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Chime Module Diagnosis

NO CHIME WITH THE SEAT BELT UNFASTENED AND THE KEY IN THE IGNITION SWITCH

Step Action Value(s) Yes No
1 Check fuse Ef11 and Ef12.
Is fuse Ef11 and Ef12 blown?		 - Go to Step 2. Go to Step 3.
2
  1. Check for a short circuit and repair it, if necessary.
  2. Replace the blown fuse.

Is the repair complete?		 - System OK -
3 Check the voltage at fuse Ef11.
Is the voltage equal to the specified value?		 11-14V Go to Step 5. Go to Step 4.
4 Repair the power supply for fuse Ef11.
Is the repair complete?		 - System OK -
5
  1. Turn the ignition ON.
  2. Check the voltage at fuse Ef12.

Is the voltage equal to the specified value?		 11-14V Go to Step 7. Go to Step 6.
6 Repair the power supply for fuse Ef12.
Is the repair complete?		 - System OK -
7
  1. Disconnect the ISU connector.
  2. Turn the ignition ON.
  3. Check the voltage at terminal B27 of the ISU connector.

Is the voltage equal to the specified value?		 11-14V Go to Step 9. Go to Step 8.
8 Repair the open circuit between fuse Ef12 and ISU connector terminal B27.
Is the repair complete?		 - System OK -
9
  1. Disconnect the chime module electrical connector.
  2. Insert the key in the ignition switch.
  3. Check the voltage at terminal B23 of the ISU connector.

Is the voltage equal to the specified value?		 11-14V Go to Step 15. Go to Step 10.
10
  1. There are two wires from the key reminder switch which lead to an instrument harness connector. Disconnect that two-pin connector.
  2. Check the voltage at the circuit wire from terminal 2.

Is the voltage equal to the specified value?		 11-14V Go to Step 12. Go to Step 11.
11 Repair the open circuit between fuse Ef11 and the key reminder switch.
Is the repair complete?		 - System OK -
12
  1. Insert a key into the ignition switch.
  2. With the two-pin key reminder connector still disconnected, connect one ohmmeter lead to each wire leading to the key reminder switch.

Is the continuity equal to the specified value?		 0 Go to Step 14. Go to Step 13.
13 Replace the ignition switch.
Is the repair complete?		 - System OK -
14 Repair the open circuit between the connector for the key reminder switch and ISU connector terminal B23.
Is the repair complete?		 - System OK -
15 Use an ohmmeter to check the continuity between ground and terminal A8 of the ISU connector.
Is the continuity equal to the specified value?		 0 Go to Step 17. Go to Step 16.
16 Repair the open circuit between ground and terminal A8 of the ISU connector.
Is the repair complete?		 - System OK -
17
  1. Unfasten the driver's side seat belt.
  2. With the chime module electrical connector still disconnected, connect an ohmmeter between ground and terminal B27 of the ISU.

Is the continuity equal to the specified value?		 0 Go to Step 18. Go to Step 19.
18 Replace the ISU.
Is the repair complete?		 - System OK -
19
  1. Disconnect the seat belt switch under the driver's side seat.
  2. Connect one ohmmeter lead to each wire leading to the driver's side seat belt switch.

Is the continuity equal to the specified value?		 0 Go to Step 21. Go to Step 20.
20 Replace the seat belt switch.
Is the repair complete?		 - System OK -
21 Repair the open circuit between ground and terminal 1 of the chime module connector.
Is the repair complete?		 - System OK -
NO CHIME WITH DOOR OPEN AND KEY IN IGNITION SWITCH

Step Action Value(s) Yes No
1 Check fuse Ef11 and Ef12.
Is fuse Ef11 and Ef12 blown?		 - Go to Step 2. Go to Step 3.
2
  1. Check for a short circuit and repair it, if necessary.
  2. Replace the blown fuse.

Is the repair complete?		 - Go to Step 5. Go to Step 4.
3 Check the voltage at fuse Ef11.
Is the voltage equal to the specified value?		 11-14V Go to Step 5. Go to Step 4.
4 Repair the power supply for fuse Ef11.
Is the repair complete?		 - System OK -
5
  1. Turn the ignition ON.
  2. Check the voltage at fuse Ef12.

Is the voltage equal to the specified value?		 11-14V Go to Step 7. Go to Step 6.
6 Repair the power supply for fuse Ef12.
Is the repair complete?		 - System OK -
7
  1. Disconnect the chime module electrical connector.
  2. Turn the ignition ON.
  3. Check the voltage at terminal B27 of the ISU connector.

Is the voltage equal to the specified value?		 11-14V Go to Step 9. Go to Step 8.
8 Repair the open circuit between fuse Ef12 and ISU connector terminal B27.
Is the repair complete?		 - System OK -
9
  1. Disconnect the chime module electrical connector.
  2. Insert the key in the ignition switch.
  3. Check the voltage at terminal B23 of the ISU connector.

Is the voltage equal to the specified value?		 11-14 V Go to Step 14. Go to Step 10.
10 Repair the open circuit between fuse Ef11 and the key reminder switch.
Is the repair complete?		 - System OK -
11
  1. Insert a key into the ignition switch.
  2. With the two-pin key reminder connector still disconnected, connect one ohmmeter lead to each wire leading to the key reminder switch.

Is the continuity equal to the specified value?		 0 Go to Step 14. Go to Step 13.
12 Replace the ignition switch.
Is the repair complete?		 - System OK -
13 Repair the open circuit between the connector for the key reminder switch and ISU connector terminal B23.
Is the repair complete?		 - System OK -
14
  1. Open the driver's side door.
  2. With the chime module electrical connector still disconnected, connect an ohmmeter between ground and terminal A8 of the ISU.

Is the continuity equal to the specified value?		 0 Go to Step 18. Go to Step 19.
15 Replace the chime module.
Is the repair complete?		 - System OK -
16 Repair the open circuit between ground and terminal A8 of the ISU connector. (The driver door contact switch should be closed when the driver's side door is open.) Is the repair complete? - System OK -
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