Drive Motor Generator Power Inverter Module Removal and Installation
Drive Motor Generator Power Inverter Module Removal and Installation
Special Tools
* GE-48494 - Power Electronics Pressure Test Adapter Kit
* J 24460-01 - Cooling System Pressure Tester
Removal Procedure
1. Remove the drive motor generator control module from the vehicle. Refer to Drive Motor Generator Control Module Assembly Replacement Drive Motor Generator Control Module Assembly Replacement.
2. Remove the temporary coolant pipe caps (1).
Caution: The module must be drained of all residual coolant prior to disassembly. Failure to properly drain all residual coolant may cause electronic circuit damage to occur during disassembly.
Note: Place a container under the coolant outlet pipe to capture the escaping coolant.
3. Drain the drive motor generator control module assembly of residual coolant by applying 30 psi regulated compressed air to the coolant inlet pipe until no coolant remains.
4. Remove the drive motor generator power inverter control module cover fasteners (1).
5. Remove the power inverter module cover (2). Discard the cover seal (3).
Caution: Always remove and install the High Voltage terminal fasteners with a magnet tipped socket. Never touch the exposed electronic circuit board surface or components. Dropped fasteners or physical contact may result in electronic circuit board damage.
6. Remove the high voltage dc accessory DC power control module terminal fasteners (1) utilizing a magnetic socket.
7. Temporarily install the power inverter module cover (2) with 4 finger-tightened fasteners (1).
8. Rotate the drive motor generator control module assembly onto the power inverter module cover.
9. Remove the accessory DC power control module to power inverter module mounting fasteners (1).
10. Remove the accessory DC power control module (2) and discard the coolant seal (3).
Note: A service replacement power inverter module contains pre-installed coolant pipes. The following steps are necessary for coolant pipe seal replacement only.
11. Remove the drive motor generator power inverter coolant pipes:
1. Remove the drive motor generator power inverter coolant pipe bolts (4, 7).
2. Remove the drive motor generator power inverter coolant pipes (5, 8).
3. Remove and discard coolant seals (6, 9).
Installation Procedure
1. Install new accessory DC power control module coolant seal (3).
2. Position the accessory DC power control module (2) onto the power inverter module ensuring the seals remain in place.
Caution: Refer to Fastener Caution Fastener Caution.
3. Install the accessory DC power control module mounting fasteners (1). Tighten the mounting fasteners to 10 Nm (89 lb in).
Note: Only use pre-mixed DEX-COOL(R) on the coolant pipe O-ring to aid in tube installation.
4. Install the drive motor generator power inverter coolant pipes unless a service replacement power inverter module is being installed:
1. Lubricate the new seals (6, 9) with pre-mixed DEX-COOL(R).
2. Install new seals (6, 9) onto the drive motor generator power inverter coolant pipes (5, 8).
3. Install the coolant pipes (5, 8) to the power inverter module assembly with bolts (4, 7). Tighten the fasteners to 5 Nm (44 lb in).
5. Rotate the drive motor generator control module assembly onto the accessory DC power control module.
6. Clamp GE-48494 - adapter kit components (2, 3) to a coolant pipe.
7. Plug the remaining coolant pipe with the GE-48494 - adapter kit plug and clamp (1).
8. Apply 20 psi (138 kPa) pressure with J 24460-01 - pressure tester (4).
9. Monitor the pressure tester gauge for 5 minutes and ensure that pressure remains at the specified value.
* If the specified pressure cannot be maintained, disassemble the drive motor generator control module assembly and replace the coolant seal.
* If pressure remains at the specified value, proceed to the next step.
10. Remove all GE-48494 - adapter kit components.
11. Remove the power inverter module cover retaining bolts (1).
12. Remove the power inverter module cover (2).
Caution: Always remove and install the High Voltage terminal fasteners with a magnet tipped socket. Never touch the exposed electronic circuit board surface or components. Dropped fasteners or physical contact may result in electronic circuit board damage.
13. Install the high voltage dc accessory DC power control module terminal fasteners (1) utilizing a magnetic socket. Tighten the terminal fasteners to 9 Nm (80 lb in).
14. Install a new power inverter module cover seal (3).
Note: DO NOT use excessively abrasive cleaning tools on the sealing surface. Hand sanding with wet 400 grit sandpaper or use of a hand scraper is recommended.
15. Clean the sealing surface of the power inverter module cover as necessary.
16. Position the power inverter module cover (2) onto the power inverter module ensuring the seal remains in place.
17. Install the power inverter module cover fasteners (1). Tighten the fasteners to 5 Nm (44 lb in).
18. Install the drive motor generator control module. Refer to Drive Motor Generator Control Module Assembly Replacement Drive Motor Generator Control Module Assembly Replacement.