NHW11 P3030 with new harness

Roy from Canada here to try and help

If you have or can buy a digital voltmeter it will help you solve your problem -

1) The voltmeter should be set on dc volts in the 20 volt range ( your meter may read a voltage higher then this but get as close to 20 volts as possible on your voltmeter setting),

2) You have 38 modules (count them) in your battery. Starting from the ECU side of the battery every 2 modules are monitored as a block by the computer through the 19 wire harness that you replaced
Using your volt meter you can measure the voltages of the modules in pairs starting at the ECU, the first 2 are seen as block one by the computer, the 3rd and 4 th are seen as 2 and so forth - a total of 19 pairs are reported to the cars computer. Because the modules are reported in pairs the computer only looks at the sum of two modules in voltage. For instance if module one was 7 volts and module 2 was 8 volts the computer would see 15 volts as block number 1 . Measuring the voltage from the positive terminal on module number on to the negative terminal on module number 2, this should read block one 15 volts and the computer should show number one block pair as 15 volts, if it does not then their is likely a broken wire connection - the most common area for the break is at the connector right at the terminal of the module ( the necks of the connectors are very small and fragile and break at the point where they push into the plastic, the breaks are so fine you only see them when you remove the connector and part of the connector is seen as broken). You indicate you have replaced the 19 wire reporting harness so you can use wiring from your old harness to repair the new one. ( when you find broken wires).

3) Handle the reporting harness with care as it seems to me you may have damaged the new harness upon installation or it was damaged when you bought it.

4) Looking at your original data it seems you had a break in blocks 17 and or 18 or both, this would be modules 33 and 34 (block 17) and 35 and 36 (block 18) counting from the ECU. It is at these locations you should have looked for breaks in the wires

5) It appears you may have not put the wires back in the correct order when installing the new harness and that is the reason for your new harness not working and reporting the voltages incorrectly.

6) You could remove the battery cover in place and sort out the issue without removing the battery from the car.

7) you may still have some weak blocks but the computer will give you a different code if that is the case. Sort out the bad or miswired connection first.

Best of luck
Roy

 

Those voltages are way two low on 15 and 18 -

Do you have the battery top off so you can measure the individual voltage on each module - not the block. If so measure across each module from positive to negative to get the module voltage - if your modules have voltages below 6 volts the modules will have to be charged.
You may have to get RC charger that will allow you to charge and discharge the modules and check their capacities. Go to the gen 2 forum site and click on Gen 1 - it is a forum for your car and has many instructions on charging and discharging the modules. Read as much as you can to understand how to do it - buying used modules may end up being a solution but you may want to try the RC charger route. RC chargers are sold a hobby shops to charge batteries for rc cars.