Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1173

BRAKE CONTROL SYSTEM

5A–21

Tech 2 Service Bleed

F05R200011

5A–22

BRAKE CONTROL SYSTEM

F05R200012

Basic Diagnostic Flow Chart

Step

Action

Yes

No

1 

1. Verify complaint with the customer.

2. Questioning to customer.

3. Basic inspection (Refer to Basic inspection procedure)

Using TECH 2?

Go to Step 2 

Go to Step 4 

2 

Verify DTC through: “F0: Diagnostic Trouble Codes.”
Is the DTC stored in the EHCU?

Clear code and 

check for 

repeatability.

Go to Step 3 

Go to Step 5 

3 

1. Repair of faulty part.

2. Clear DTC.

3. Inspection of “ABS” W/L Illumination pattern with ignition SW

“ON”.

4. Test drive.

Does trouble repeat?

Repeat the 

diagnosis it the 

symptom or DTC 

appears again

Go to Step 1

Go to Step 5 

4 

Verify DTC through: “F0: Diagnostic Trouble Codes.”
Is the DTC stored in the EHCU?

Clear code and 

check for 

repeatability

Go to Step 3 

Trouble diagnosis 

based on symptom 

(Refer to Symptom 

Diagnosis)

Go to Step 3

5 

1. Reconnect all components. Ensure that all component are

properly mounted.

2. Clear diagnostic trouble code.

Was this step finished?

Finished

Go to Step 5 

BRAKE CONTROL SYSTEM

5A–23

Basic Inspection Procedure

1. Basic Inspection of Service Brake

2. Ground Inspection

Step

Action

Yes

No

1 

Is the fluid level normal?

Go to Step 2 

Replenish with 

fluid

Go to Step 2 

2 

Does fluid leak?

Repair

Go to Step 3 

Go to Step 3 

3 

Is the booster functioning properly?

Go to Step 4

Repair

Go to Step 4

4 

Is the pad and rotor within specs?

Go to Step 5 

Repair

Go to Step 5 

5 

Reconnect all components. Ensure all component are properly
mounted.
Was this step finished?

Finished

Go to Step 5 

Step

Action

Yes

No

1 

Is there good contact with the ABS ground points?

Go to Step 2 

Repair

Go to Step 2

2 

Reconnect all components. Ensure that all component are
properly mounted.

Finished

Go to Step 2 

5A–24

BRAKE CONTROL SYSTEM

EHCU Connector Pin-out Checks

• Disconnect Electronic Hydraulic Control Module.

• Perform checks with high impedance digital

multimeter J-39200 or equivalent.

No.

Circuit to be Tested

Ignition 

Switch 

Position

Multimeter 

Scale/Range

Measure 

between Pin 

Number

Nominal Value

Note

1

Power supply

OFF

20DCV

1 (C–5)
2 (C–5)

11.5V to 14.5V

2

Ignition enable

OFF

20DCV

1 (C–4)
7 (C–4)

0V to 0.1V

ON

20DCV

1 (C–4)
7 (C–4)

11.5V to 14.5V

3

Stoplight switch

OFF

20DCV

13 (C–4)

 7 (C–4)

10.5V to 14.5V

Press brake pedal

4

Ground connection

OFF

200

W

7 (C–4)
Ground

Less than 2

W

OFF

1

W

2 (C–5)
Ground

Less than 0.2

W

5

FL speed sensor

OFF

2k

W

 2 (C–4)

10 (C–4)

2.0k

W to 2.8kW 

(2WD model)

0.7k

W to 1.5kW 

(4WD model)

Internal Resistance

OFF

200k

W

2 (C–4)
7 (C–4)

more than 

100k

W

Insulation Resistance

OFF

200mACV

 2 (C–4)

10 (C–4)

more than 

200mV

Turn wheel at 1RPS

6

FR speed sensor

OFF

2k

W

 3 (C–4)

11 (C–4)

2.0k

W to 2.8kW 

(2WD model)

0.7k

W to 1.5kW 

(4WD model)

Internal Resistance

OFF

200k

W

3 (C–4)
7 (C–4)

more than 

100k

W

Insulation Resistance

OFF

200mACV

 3 (C–4)

11 (C–4)

more than 

200mV

Turn wheel at 1RPS

7

RR speed sensor

OFF

2k

W

 4 (C–4)

12 (C–4)

1.0k

W to 1.7kW Internal Resistance

OFF

200k

W

4 (C–4)
7 (C–4)

more than 

100k

W

Insulation Resistance

OFF

200mACV

 4 (C–4)

12 (C–4)

more than 

200mV

Turn wheel at 1RPS