Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 161
5A–22
BRAKE CONTROL SYSTEM
F05R200006
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
5A–23
BRAKE CONTROL SYSTEM
Basic Inspection Procedure
1. Basic Inspection of Service Brake
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
2. Ground Inspection
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
D
Disconnect Electronic Hydraulic Control Module.
D
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–6)
7 (C–6)
0V to 0.1V
ON
20DCV
1 (C–6)
7 (C–6)
11.5V to 14.5V
3
Stoplamp switch
OFF
20DCV
13 (C–6)
7 (C–6)
10.5V to 14.5V
Press brake pedal
4
Ground connection
OFF
200
W
7 (C–6)
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–6)
10 (C–6)
2.0k
W
to 2.8k
W
Internal Resistance
OFF
200k
W
2 (C–6)
7 (C–6)
more than
100k
W
Insulation Resistance
OFF
200mACV
2 (C–6)
10 (C–6)
more than
200mV
Turn wheel at 1RPS
6
FR speed sensor
OFF
2k
W
3 (C–6)
11 (C–6)
2.0k
W
to 2.8k
W
Internal Resistance
OFF
200k
W
3 (C–6)
7 (C–6)
more than
100k
W
Insulation Resistance
OFF
200mACV
3 (C–6)
11 (C–6)
more than
200mV
Turn wheel at 1RPS
7
RR speed sensor
OFF
2k
W
4 (C–6)
12 (C–6)
1.2k
W
to 2.0k
W
Internal Resistance
OFF
200k
W
4 (C–6)
7 (C–6)
more than
100k
W
Insulation Resistance
OFF
200mACV
4 (C–6)
12 (C–6)
more than
200mV
Turn wheel at 1RPS
5A–25
BRAKE CONTROL SYSTEM
Circuit Diagram
D05R200004
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