Inspection Procedure 26

Motor Antenna won't Extend or Retract.

Motor Antenna Circuit Part 1:

Motor Antenna Circuit Part 2:

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 wiring harness 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. 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 4.

NO: Go to Step 5.

STEP 4. Check the motor antenna assembly.




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 dotted line is disconnected.

Q: Is motor antenna in good condition?

YES: Go to Step 7.

NO: Replace the motor antenna.




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 the connector. Refer to Harness Connector Inspection. The motor antenna should work normally.




STEP 6. Check the wiring harness between motor antenna connector F-35 (terminal 5) and ground.

Q: Are the wiring harness between motor antenna connector F-35 (terminal 5) and ground in good condition?

YES: There is no action to be taken.

NO: Repair the wiring harness. 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 the connector. Refer to Harness Connector Inspection. The motor antenna should work normally.







STEP 9. Check the wiring harness between motor antenna connector F-35 (terminal 1) and ignition switch (ACC).

NOTE: After inspecting intermediate connector C-89 and C-90, inspect the wire. If intermediate connector C-89 and C-90 are damaged, repair or replace them. Refer to Harness Connector Inspection.

Q: Are the wiring harness between motor antenna connector F-35 (terminal 1) and ignition switch (ACC) in good condition?

YES: There is no action to be taken.

NO: Repair the wiring harness. Refer to Harness Connector Inspection. The motor antenna should work normally.

STEP 10. Check the motor antenna assembly power supply circuit [ignition switch "ON (IG1)"] 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 the connector. Refer to Harness Connector Inspection. The motor antenna should work normally.










STEP 12. Check the wiring harness between motor antenna connector F-35 (terminal 6) and ignition switch (IG1).

NOTE: After inspecting junction block connector C-111, C-112 and intermediate connector C-89, C-90 and joint connector C-78, inspect the wire. If junction block connector C-111, C-112 and intermediate connector C-89, C-90 and joint connector C-78 are damaged, repair or replace it. Refer to Harness Connector Inspection.

Q: Are the wiring harness between motor antenna connector F-35 (terminal 6) and ignition switch (IG1) in good condition?

YES: There is no action to be taken.

NO: Repair the wiring harness. 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 the connector. Refer to Harness Connector Inspection.







STEP 15. Check the wiring harness between motor antenna connector F-35 (terminal 8) and battery.

NOTE: After inspecting joint connector C-78, intermediate connector C-89 and C-90, inspect the wire. If joint connector C-78, intermediate connector C-89 and C-90 are damaged, repair or replace them. Refer to Harness Connector Inspection.

Q: Are the wiring harness between motor antenna connector F-35 (terminal 8) and battery in good condition?

YES: There is no action to be taken.

NO: Repair the wiring harness. Refer to Harness Connector Inspection.