Signal Circuit Inspection

Check for short to battery in harness.
1. Ignition "OFF".
2. Disconnect SUB FLS sensor connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal "1" of SUB FLS harness connector and chassis ground.
  Specification: Approx. above 6.5V
  
  Fig 1: Measuring Voltage Between Terminal 1 Of SUB FLS Harness Connector And Chassis Ground
5. Is the measured voltage within specifications?
  YES
  - Go to " 2 Check for open in harness" as below.
  NO
  - Check for short to ground in harness.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for open in harness.
1. Ignition "OFF".
2. Disconnect SUB FLS sensor and PCM connector.
3. Measure resistance between terminal 1 of SUB FLS harness connector and terminal 20/C21-2 of PCM harness connector.
  Specification: Approx. below 1Ω
  
  Fig 2: Measuring Resistance Between Terminal 1 Of SUB FLS And Terminal 20/C21-2 Of PCM Harness Connector
4. Is the measured resistance within specifications?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Check for open in harness.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for open in intermediate connection.
1. Ignition "OFF".
2. Disconnect Sub. & Main connector of FLS.
3. Measure resistance between terminal 2 of SUB. FLS harness connector and MAIN FLS harness connector.
  Specification: Approx. below 1Ω
  
  Fig 3: Measuring Resistance Between Terminal 2 Of SUB. FLS And Main FLS Harness Connector
4. Is the measured resistance within specifications?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Check for open in harness.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.