Circuit/System Testing

NOTE:

If a carbon pile tester and ammeter is available, refer to With Carbon Pile Tester portion. Otherwise, refer to Without Carbon Pile Tester portion.

With Carbon Pile Tester

NOTE:

Requires carbon pile tester rated to a minimum 200 amps along with either a built-in ammeter or a clamp-on ammeter.

Vehicle On.
Verify DTC P1F59, P1F5A, P1F5B, P1F5D, or P1F5E is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTC is set

NOTE:

The vehicle must be capable of providing high voltage in order for the 14V power module to provide 12V current.

Verify that no K16A Battery Energy Control Module or B110 Battery Monitor Module DTCs are set that would cause a charging system concern.
- If any DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTC is set
Vehicle OFF.
Test for 12.4 V or greater at room temperature across the C1 Battery terminals 12 minutes after turning the vehicle OFF.
- If not in the specified range
  Refer to Battery Inspection/Test .
- Go to next step: If within the specified range

NOTE:

If using a clamp-on ammeter, place it around the C1 Battery negative cable.

Connect a carbon pile tester to the C1 Battery.
Vehicle ON, turn all accessories off. Observe the voltage reading on the tester. The voltage should read between 12.6 - 15.5 V.
Adjust the carbon pile tester so that the ammeter is reading 200 amps.
Verify the voltage reading remains between 12.6 - 15.5 V.
- If not in the specified range
1. Disconnect the X1 harness connector at the T18 battery charger, vehicle ON.
2. Test for 3.0 - 5.5V between the control circuit terminal X1-02 and ground.
  - If less than 3.0 V
  1. Vehicle OFF, wait 12 minutes and then disconnect the harness connectors at the K16A battery energy control module.
  2. Test for less than 2Ω in the control circuit end to end.
    - If greater than 2 ohms
      Repair the open/high resistance in the circuit.
    - Go to next step: If less than 2 ohms
  3. K16A Battery Energy Control Module 1 - Replace
  - Go to next step: If within 3.0 - 5.5 V
3. T18 Battery Charger - Replace
- Go to next step: If within the specified range
All OK.

Without Carbon Pile Tester

Vehicle On.
Verify DTC P1F59, P1F5A, P1F5B, P1F5D, or P1F5E is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTC is set

NOTE:

The vehicle must be capable of providing high voltage in order for the 14V power module to provide 12V current.

Verify that no K16A Battery Energy Control Module or B110 Battery Monitor Module DTCs are set that would cause a charging system concern.
- If any DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTC is set
Vehicle OFF, wait 12 minutes.
Test for 12.V or greater at room temperature across the C1 Battery terminals.
- If not in the specified range
  Refer to Battery Inspection/Test .
- Go to next step: If within the specified range
Vehicle On
Verify the scan tool Ignition and Start Signal parameter continually increases when controlling the 14V Power Module Setpoint from 10 - 80% with a scan tool. It may take up to 10 s for the battery voltage to stabilize between each setpoint change.
- If the battery voltage does not continually increase
1. Disconnect the X1 harness connector at the T18 Battery Charger, vehicle ON.
2. Test for 3.0 - 5.5 V between the control circuit terminal X1-02 and ground.
  - If less than 3.0 V
  1. Vehicle OFF, disconnect the harness connectors at the K16A battery energy control module.
  2. Test for less than 2 Ω in the control circuit end to end.
    - If greater than 2 ohms
      Repair the open/high resistance in the circuit.
    - Go to next step: If less than 2 ohms
  3. K16A Battery Energy Control Module 1 - Replace
  - Go to next step: If within 3.0 - 5.5 V
3. T18 Battery Charger - Replace
- Go to next step: If the battery voltage continually increases
All OK.