Problem Symptoms Table - Toyota Tundra 2005 Service - Repair - Maintenance

5.

PROBLEM SYMPTOMS TABLE

The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to
troubleshoot when, during a DTC check, a "Normal" code is displayed in the diagnostic trouble code check
but the problem is still occurring. Numbers in the table show the inspection order in which the circuits or parts
should be checked.
HINT:
In some cases, a problem is not detected by the diagnostic system even though a problem symptom is pres-
ent. It is possible that the problem is occurring outside the detection range of the diagnostic system, or that
the problem is occurring in a completely different system.
D Circuit Inspection, Inspection Order
Indicates the circuit which needs to be checked for a problem
symptom.
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)
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−27
See page
ST−2
ST−17
DI−147
DI−151
IN−29
DI−151
DI−144
DI−151
EM−3
DI−144
DI−151
DI−144
DI−151
AC−88