Workshop Manual
6A–4
ENGINE MECHANICAL (6VE1 3.5L)
Engine Diagnosis
First of all the engine diagnose to check the fuel quantity,
the engine level and the engine coolant level.
Hard Starting
1. Starting Motor Does Not Turn Over
Troubleshooting Procedure
Turn on headlights and starter switch.
Condition
Possible cause Correction
Headlights go out or dim
considerably
Battery run down or under charged Recharge or replace battery
cons
id
era
bl
y
Terminals poorly connected Clean battery posts and terminals
and connect properly
Starting motor coil circuit shorted Overhaul or replace
Starting motor defective Overhaul or replace
2. Ignition Trouble — Starting Motor Turns Over But Engine Does Not Start
Spark Test
Disconnect an ignition coil from any spark plug. Connect
the spark plug tester (For example J–26792), start the
engine, and check if a spark is generated in the spark plug
tester. Before starting the engine, make sure that the
spark plug tester is properly grounded. To avoid electrical
shock, do not touch the part where insulation of the
ignition coil is broken while the engine is running.
Condition
Possible cause Correction
Spark jumps across gap
Spark plug defective Clean, adjust spark gap or replace
Ignition timing incorrect Refer to Ignition System
Fuel not reaching fuel injector(s) or
engine
Refer to item 3 (Trouble in fuel
system)
Valve timing incorrect Adjust
Engine lacks compression Refer to item 4 (Engine lacks
compression)
No sparking takes place
Ignition coil disconnected or broken Connect properly or replace
Electronic Ignition System with
module
Replace
Poor connections in engine harness Correct
Powertrain Control Module cable
disconnected or defective
Correct or replace
3. Trouble In Fuel System
Condition
Possible cause Correction
Starting motor turns over and spark
occurs but engine does not start
Fuel tank empty Fill
occurs
b
u
t
eng
i
ne
d
oes no
t
s
t
ar
t
.
Water in fuel system Clean
Fuel filter clogged Replace filter
Fuel pipe clogged Clean or replace
Fuel pump defective Replace
Fuel pump circuit open Correct or replace
Evaporative Emission Control
System circuit clogged
Correct or replace
Multiport Fuel Injection System faulty Refer to “Electronic Fuel Injection”
section