INSPECTION PROCEDURE 2: When Remote Controlled Radio Power Switch is Turned "ON," no Power is Available. But Radio, CD Player and CD Changer Power Switch is Available. < Vehicles with Seven Speakers>: Diagnosis
Required Special Tool:
- MB991223: Harness set
- STEP 1. Measure the voltage at remote controlled radio switch power supply circuit at the clock spring connector C-306.
- Disconnect the clock spring connector C-306.
- Turn the ignition switch to "ON" position.
- Measure the voltage between clock spring connector C-306 (radio, CD player and 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.
- STEP 2. Check radio, CD player and CD changer connector C-110 and clock spring connector C-306 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
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Q: Are radio, CD player and CD changer connector C-110 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.
- STEP 3. Check the wiring harness between clock spring connector C-306 (terminal 2) and radio, CD player and CD changer connector C-110 (terminal 5).
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Q: Is the wiring harness between radio, CD player and CD changer connector C-110 (terminal 5) 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.
- STEP 4. Measure the resistance at remote controlled radio switch ground circuit to the clock spring connector C-306.
- Disconnect the clock spring connector C-306.
- 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.
- STEP 5. Check radio, CD player and CD changer connector C-110 and clock spring connector C-306 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
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Q: Are radio, CD player and CD changer connector C-110 and clock spring connector C-306 in good condition?
- YES : Go to Step 6.
- NO : Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The remote controlled radio switch should work normally.
- STEP 6. Check the wiring harness between clock spring connector C-306 (terminal 3) and radio, CD player and CD changer connector C-110 (terminal 10).
Q: Is the wiring harness between clock spring connector C-306 (terminal 3) and radio, CD player and CD changer connector C-110 (terminal 10) in good condition?
- YES : Go to Step 7.
- NO : Repair the wiring harness. The remote controlled radio switch should work normally.
- STEP 7. Measure the resistance between the clock spring connector C-306 terminals.
- Disconnect the clock spring connector C-306.
- 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.Fig 14: Measuring Resistance Between Clock Spring Connector C-306 (Clock Spring Side) Terminals 2 And 3
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RESISTANCE REFERENCESWITCH POSITION MEASUREMENT VALUE (RH SIDE SWITCH) No push Approximately 24.0 kΩ Upper Approximately 5.3 kΩ Center Less than 2 ohms Lower Approximately 9.2 kΩ 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 MALFUNCTION .
- NO : Go to Step 8.
- STEP 8. Measure the resistance at clock spring terminal.
- Remove the clock spring (Refer to AIR BAG MODULE AND CLOCK SPRING < VEHICLES WITHOUT ADVANCED AIR BAG > or < VEHICLES WITH ADVANCED AIR BAG >.
- Measure the resistance at clock spring connectors C-303 and C-306.
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SPECIFIED CONDITIONCIRCUIT TO 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.
- STEP 9. Check the clock spring connector C-303 and switch (RH) connector C-301 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
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Q: Are clock spring connector C-303 and switch (RH) connector C-301 in good condition?
- YES : Go to step 10.
- NO : Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The remote controlled radio switch should work normally.
- STEP 10. Check the wiring harness between clock spring connector C-303 (terminals 4 and 5) and switch (RH) connector C-301 (terminals 1 and 2).
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Q: Is the wiring harness between clock spring connector C-303 (terminals 4 and 5) and 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.
- STEP 11. Measure the resistance at remote controlled radio switch (RH).
- Remove the airbag module (Refer to AIR BAG MODULE AND CLOCK SPRING < VEHICLES WITHOUT ADVANCED AIR BAG > or < VEHICLES WITH ADVANCED AIR BAG) >.
- Measure the resistance by operating the remote controlled radio switch (RH) in each position.
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RESISTANCE REFERENCESWITCH POSITION MEASUREMENT VALUE No push Approximately 24.0 kΩ Upper Approximately 6.8 kΩ Center Less than 2 ohms Lower Approximately 15.0 kΩ
Q: Are the resistance at the right remote controlled radio switch normal?
- YES : Replace the radio, CD player and CD changer.
- NO : Replace the remote controlled radio switch (RH).