Measure the voltage of the battery.

Is the voltage greater than or equal to the specified value?

12 V

Go to Step 5

Go to Step 2

1. Make sure the battery terminals and terminal bolts are free from corrosion.
2. Charge the battery. Refer to Battery Charging .
3. Remove the fuel pump relay from the Engine Wiring Harness Junction Block (Underhood Fuse Relay Center).
4. Attempt to crank the engine.

Does the engine crank normally?

--

Go to Step 3

Go to Step 5

1. Install the fuel pump relay.
2. Verify that the charging system is operating correctly. Refer to Charging System Check .

Is the charging system OK?

--

System OK

Go to Step 4

Repair the charging system.

Is the repair complete?

--

System OK

--

1. Remove the fuel pump relay from the Engine Wiring Harness Junction Block (Underhood Fuse Relay Center). Do not install the fuel pump relay until all cranking tests are completed.
2. Turn on the headlamps for 15 seconds to remove the surface charge from the battery.
3. Turn off the headlamps.
4. Measure the voltage between the battery terminals while cranking the engine.

Does the voltage drop below the specified value while the starter is cranking the engine?

9.5 V

Go to Step 6

Go to Step 9

Load test the battery. Refer to Battery Not Operating Properly .

Is the battery OK?

--

Go to Step 8

Go to Step 7

Replace the battery.

Is the repair complete?

--

System OK

--

Replace the starter motor. Refer to Starter Motor Replacement .

Is the repair complete?

--

System OK

--

Measure the voltage between the battery negative terminal and the engine block while cranking the engine.

Is the voltage greater than the specified value?

0.5 V

Go to Step 10

Go to Step 13

1. Inspect the battery and negative battery cable to determine if there is a high-resistance connection at either end.
2. Make sure that there is a clean connection between the starter mounting surface and the engine block.

Was a high-resistance connection found?

--

Go to Step 11

Go to Step 12

Repair the high-resistance connection.

Does the starter still crank slowly?

--

System OK

--

Replace the negative battery cable. Refer to Battery Cable Replacement .

Does the engine still crank slowly?

--

System OK

--

1. Inspect the starter to determine if there is a high-resistance connection at the starter B terminal.
2. If the battery positive terminal was not previously inspected, examine the positive terminal and terminal bolt for a corrosion which would indicate a high-resistance connection.

Was there a high-resistance connection found?

--

Go to Step 14

Go to Step 15

1. Repair the high-resistance connection.
2. Install the fuel pump relay.

Does the engine still crank slowly?

--

System OK

--

Replace the positive battery cable. Refer to Battery Cable Replacement .

Is the repair complete?

--

System OK

--