Inspection Procedure 34

Motor Antenna Won't Extend or Retract

Motor Antenna Circuit:

Connectors:

CIRCUIT OPERATION
The motor antenna-ECU extends or retract the antenna when the radio switch is turned on or off with the ignition switch in the "ACC" or "ON" position.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a defective motor antenna circuit system.

TROUBLESHOOTING HINTS
Damaged harness wire or connector.
- Malfunction of the motor antenna.
- Malfunction of the motor antenna-ECU

DIAGNOSIS

STEP 1. Check the surface of the antenna pole.

Q: Isn't the surface of antenna pole dirty?

YES: Clean.

NO: Go to Step 2.

STEP 2. Check the motor antenna bent

Q: Is the antenna bent?

YES: Repair the bent or replace the antenna pole.

NO: Go to Step 3.




STEP 3. Is the motor antenna assembly OK?
1. Disconnect motor antenna connector F-35.
2. Connect the circuit shown in the solid line.
3. Check that antenna extends when the circuit shown in the dotted line is connected.
4. Check that antenna retracts when the circuit shown in the doffed line is disconnected.

Q: Is motor antenna in good condition?

YES: Go to Step 4.

NO: Replace the motor antenna.




STEP 4. Check the motor antenna assembly ground by backprobing
1. Do not disconnect motor antenna assembly F-35 connector.
2. Measure the voltage between terminal number 5 and ground by backprobing.

Q: Is the resistance less than two ohm?

YES: Go to Step 7.

NO: Go to Step 5.




STEP 5. Check motor antenna connector F-35 for damage.

Q: Are motor antenna connector F-35 in good condition?

YES: Go to Step 6.

NO: Repair or replace it. Refer to Harness Connector Inspection. The motor antenna should work normally.




STEP 6. Check the harness wire between motor antenna connector F-35 and ground.

Q: Are the harness wires between motor antenna connector F-35 and ground in good condition?

YES: There is no action to be taken.

NO: Repair or replace it. Refer to Harness Connector Inspection. The motor antenna should work normally.




STEP 7. Check the motor antenna assembly power supply. (ignition switch "ACC") by backprobing
1. Do not disconnect motor antenna assembly F-35 connector.
2. Turn the ignition switch "ACC."
3. Measure the voltage between terminal number 1 and ground by backprobing.

Q: Are the voltages proximately 12 volts (battery positive voltage)?

YES: Go to Step 10.

NO: Go to Step 8.




STEP 8. Check motor antenna connector F-35 for damage.

Q: Are motor antenna connector F-35 in good condition?

YES: Go to Step 9.

NO: Repair or replace it. Refer to Harness Connector Inspection. The motor antenna should work normally.













STEP 9. Check the harness wire between motor antenna connector F-35 and ignition switch (ACC).

NOTE: After inspecting Intermediate connector C-89 and junction block connector C-101 and C-109, inspect the wire. If intermediate connector C-89 and junction block connector C-101 and C-109 are damaged, repair or replace it. Refer to Harness Connector Inspection.

Q: Are the harness wires between motor antenna connector F-35 and ignition switch (ACC) in good condition?

YES: There is no action to be taken.

NO: Repair or replace it. Refer to Harness Connector Inspection. The motor antenna should work normally.




STEP 10. Check the motor antenna assembly power supply circuit [Ignition switch "ON (G1)"] by backprobing
1. Do not disconnect motor antenna F-35 connector.
2. Turn the ignition switch "ON."
3. Measure the voltage between terminal number 6 and ground by backprobing.

Q: Are the voltages proximately 12 volts (battery positive voltage)?

YES: Go to Step 13.

NO: Go to Step 11.




STEP 11. Check motor antenna connector F-35 for damage

Q: Are motor antenna connector F-35 in good condition?

YES: Go to Step 12.

NO: Repair or replace it. Refer to Harness Connector Inspection. The motor antenna should work normally.










STEP 12. Check the harness wire between motor antenna connector F-35 and ignition switch (IG1).

NOTE: After junction block connector C-101 and C-113, inspect the wire. If junction block connector C-101 and C-113 are damaged, repair or replace it. Refer to Harness Connector Inspection.

Q: Are the harness wires between motor antenna connector F-35 and ignition switch (IG1) in good condition?

YES: There is no action to be taken.

NO: Repair or replace it. Refer to Harness Connector Inspection.




STEP 13. Check the motor antenna assembly power supply circuit. (battery) by backprobing
1. Do not disconnect motor antenna F-35 connector.
2. Measure the voltage between terminal number 8 and ground by backprobing.

Q: Are the voltages proximately 12 volts (battery positive voltage)?

YES: Replace the motor antenna assembly.

NO: Go to Step 14.




STEP 14. Check motor antenna connector F-35 for damage.

Q: Are motor antenna connector F-35 in good condition?

YES: Go to Step 15.

NO: Repair or replace it. Refer to Harness Connector Inspection.
















STEP 15. Check the harness wire between motor antenna connector F-35 and battery.

NOTE: After inspecting joint connector C-78, intermediate connector C-89 and junction block connector C-109 and C-113, inspect the wire. If joint connector C-78, intermediate connector C-89 and junction block connector C-109 and C-113 are damaged, repair or replace it. Refer to Harness Connector Inspection.

Q: Are the harness wires between motor antenna connector F-35 and battery in good condition?

YES: There is no action to be taken.

NO: Repair or replace it. Refer to Harness Connector Inspection.