Inspection Procedure 1: When power switch is turned "ON," no power is available. <Vehicle with AS&G System>






COMMENT ON TROUBLE SYMPTOM


The cause is probably a faulty radio with CD player power supply circuit system.

PROBABLE CAUSES



  • Damaged wiring harness or connector.
  • Malfunction of the radio with CD player.
  • Malfunction of the capacitor unit.

DIAGNOSIS PROCEDURE


STEP 1. Connector check: radio with CD player connector B-15.




Q. Is radio with CD player connector B-15 in good condition?

Go to Step 2.

Repair or replace the damage component(s).

STEP 2. Check the wiring harness between radio with CD player connector B-15 (terminal 41) and earth.



  • Check the earth line for open circuit.


Q. Are the wiring harnesses between radio with CD player connector B-15 (terminal 41) and earth in good condition?

Go to Step 3.

Repair the wiring harness.

STEP 3. Connector check: radio with CD player connector B-13.




Q. Is radio with CD player connector B-13 in good condition?

Go to Step 4.

Repair or replace the damage component(s).

STEP 4. Measure the voltage at radio with CD player connector B-13.




(1)Disconnect radio with CD player connector B-13, and measure at the wiring harness side.

(2)Measure the voltage between terminal 11 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 6.

Go to Step 5.

STEP 5. Check the wiring harness between radio with CD player connector B-13 (terminal 11) and fusible link (1).





  • Check the power supply line (battery power supply) for open circuit and short circuit.




note Prior to the wiring harness inspection, check junction block connector B-208 and B-231, and joint connector connectors B-24, and repair if necessary.

Q. Is the wiring harness between radio with CD player connector B-13 (terminal 11) and fusible link (1) in good condition?

Go to Step 15.

Repair or replace the damage component(s).

STEP 6. Measure the voltage at radio with CD player connector B-13.




(1)Disconnect radio with CD player connector B-13, and measure at the wiring harness side.
(2)Turn the ignition switch to "ACC" position.

(3)Measure the voltage between terminal 10 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 15.

Go to Step 7.

STEP 7. Connect check: capacitor unit connector C-40.




Q. Is capacitor unit connector C-40 in good condition?

Go to Step 8.

Repair or replace the damage component(s).

STEP 8. Check the wiring harness between radio with CD player connector B-13 (terminal 10) and capacitor unit connector C-40 (terminal 3).







  • Check the power supply line (battery power supply) for open circuit and short circuit.

Q. Is the wiring harness between radio with CD player connector B-13 (terminal 10) and capacitor unit connector C-40 (terminal 3) in good condition?

Go to Step 9.

Repair or replace the damage component(s).

STEP 9. Check the wiring harness between capacitor unit connector C-40 (terminal 2) and earth.





  • Check the earth line for open circuit.

Q. Are the wiring harnesses between capacitor unit connector C-40 (terminal 2) and earth in good condition?

Go to Step 10.

Repair or replace the damage component(s).

STEP 10. Measure the voltage at capacitor unit connector C-40 (terminal 1).




(1)Disconnect capacitor unit connector C-40, and measure at the wiring harness side.
(2)Turn the ignition switch to "ACC" position.

(3)Measure the voltage between terminal 1 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 12.

Go to Step 11.

STEP 11. Check the wiring harness between capacitor unit connector C-40 (terminal 1) and ignition switch ACC.





  • Check the power supply line (battery power supply) for open circuit and short circuit.


note Prior to the wiring harness inspection, check junction block connector B-229 and B-231, and repair if necessary.

Q. Is the wiring harness between capacitor unit connector C-40 (terminal 1) and ignition switch ACC in good condition?

Troubleshoot the ignition switch. Refer to .

Repair or replace the damage component(s).

STEP 12. Measure the voltage at capacitor unit connector C-40 (terminal 4).




(1)Disconnect capacitor unit connector C-40, and measure at the wiring harness side.
(2)Turn the ignition switch to "ACC" position.

(3)Measure the voltage between terminal 4 and earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 14.

Go to Step 13.

STEP 13. Check the wiring harness between capacitor unit connector C-40 (terminal 4) and ignition switch ACC.





  • Check the power supply line (battery power supply) for open circuit and short circuit.


note Prior to the wiring harness inspection, check junction block connector B-229 and B-231, and repair if necessary.

Q. Is the wiring harness between capacitor unit connector C-40 (terminal 4) and ignition switch ACC in good condition?

Troubleshoot the ignition switch. Refer to .

Repair or replace the damage component(s).

STEP 14. Connect the terminals of the capacitor unit connector C-40 by a jumper cable or a similar material, and check the radio with CD player for operation.




(1)Remove the capacitor unit.
(2)Connect the terminal 4 and terminal 3 of the capacitor unit connector C-40 using a jumper cable or a similar material.
(3) Turn the ignition switch to the "ACC" position, and check the radio with CD player for operation.

Q. Is the check result normal?

Replace the capacitor unit.

Go to Step 15.

STEP 15. Retest the system.


(1)Turn the ignition switch to "ACC" position.
(2)Turn ON the radio with CD player power switch.

Q. Is it possible to put the radio with CD player power in the "ON" position?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Replace the radio with CD player.