Toyota Camry AHV40 AC Operation

6T153FK400X227192 Australian Built Toyota Camry Hybrid 2010

Diagnosed fault in Ac Compressor -Had various codes - little R134a in system- Removed Compressor-Disabled HV system by disconnecting Battery safety cut out dismantled end cap found that in had a internal failure- Had various codes one being B1498 and other codes

Sourced a replacement New Compressor .New Replaced Condenser , New TX valve and flushed system 

Vacuum and Gas system to required quantity 530gms 

System is showing 5 bar on Low and high side gauges 

AC compressor is not pumping - Checked out High Voltage side - disconnected Orange HV plug and with correct PPE measured 260V DC @ Compressor 

Check HV fuse resistance 

Check HV cable from invertor AC fuse to Ac Compressor resistance check OK 

Researched both codes P3108 LOST COMMUNICATION WITH A/C SYSTEM CONTROL MODULE

Note our aftermarket scan tool doesn't give the sub codes 

B1498 COMMUNICATIOIN MALFUNCTION (A/C INVERTER LOCAL)

Check 6 pin Low voltage side at AC Compressor - Checked Power and ground to Pins 5+ 6 ok 

Check Continuity of 4 wires back to Hybrid Motor ECU and for any shorting to ground - ok 

Check for a present of a square wave signal at 

C64-18 (CLK) - Body ground

C64-20 (ITE) - Body ground Power switch on (IG) Pulse generation

Nil Waveform - next step according to Toyota manual is to replace AC Compressor 

Sourced another secondhand Compressor - Compressor supplied had different part number sourced from Aftermarket 

Thinking that Compressor may not be compatible 

Old Compressor Denso # ES27C …

New Denso ES27C- …

After S/hand compressor still not cooling or compressor action 

Second Hand compressor introduces a new Code B1473- A/C Inverter Start-up Signal System Malfunction- had previously followed flow chart for HV wiring 

Not sure what I am missing 

Is it correct to have 260vDC voltage a AC compressor HV side 

Reading thru my notes and flow chart for B1498 just now I may have missed 

C64-33 (STB) - Body ground Power switch on (IG) 10 to 14 V this is done with plug disconnected at Hybrid Engine module