Removal Procedure
- Disconnect the hybrid battery. Refer to
Hybrid Battery Service Disconnect/Connect.
- Unclip the battery positive cable jumper block (1) from the engine control module (ECM) bracket (4).
- Disconnect the ECM electrical connectors (2) and the transmission control module (TCM) electrical connector (3).
- Remove the ECM bracket bolts (1), nuts (2) and ECM bracket (3).
- Remove the generator control module cover bolts (1) and cover (2).
Warning: To help avoid personal injury, additional precautions must be taken prior to working on the generator control module or the generator starter. After removing the 36V battery cables from the generator
battery, remove both engine wiring harness connectors from the generator control module. Wait at least 5 minutes and then remove the generator control module cover. Verify voltage levels at all 36V, 12V, and 3-phase connections, are less than 3 volts
using a DMM before proceeding.
- Check the generator control module for voltage potential, in order to ensure that the module has been disabled.
| 6.1. | Measure from the 36-volt positive terminal (3) to a known good chassis ground. The voltage should be less than 3 volts. |
| 6.2. | Measure from the 12-volt positive terminal (4) to a known good chassis ground. The voltage should be less than 3 volts. |
| 6.3. | Measure from the ground terminal (2) to a known good chassis ground, checking for continuity. |
Warning: To help avoid personal injury, always treat the 3-phase cable and connectors as if voltage is present and as if the surface of all parts of the cable is hot.
- Verify that the generator control module 3-phase cables are disabled.
| 7.1. | Measure from each phase 1, 2 and 3 connection (1) to a known good chassis ground. The voltage should be less than 3 volts. |
| 7.2. | After verifying that there is no voltage present, the generator control module 3-phase cables can now be removed from the generator control module. |
- Remove the battery positive cable fuse nuts (1) and bolt (2).
- Reposition the battery positive cable (3) and remove the 175 mega amp fuse (4).
Installation Procedure
- Install the 175 mega amp fuse (3) and the battery positive cable (3).
Caution: Refer to Fastener Caution in the Preface section.
- Install the battery positive cable bolt (2) and nut (1) and tighten to
10 N·m (89 lb in).
- Install the generator control module cover bolts (1) and cover (2) and tighten the bolt to
10 N·m (89 lb in).
- Install the ECM bracket (3), bolts (1) and nuts (2) and tighten the nuts to
10 N·m (89 lb in).
- Connect the ECM electrical connectors (2) and the TCM electrical connectors (3).
- Clip in the battery positive cable jumper block (1) to the ECM bracket (4).
- Connect the hybrid battery. Refer to
Hybrid Battery Service Disconnect/Connect.
