Problem Symptoms Table - Toyota T100 1996 Service Manual

5.

PROBLEM SYMPTOMS TABLE

The suspect circuits or parts for each problem symptom are shown in the table below. Use this table to trou-
bleshoot the problem when a "Normal" code is displayed in the diagnostic trouble code check but the prob-
lem is still occurring. Numbers in the table indicate the inspection order in which the circuits or parts should
be checked.
HINT:
When the problem is not detected by the diagnostic system even though the problem symptom is present,
it is considered that the problem is occurring outside the detection range of the diagnostic system, or that
the problem is occurring in a system other than the diagnostic system.
D Circuit Inspection, Inspection Order
Indicates the circuit which needs to be checked for each problem
symptom. Check in the order indicated by the numbers.
D Problem Symptom
PROBLEM SYMPTOMS TABLE
Symptom
Engine does not crank (Does not start)
No initial combustion (Does not start)
No complete combustion (Does not start)
Engine cranks normally (Difficult to start)
Cold engine (Difficult to start)
Hot engine
High engine idle speed (Poor idling)
1996 TOYOTA T100 (RM449U)
INTRODUCTION
D Circuit or Part Name
1. Starter and starter relay
1. ECM power source circuit
2. Fuel pump control circuit
3. Engine control module (ECM)
1. Fuel pump control circuit
1. Starter signal circuit
2. Fuel pump control circuit
3. Compression
1. Starter signal circuit
2. Fuel pump control circuit
1. Starter signal circuit
2. Fuel pump control circuit
1. A/C signal circuit (Compressor circuit)
2. ECM power source circuit
1. A/C signal circuit
idling)
2. Fuel pump control circuit
1. Compression
2. Fuel pump control circuit
− HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
D Page
Indicates the page where the flow chart for each circuit
is located.
Indicates the circuit or part which needs to be checked.
Suspect Area
IN−23
See page
ST − 2, ST − 17
DI − 101
DI − 104
IN − 28
DI − 104
DI − 173
DI − 104
EM − 3
DI − 173
DI − 104
DI − 173
DI − 104
AC − 85
DI − 101