Isuzu KB P190. Manual — part 1399

Cruise Control – HFV6

Page 8C–18

Step Action

Yes

No

24 1

Disconnect the PIM connector B – 97.

2

Using a multimeter set to measure voltage, back probe between
the harness connector B – 97 pin 15 and a known ground.

3

With the aid of an assistant, monitor the voltage on the
multimeter and press and release the cruise control switch to
SET–COAST button.

•

With the switch in the rest position, the multimeter should
display 0 V.

•

With the switch pressed, the multimeter should display
battery voltage.

Does the multimeter display as described?

Go to Step 30

Check for short to

ground or open

circuit on circuit.

Repair as required

(refer to Note 1).

Go to Step 32

25 1

Disconnect the PIM connector B – 97.

2

Using a multimeter set to measure voltage, back probe between
the harness connector B – 97 pin 17 and a known ground.

3

With the aid of an assistant, monitor the voltage on the
multimeter and rotate and release the cruise control switch to
CANCEL position.

•

With the switch in the rest position, the multimeter should
display 0 V.

•

With the switch rotated clockwise, the multimeter should
display battery voltage.

Does the multimeter display as described?

Go to Step 30

Check for short to

ground or open

circuit on circuit.

Repair as required

(refer to Note 1).

Go to Step 32

26 1

Disconnect the ECM connector C – 56.

2

Using a multimeter set to measure voltage, back probe between
the harness connector C – 56 pin 10 and ground.

3

With the aid of an assistant, monitor the voltage on the
multimeter and press and release the brake pedal.

•

With the brake pedal in the rest position, the multimeter
should display 0 V

•

With the brake pedal pressed, the multimeter should
display battery voltage

Does the multimeter display as described?

Go to Step 30

Check for a blown

fuse C-18.

Check for short to

ground or open

circuit

Repair as required

(refer to Note 1).

Go to Step 32

27 1

Disconnect the ECM connector C – 56.

2

Using a multimeter set to measure voltage, back probe between
the harness connector C – 56 pin 46 and ground.

3

With the aid of an assistant, monitor the voltage on the
multimeter and press and release the brake pedal.

•

With the brake pedal in the rest position, the multimeter
should display battery voltage

•

With the brake pedal pressed, the multimeter should
display 0 V.

Does the multimeter display as described?

Go to Step 28

Check for a blown

fuse C-10.

Check for short to

ground or open

circuit

Repair as required

(refer to Note 1).

Go to Step 32

Cruise Control – HFV6

Page 8C–19

Step Action

Yes

No

28 1

Disconnect the ECM connector C – 56.

2

Using a multimeter set to measure voltage, back probe between
the harness connector C – 56 pin 53 and ground.

3

With the aid of an assistant, monitor the voltage on the
multimeter and press and release the clutch pedal.

•

With the clutch pedal in the rest position, the multimeter
should display battery voltage

•

With the clutch pedal pressed, the multimeter should
display 0 V

Does the multimeter display as described?

Go to Step 31

Check for a blown

fuse C-4.

Check for short to

ground or open

circuit

Repair as required

(refer to Note 2).

Go to Step 32

29 Check all associated circuits and connectors for the following:

•

Loose or damaged connections

•

Intermittent faults.

Refer to the Wiring Diagrams in this Section and repair as required.

Was the repair completed?

Go to Step 32

—

30 Replace the PIM, refer to 6E1 Powertrain Interface Module – V6.

Was the repair completed?

Go to Step 32

—

31 Replace the ECM module, refer to 6C1-3 Engine Management – V6

Service Operations.

Was the repair completed?

Go to Step 32

—

32 Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1

When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.

Cruise Control – HFV6

Page 8C–20

3 Service

Operations

3.1

Cruise Control Main Switch

Remove

To remove the cruise control main switch, refer to 8 B Cruise Control System.

Test

Test the cruise control main switch, using a multimeter set to measure ohms check the continuity.

Figure 8C – 8

Terminal Testing

Cruise Control Main Switch

Switch Terminals

Switch

Position

Indication if Switch

is Serviceable

1 and 2

Switch Illumination

Approx. 22 ohms

4 and 6

Cruise Lamp On Illumination

Approx. 22 ohms

4 and 3

Cruise Switch Released

Open circuit

4 and 3

Cruise Switch Pressed

Short circuit

Reinstall

To reinstall the cruise control main switch, refer to 8 B Cruise Control System.

Cruise Control – HFV6

Page 8C–21

3.2

Cruise Control Switch Assembly

Remove

To remove the cruise control switch assembly, refer to 8 B Cruise Control System.

Test

To test the cruise control switch assembly, use a multimeter to check the continuity.

1

Remove the lower dash trim panel and locate the
cruise control switch assembly wiring harness that
connects a white 13 pin male plug to a connector sub
panel located on the right hand side below of the
steering column.

2

Disconnect the 13 pin male plug B – 59 from its mating
connector socket.

3

Place the turn signal and cruise control switch
assembly into the positions detailed in the following
table, refer to Terminal Testing. Position the contacts
of the multimeter onto the terminals and take the
reading. Compare the multimeter readings with the
values in the table.

4

If the switch assembly fails any part of the test, replace
the cruise control switch assembly with a serviceable
item. To replace the switch assembly, refer to 8 B
Cruise Control System.

Figure 8C – 9

Terminal Testing

Cruise Control Switch Assembly

Switch Terminals

Switch

Position

Indication if Switch

is Serviceable

11 and 10

CANCEL Applied

Open Circuit

11 and 10

CANCEL Released

Short Circuit

11 and 12

SET–COAST Pressed

Short Circuit

11 and 12

SET–COAST Released

Open Circuit

11 and 9

RES–ACC Applied

Short Circuit

11 and 9

RES–ACC Released

Open Circuit

Reinstall

To reinstall the cruise control switch assembly, refer to 8 B Cruise Control System.