Pinpoint tests of steering column switches (Focus 1)

A1: CHECK FUSE 8 (30A)

1Disconnect Fuse 8 (30A).

2CHECK IT.

3Check fuse 8 (30A).

• Is the fuse good?

→ Yes

Go to A2

→ No

Install a new fuse 8 (30A). Check for proper system operation. If the fuse blows again, check circuit 30 (red) for a short to ground.

A2: CHECKING THE IGNITION SWITCH CONNECTOR

1Remove the steering column cover and check the ignition switch connector.

• Is the ignition switch connector in good condition (clean and securely fastened)?

→ Yes

Go to A3

→ No

If necessary, clean and tighten the ignition switch connector. Check that the system is working properly.

A3: CHECK CIRCUIT 30 (RED) FOR OPEN CONTINUITIES.

NOTE:Before starting the test, make sure the ground contact is clean.

1Connect Fuse 8 (30A).

2Disconnect the Ignition Switch - C456.

3Measure the voltage between ignition switch pin 4 C456, circuit 30 (red), and ground.

• Is the voltage more than 10V?

→ Yes

Go to A4

→ No

Repair electrical circuit 30 (red). Check that the system is operating correctly.

A4: CHECK IGNITION SWITCH

1Perform the ignition switch test. For additional information, refer to Section 700-09, Wiring Diagrams, for information on circuits and electrical components.

• Is the ignition switch working properly?

→ Yes

Check the validity of the customer's complaint.

→ No

Install a new ignition switch. For more information, refer to the "Ignition Switch" section of this section. Check that the system operates correctly.

B1: CHECK FUSE 50 (7.5A)

1Disconnect Fuse 50 (7.5A).

2CHECK IT.

3Check fuse 50 (7.5A).

• Is the fuse good?

→ Yes

Go to B2

→ No

Install a new fuse. Check the system for proper operation. If the fuse blows again, check for a short to ground at pin 14 of the central timer module or at circuits 75 (yellow/green) and 75 (yellow/blue).

B2: CHECK FOR VOLTAGE AT FUSE 50 (7.5 A)

NOTE:Before starting the test, make sure the ground contact is clean.

1Enter the ACCESSORY position.

2Measure the voltage between pin 1 of fuse 50 (7.5A), circuit 75 (yellow), and ground.

• Is the voltage more than 10V?

→ Yes

Go to B3

→ No

Repair electrical circuit 75 (yellow). Check for proper system operation.

B3: CHECK CENTRAL JUNCTION BOX (CJB) CIRCUIT FOR OPEN.

1Disconnect C13 CJB.

2Measure the resistance between pin 9 of C13 CJB and pin 2 of fuse 50 (7.5A).

• Is the resistance less than 5 ohms?

→ Yes

Go to B4

→ No

Install a new CJB. Check that the system is working properly.

B4: CHECK CIRCUIT 75 (YELLOW) FOR OPEN

1Disconnect the Ignition Switch - C456.

2Measure the resistance between pin 1 of fuse 50 (7.5 A), circuit 75 (yellow), and pin 6 of ignition switch C456, circuit 75 (yellow).

• Is the resistance less than 5 ohms?

→ Yes

Go to B5

→ No

Repair electrical circuit 75 (yellow). Check for proper system operation.

B5: CHECKING THE IGNITION SWITCH

1Perform the ignition switch test. For additional information, refer to Wiring Diagrams Section 700-09 for connection and electrical component information.

• Check the validity of the customer's complaint.

→ Yes

Install a new ignition switch.

→ No

For more information, see "Ignition Switch" in this section. Check that the system is working properly.

C1: CHECK ELECTRICAL CIRCUITS 15 (GREEN/BLUE) AND 15 (GREEN/YELLOW) FOR OPEN CIRCUITS

NOTE:Before starting the test, make sure the ground contact is clean.

1Disconnect the Ignition Relay - C1001.

2Enter the ON position.

3Measure the voltage between pin 1 of the C1001 ignition relay, electrical circuits 15 (green/blue) and 15 (green/yellow), and ground.

• Is the voltage more than 10V?

→ Yes

Go to C2

→ No

Go to C6

C2: CHECK CIRCUIT 30 (RED) FOR OPENINGS

NOTE:Before starting the test, make sure the ground contact is clean.

1Enter the OFF position.

2Measure the voltage between pin 3 of the C1001 ignition relay, circuit 30 (red), and ground.

• Is the voltage more than 10V?

→ Yes

Go to C3

→ No

Repair electrical circuit 30 (red). Check that the system is operating correctly.

C3: CHECK CIRCUIT 91 (BLACK/BLUE) FOR OPEN

1Measure the resistance between pin 2 of the C1001 ignition relay, electrical circuit 91 (black/blue), and ground.

• Is the resistance less than 5 ohms?

→ Yes

Go to C4

→ No

Repair electrical circuit 91 (black/blue). Check for proper system operation.

C4: CHECK FUSE F1 (40A).

1Disconnect Fuse 1 (40A).

2CHECK IT.

3Check fuse 1 (40A).

• Is the fuse good?

