Circuit/System Testing

Pedestrian Alert Sound System Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K132 Pedestrian Alert Sound Control Module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 3 and ground.
   • If 10 Ω or greater 
   1. Ignition OFF.
   2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
   • If less than 10 Ω 
3. Verify a test lamp illuminates between the B+ circuit terminal 10 and ground.
   • If the test lamp does not illuminate and the circuit fuse is good 
   1. Ignition OFF.
   2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, 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 K132 Pedestrian Alert Sound Control Module.
   • If the test lamp illuminates 
4. Ignition ON.
5. Verify a test lamp illuminates between the ignition circuit terminal 4 and ground.
   • If the test lamp does not illuminate and the circuit fuse is good 
   1. Ignition OFF.
   2. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is OK 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 ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K132 Pedestrian Alert Sound Control Module.
   • If the test lamp illuminates 
6. Replace the K132 Pedestrian Alert Sound Control Module.

Output Speaker Malfunction

1. Ignition OFF, disconnect the harness connector at the P48 Pedestrian Alert Sound Speaker. Ignition ON,.
2. Command Pedestrian Alert Sound When Driving Forward parameter On with a scan tool.
3. Test for 5-7 V between each audio signal circuit terminal 1 and terminal 2 and ground.
   • If less than 5 V 
   1. Ignition OFF, disconnect the X1 harness connector at the K132 Pedestrian Alert Sound Control Module.
   2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
   3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K132 Pedestrian Alert Sound Control Module.
   • If greater than 7 V 
   1. Ignition OFF, disconnect the X1 harness connector at the K132 Pedestrian Alert Sound Control Module. Ignition ON.
   2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K132 Pedestrian Alert Sound Control Module.
   • If between 5-7 V 
4. Test for 49-51 Hz AC between each signal circuit terminal 1 and terminal 2 and ground.
   • If not between 49-51 Hz AC 

     Replace the K132 Pedestrian Alert Sound Control Module.

   • If between 49-51 Hz AC 
5. Test or replace the P48 Pedestrian Alert Sound Speaker.