Honda Civic. Manual — part 1045

CIRCUIT DIAGRAM

Engine is hard
to start

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 (TWC) 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.

2008 Honda Civic GX

2006-08 ENGINE Starting System (K20Z3) - Civic (All Except Si)

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

STARTER CIRCUIT TROUBLESHOOTING

NOTE:

Air temperature must be between 59-100°F (15-38°C)

2008 Honda Civic GX

2006-08 ENGINE Starting System (K20Z3) - Civic (All Except Si)

1. Hook up the following equipment:

Ammeter, 0-400 A

Voltmeter, 0-20 V (accurate within 0.1 V)

Fig. 3: Hooking Up Ammeter & Voltmeter
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Connect the HDS to the data link connector (DLC) (see step 2 on HOW TO

USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ).

3. Turn the ignition switch ON (II).
4. Make sure the HDS communicates with the vehicle and the ECM. If it doesn't,

troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).

5. Select PGM-FI, INSPECTION, then ALL INJECTORS OFF on the HDS.
6. Set the parking brake, then with the clutch pedal pressed, turn the ignition

during this procedure.

After this inspection, you must reset the engine control
module (ECM), otherwise the ECM will continue to stop
the fuel injectors from functioning.

The battery must be in good condition and fully
charged.

2008 Honda Civic GX

2006-08 ENGINE Starting System (K20Z3) - Civic (All Except Si)

switch to START (III).

Does the starter crank the engine normally?

YES -The starting system is OK. Go to step 12.

NO -Go to step 7.

7. Check the battery condition (see BATTERY TEST ). Check the electrical

connections at the battery, the negative battery cable to the body, the engine
ground cables, and the starter for looseness and corrosion. Then try cranking
the engine again.

Does the starter crank the engine?

YES -Repairing the loose connection corrected the problem. The starting
system is OK. Go to step 12.

NO -Check the following:

If the starter will not crank the engine at all, go to step 8.

If starter cranks the engine erratically or too slowly, go to step 10.

If starter does not disengage from the flywheel ring gear when you release
the key, replace the starter, or remove and disassemble it and check for the
following:

Solenoid plunger and switch malfunction

Dirty drive gear or damaged overrunning clutch

8. Make sure the transmission is in neutral, and set the parking brake. Disconnect

the starter subharness 1P connector (A) from the main wire harness 1P
connector (B). Connect a jumper wire from the battery positive terminal to the
starter subharness IP connector.

2008 Honda Civic GX

2006-08 ENGINE Starting System (K20Z3) - Civic (All Except Si)