Circuit/System Testing

NOTE:

Use the schematics and connector end views to identify the device's accessory wake up serial data 2 circuit terminals.

Vehicle OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. Disconnect the X1 harness connector at the G1 A/C Compressor. It may take up to 2 min for all vehicle systems to power down.
Vehicle in Service Mode.
Verify that a test lamp illuminates between the accessory wake up serial data 2 circuit terminal 2 X1 and ground.
- If the test lamp does not illuminate
1. Vehicle OFF and all vehicle systems OFF, remove the test lamp, disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
2. Test for less than 2 Ω between the G1 A/C Compressor wake up circuit terminal 2 X1 and the K114B Hybrid/EV Powertrain Control Module 2 wake up circuit terminal 43 X2.
  - If 2 Ω or greater, repair the open/high resistance in the accessory wake up serial data 2 circuit.
  - If less than 2 Ω
3. Vehicle in Service Mode.
4. Verify that a test lamp illuminates between the K114B Hybrid/EV Powertrain Control Module 2 accessory wake up serial data circuit terminal 67 X2 and ground.
  - If the test lamp does not illuminate, test the accessory wake up serial data circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  - If the test lamp illuminates
5. Replace the K114B Hybrid/EV Powertrain Control Module 2.
- If the test lamp illuminates
Test or replace the G1 A/C Compressor.