P1446
DTC P1446 (74): Battery Module Individual Voltage Input Deviation1. Reset the MCM.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II), and wait for 30 seconds.
Is DTC P1446 indicated?
YES - Go to step 5.
NO - Go to step 4.
4. Test-drive the vehicle under stop-and-go conditions for about 10 minutes.
Is DTC P1446 indicated?
YES - Go to step 5.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the battery module and at the MCM.
5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF, and wait 5 minutes.
7. Remove the IPU lid, and make sure there is 30 V or less at the junction terminals.
8. Measure voltage between the following MCM connector terminals:
^ F14 and F6
^ F6 and F13
^ F13 and F5
^ F5 and F4
^ F1 and F7
^ F7 and F2
^ F2 and F8
^ F8 and F3
^ F3 and F9
^ F9 and F10
Is there more than 1.2 V difference between the highest voltage and the lowest voltage?
YES - Replace the battery module.
NO - Update the MCM if it does not have the latest software, or substitute a known-good MCM, then recheck. If the symptom/indication goes away with a known-good MCM, replace the original MCM.