately 9.2 kΩ

    Q: Are the resistance at the right remote controlled radio switch normal? 

    YES:  Replace the radio and CD player with CD changer.

    NO:  Replace the remote controlled radio switch (RH).

    Fig 19: Measuring Resistance Between Remote Controlled Radio Switch Terminals (RH)

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