TGTE/Troubleshooting 2JZ-GTE — Disconnect igniter connector and check voltage between terminal Igt (1 ~ 6) of engine control module connector and body ground., page 37

EG-523
ENGINE — 2JZ-GTE ENGINE TROUBLESHOOTING

8  Disconnect igniter connector and check voltage between terminal
   IGT (1 ~ 6) of engine control module connector and body ground.

START

SST
ECM

B 57, 56, 55, 54
53, 52

IGT1, IGT2, IGT3, IGT4, IGT5, IGT6

BE6653
FI0946

P  Disconnect igniter connector.

C  Measure voltage between terminal IGT (1 ~ 6) of engine
   control module connector and body ground when engine
   is cranked.

OK  Voltage:  0.5 — 1.0 V
             (Neither 0 V nor 5 V)

Reference     INSPECTION USING OSCILLOSCOPE

IGT1, IGF Signal Waveforms
                    2 V/Div.
IGT1

0
IGF

0
20 msec./Division (Idling)

FI6952

• During idling, check waveforms between terminals
  IGF1, IGF and E1 of engine control module.

HINT:  The correct rectangular waveforms are as shown,
       IGT2, IGT3, IGT4, IGT5 and IGT6 signal wave-
       forms are same as IGT1 signal waveform.

NG                              OK  Replace igniter.

9  Check for open and short in harness and connector in IGT (1 ~ 6) signal
   circuit between engine control module and igniter (See page IN-30).

OK                              NG  Repair or replace harness or connector.

Check and replace engine control module.