MembersPage/AlexJ

I have set up this project page for the issue I have with no injectors or coils firing, after having the ecu repaired (Chip replaced) for pegged exhaust temp @ 1200 deg.

[uploaded files]

also a trigger log done after I received the ecu back when I was investigating the no start issue.

the care is a 3B engine (harness) using an ANN ecu. pins have been swapped in the motronic55 female connector. car was running as you can see from the log I uploaded.

Thanx Alex for the proper report with files. We could reproduce, and indeed: with c270 trigger (confirmed by triggerlog), but RPM=0. Shame, but I couldn't spot the config problem (maybe it's a previously unknown deficiency in 1.1.96 ? We'll let you know if we find). But upgraded to 1.2.23 and works like a charm (fired injectors, and 1 ign).

AAN ECU serial number is 1450 :

firmware 1.1.95 although 1.1.96 was installed when I received it back. I think I changed it to 1.1.96 just before I removed it to send away.


Speculation


EGT K-thermo tip broken

Although this, in theory shouldn't damage the ADC597 chip (which was damaged earlier), who knows... In any case, a new K-thermocouple will be needed.


Before / After

Comparing config before/after (the ecu repair):

diff -U2 alex18_before_repair.vemscfg v3.3_u001450-A-2014.03.28-17.25.55_after_Repair.vemscfg

Suggests: Apparently some innocent calibration differences

(eg. nernst dc target was wrong before) but only max_prim_per_sec_count could effect triggering.

@@ -43,5 +43,5 @@
 battfac=22
 kpafac=D0
-kpaoffs=94
+kpaoffs=90
 injocfuel=08
 injrampup_battfac=FF
...                                                              -wbo2_nernstdc_target=80                                         -wbo2_pump_pw_zero=82                                            +wbo2_nernstdc_target=84                                         +wbo2_pump_pw_zero=67                                             wbo2_calibration=ED
 wbo2_heater_pid_kp=45
@@ -238,5 +238,5 @@
 act_rpm_rpm=FF
 act_rpm_channel=FF
-egt1_cal=4B
+egt1_cal=49
 als_tks_channel=FF
 boost_conf=69
@@ -299,7 +299,7 @@
 bla_8[0]=65
 bla_8[1]=65
-bla_8[2]=65
-bla_8[3]=65
-bla_8[4]=65
+vvti_measure_tooth=00
+max_prim_per_sec_count=FF
+sd_logging_mode=3F
 boost_pwm_max=FF
 boost_pwm_min=71
@@ -448,5 +448,5 @@
 prohibit_config=00
 prohibit_h=04
-prohibit_l=DF
+prohibit_l=E0
 config_switch=07
 vtstorage[0]=7F

Thanks for the analysis i will give the config with updated firmware a try tomorrow.

just for info the car is a 3b engine running 5 individual V8 coils. you might of guessed from the config.

Alex