→ Yes

Go to C5

→ No

Install a new fuse. Check the system for proper operation. If the fuse blows again, check the 15 (green/red) circuit for opens.

C5: CHECK CIRCUIT 15 (GREEN/RED) FOR OPEN CONDITIONS

NOTE:Before starting the test, make sure the ground contact is clean.

1Connect Fuse 1 (40A).

2Connect the Ignition Relay.

3Disconnect Fuse 53 (10A).

4Enter the ON position.

5Measure the voltage between pin 1 of fuse 53 (10A), circuit 15 (green/red), and ground.

• Is the voltage more than 10V?

→ Yes

Go to C7

→ No

Go to C8

C6: CHECK IGNITION SWITCH

1Perform the ignition switch test. For additional information, refer to Wiring Diagrams Section 700-09 for connection and electrical component information.

• Is the ignition switch working properly?

→ Yes

Repair electrical circuit 15 (blue/light blue) or 15 (green/yellow).

→ No

Install a new ignition switch. For more information, refer to the "Ignition Switch" section of this section. Check that the system operates correctly.

C7: CHECKING THE IGNITION RELAY

1Check the ignition relay. For additional information, refer to section 700 - 09 "Wiring Diagrams" for information on connections and electrical components.

• Is the relay working properly?

→ Yes

Go to C8

→ No

Install a new relay. Check that the system is working properly.

C8: CHECK CENTRAL JUNCTION BOX FOR OPEN CIRCUIT.

1Disconnect C18 CJB.

2Measure the resistance between pin 1 of C18 CJB, circuit 15 (green/red), and pin 1 of fuse 53 (10A), circuit 15 (green/red).

• Is the resistance less than 5 ohms?

→ Yes

Repair electrical circuit 15 (green/red). Check that the system is operating correctly.

→ No

Install a new CJB. Check that the system is working properly.

D1: IS THERE AN AUDIBLE CLICKING SOUND IN THE STARTER INTERLOCK RELAY WHEN THE IGNITION SWITCH IS TURNS TO THE "START" POSITION?

1Enter the START position.

2Turn the ignition switch to the "START" position.

• Does the starter interlock relay click?

→ Yes

Go to D2

→ No

Go to D5

D2: CHECK FOR VOLTAGE AT STARTER CONNECTOR C2

NOTE:Before starting the test, make sure the ground contact is clean.

1Disconnect Starter - C2.

2Enter the START position.

3Measure the voltage between starter connector C2, circuit 50 (gray), and ground.

• Is the voltage more than 10V?

→ Yes

For additional information, see Section 303-06.

→ No

Go to D3

D3: CHECK CIRCUIT 50 (GRAY) FOR OPEN

1Enter the OFF position.

2Disconnect the Starter Interlock Relay.

3Measure the resistance between pin 5 of the starter inhibit relay C1017, circuit 50 (gray), and connector C2 of the starter, circuit 50 (gray).

• Is the resistance less than 5 ohms?

→ Yes

Go to D4

→ No

Repair electrical circuit 50 (gray). Check for proper system operation.

D4: CHECK CIRCUIT 50 (GRAY/ORANGE) FOR OPEN

NOTE:Before starting the test, make sure the ground contact is clean.

1Enter the START position.

2Measure the voltage between pin 3 of the C1017 starter inhibit relay, circuit 50 (gray/orange), and ground.

• Is the voltage more than 10V?

→ Yes

Check the starter lock relay. For additional information, refer to Wiring Diagrams Section 700-09 for connection and electrical component information.

→ No

Repair electrical circuit 50 (gray/orange). Check for proper system operation.

D5: CHECK CIRCUIT 15 (GREEN/YELLOW) FOR OPEN CONTINUITIES

NOTE:Before starting the test, make sure the ground contact is clean.

1Disconnect the Starter Interlock Relay.

2Enter the START position.

3Measure the voltage between pin 1 of the C1017 starter inhibit relay, circuit 15 (green/yellow), and ground.

• Is the voltage more than 10V?

→ Yes

Go to D6

→ No

Go to D7

D6: CHECK ELECTRICAL CIRCUIT 31S (BLACK/RED) FOR OPEN CIRCUIT

1Enter the OFF position.

2Disconnect CJB C13.

3Measure the voltage between pin 2 of the starter inhibit relay C1017, circuit 31S (black/red), and pin 3 of the center junction box C13, circuit 31S (black/red).

• Is the resistance less than 5 ohms?

→ Yes

Check the starter lockout relay. For additional information, refer to Section 700-09, Wiring Diagrams, for connection and electrical component information. If the relay is OK, proceed to Electronic Engine Controls. For additional information, refer to Section 303-14.

→ No

Install a new CJB. Check that the system is working properly.

D7: CHECKING THE IGNITION SWITCH

1Perform the ignition switch test. For additional information, refer to Wiring Diagrams Section 700-09 for connection and electrical component information.

• Is the ignition switch working properly?

→ Yes

Repair circuit 15 (green/yellow). Check that the system is operating correctly.

→ No

Install a new ignition switch. For more information, refer to the "Ignition Switch" section of this section. Check that the system operates correctly.