DI1HM--01
DI--18
--
DIAGNOSTICS
ENGINE (1RZ--E)
PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed in the diagnostic trouble code check and the problem still can
not be confirmed in the basic inspection, proceed to this matrix chart and troubleshoot according to the num-
bered order given below.
Symptom
Suspect Area
See page
Engine does not crank (Does not start)
1. Starter
2. Starter relay
No initial combustion (Does not start)
1. Engine ECU power source circuit
2. Ignition signal circuit
3. Fuel system circuit
4. Spark plug
5. Injector circuit
*
No complete combustion (Does not start)
1. Fuel system circuit
2. Ignition signal circuit
3. IIA
4. Spark plug
5. Injector circuit
*
*
Engine cranks normally (Difficult to start)
1. Starter signal circuit
3. Fuel system circuit
4. IIA
5. Spark plug
6. Compression
7. Injector circuit
*
*
*
Cold engine (Difficult to start)
1. Starter signal circuit
3. Fuel system circuit
4. Injector circuit
5. IIA
6. Spark plug
*
*
Hot engine (Difficult to start)
1. Starter signal circuit
3. Fuel system circuit
4. Injector circuit
5. IIA
6. Spark plug
*
*
High engine idle speed (Poor idling)
1. Engine ECU power source circuit
2. Back up power source circuit
Low engine idle speed (Poor idling)
3. Fuel system circuit
4. Injector circuit
5. Vacuum sensor circuit
6. Back up power source circuit
DI -- 60
DI -- 57
DI -- 35
DI -- 54
Rough idling (Poor idling)
2. Vacuum sensor circuit
3. Injector circuit
4. Variable resistor circuit
5. Ignition signal circuit
6. Compression
7. Fuel system circuit
8. IIA
9. Spark plug
10. Back up power source circuit
DI -- 35
DI -- 57
DI -- 67
DI -- 24
*
*
*
Hunting (Poor idling)
2. Vacuum sensor circuit
3. Engine ECU power source circuit
4. Fuel system circuit
*: See Pub RM467E
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Pages From Supplement
3RZ-F,3RZ-FE