Honda Civic. Manual — part 1051

SYMPTOM TROUBLESHOOTING CHART (GX)

start

REPLACEMENT ).

5. Check the throttle body (see THROTTLE

BODY TEST ).

6. Check for low engine compression (see

ENGINE COMPRESSION
INSPECTION ).

7. Check for a damaged or broken cam

chain.

Engine is hard
to start

1. Check for PGM-FI DTCs (see

GENERAL TROUBLESHOOTING
INFORMATION ).

2. Check the fuel pressure (see FUEL

PRESSURE TEST ).

3. Check for a plugged or damaged fuel line

(see FUEL LINE INSPECTION ).

4. Check for a plugged fuel filter (see FUEL

PRESSURE REGULATOR
REPLACEMENT ).

5. Check for a restricted three way catalytic

converter (TWO or exhaust system.

Engine cranks
slowly

1. Check for loose battery terminals or

connections.

2. Test the battery for a low charge (see

BATTERY TEST ).

3. Check the starter for binding (see

STARTER OVERHAUL ).

4. Check for excessive drag in the engine.

Symptom

Diagnostic procedure

Also check for

Engine does not start
(does not crank)

1. Check for loose battery

terminals or connections.

Poor ground at G101

2008 Honda Civic GX

2006-08 ENGINE Starting System (R18A1) - Civic (All Except Hybrid)

2. Test the battery for a low

charge, refer to the
BATTERY (ALL
EXCEPT HYBRID) .

3. Check the starter, refer to

the STARTER CIRCUIT
TROUBLESHOOTING .

4. Check the starter cut relay

(see POWER RELAY
TEST ).

5. Check the transmission

range switch, refer to the
TRANSMISSION
RANGE SWITCH
TEST .

6. Check the ignition switch

or wire, refer to the
IGNITION SWITCH
(ALL EXCEPT
HYBRID) .

Engine cranks, but does
not start

1. Check for PGM-FI DTCs

(see HOW TO USE THE
HDS (HONDA
DIAGNOSTIC
SYSTEM) ).

2. Check the throttle body,

refer to the THROTTLE
BODY TEST .

3. Check for low engine

compression, refer to the
ENGINE
COMPRESSION
INSPECTION .

2008 Honda Civic GX

2006-08 ENGINE Starting System (R18A1) - Civic (All Except Hybrid)

CIRCUIT DIAGRAM

4. Check for a damaged or

broken cam chain.

Engine is hard to start

1. Check for PGM-FI DTCs

(see HOW TO USE THE
HDS (HONDA
DIAGNOSTIC
SYSTEM) ).

2. Check for a restricted three

way catalytic converter
(TWC) or exhaust system.

Engine cranks slowly

1. Check for loose battery

terminals or connections.

2. Test the battery for a low

charge, refer to the
BATTERY (ALL
EXCEPT HYBRID) .

3. Check the starter for

binding, refer to the
STARTER
PERFORMANCE
TEST .

4. Check for excessive drag

in the engine.

2008 Honda Civic GX

2006-08 ENGINE Starting System (R18A1) - Civic (All Except Hybrid)

Fig. 2: Starting System - Circuit Diagram
Courtesy of AMERICAN HONDA MOTOR CO., INC.

STARTER CIRCUIT TROUBLESHOOTING

NOTE:

Air temperature must be between 59 and 100°F (15 an d
38°C) during this procedure.

2008 Honda Civic GX

2006-08 ENGINE Starting System (R18A1) - Civic (All Except Hybrid)