Circuit/System Testing

Left Side Object Sensor Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B218L Side Object Sensor Module - Left. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10Ω between ground circuit terminal 7 and ground.
   • If 10Ω or greater 
   1. Ignition OFF.
   2. Test for less than 2Ω in the ground circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, repair the open/high resistance in the ground connection.
   • If less than 10Ω 
3. Verify a test lamp illuminates between the B+ circuit terminal 8 and ground.
   • If the test lamp does not illuminate and the circuit fuse is good 
   1. Ignition Off.
   2. Test for less than 2Ω in the B+ circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, verify the fuse is not open and there is voltage at the fuse.
   • If the test lamp does not illuminate and the circuit fuse is open 
   1. Ignition OFF.
   2. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the B218L Side Object Sensor Module - Left.
   • If the test lamp illuminates 
4. Ignition OFF and all vehicle systems OFF.
5. Test for less than 2Ω between the B218L Side Object Sensor Module - Left serial data circuit terminal 1 and the X84 Data Link Connector serial data circuit terminal 1.
   • If 2Ω or greater 

     Repair the open/high resistance in the circuit.

   • If less than 2Ω 
6. Replace B218L Side Object Sensor Module - Left.

Side Object Indicator Malfunction

1. Ignition OFF and all vehicle systems OFF, remove the appropriate outside rearview mirror glass. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10Ω between the P34 Side Object Detection Indicator ground circuit terminal and ground.
   • If 10Ω or greater 
   1. Ignition OFF.
   2. Test for less than 2Ω in the ground circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, repair the open/high resistance in the ground connection.
   • If less than 10Ω 
3. Ignition ON, connect a test lamp between the P34 Side Object Detection Indicator control circuit terminal and ground.
4. Verify the test lamp turns ON and OFF when commanding the Object Detection Alert Indicators ON and OFF with a scan tool.
   • If the test lamp is always OFF 
   1. Ignition OFF, disconnect the harness connector at the B218R Side Object Sensor Module - Right.
   2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
   3. Test for less than 2Ω in the control circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, replace the B218R Side Object Sensor Module - Right.
   • If the test lamp is always ON 
   1. Ignition OFF, disconnect the harness connector at the B218R Side Object Sensor Module - Right, ignition ON.
   2. Test for less than 1V between the control circuit and ground.
      • If 1V or greater, repair the short to voltage on the circuit.
      • If less than 1V, replace the B218R Side Object Sensor Module - Right.
   • If the test lamp turns ON and OFF 
5. Test or replace the A9 Outside Rearview Mirror Glass.