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Toyota Supra JZA80

Problem symptoms table 2JZ-GE engine

When the malfunction code is not confirmed in the DTC check and the problem still can not be confirmed in the basic inspection, then proceed to this step and perform troubleshooting according to the numbered order given in the table below.

Symptom Suspect Area See page
Does not start (Engine does not crank) 1. Starter and Starter relay ST-14
ST-16
Does not start (No initial combustion)
  1. ECM power source circuit
  2. Fuel pump control circuit
  3. Engine control module (ECM)
DI-132
DI-110
IN-28
Does not start (No complete combustion) 1. Fuel pump control circuit DI-110
Difficult to start (Engine cranks normally)
  1. Starter signal circuit
  2. Fuel pump control circuit
  3. Compression
DI-121
DI-110
EM-3
Difficult to start (Cold engine) 1. Starter signal circuit 2.Fuel pump control circuit DI-121
DI-110
Difficult to start (Hot engine)
  1. Starter signal circuit
  2. Fuel pressure control circuit
  3. Fuel pump control circuit
DI-121
DI-137
DI-110
Poor idling (High engine idle speed)
  1. A/C signal circuit (compressor circuit)
  2. ECM power source circuit
DI-739
DI-132
Poor idling (Low engine idle speed)
  1. A/C signal circuit (compressor circuit)
  2. Fuel pump control circuit
DI-739
DI-110
Poor idling (Rough idling)
  1. Compression
  2. Fuel pump control circuit
EM-3
DI-110
Poor idling (Hunting)
  1. ECM power source circuit
  2. Fuel pump control circuit
DI-132
DI-110
Poor Driveability (Hesitation/Poor acceleration)
  1. Fuel pump control circuit
  2. A/T faulty
DI-110
DI-333
Poor Driveability (Surging) 1. Fuel pump control circuit DI-110
Engine stall (Soon after starting) 1. Fuel pump control circuit DI-110
Engine stall (During A/C operation)
  1. A/C signal circuit (compressor circuit)
  2. Engine control module (ECM)
DI-739
IN-18
This guide is based on the book edition Toyota (RM502U, 1997)

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