Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 1179
BRAKE CONTROL SYSTEM
5A–45
Chart B-13 FR Isolation Solenoid Coil Failure (DTC 43 (Flash out) / C0241, C0243 (Serial
communications))
Chart B-14 FR Dump Solenoid Coil Failure (DTC 44(Flash out) / C0242, C0244 (Serial
communications))
Chart B-15 Rear Isolation Solenoid Coil Failure (DTC 45 (Flash out) / C0251, C0253 (Serial
communications))
Step
Action
Yes
No
1 Was
the
“EHCU Connector Pin–out Checks” performed?
Go to Step 2
Go to “EHCU
Connector Pin–out
Checks.”
2
1. Turn the key switch to off.
2. Disconnect the 2–way EHCU connector (C–5) from the
EHCU.
3. Inspect the connector for damage or corrosion.
Is the connector free from damage or corrosion?
Go to Step 3
Repair the
connector. Repeat
the “Basic
Diagnostic Flow
Chart.”
3
1. Replace the Coil Integrated Module.
2. Reconnect all components, ensure all components are
properly mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
Step
Action
Yes
No
1 Was
the
“EHCU Connector Pin–out Checks” performed?
Go to Step 2
Go to “EHCU
Connector Pin–out
Checks.”
2
1. Turn the key switch to off.
2. Disconnect the 2–way EHCU connector (C–5) from the
EHCU.
3. Inspect the connector for damage or corrosion.
Is the connector free from damage or corrosion?
Go to Step 3
Repair the
connector. Repeat
the “Basic
Diagnostic Flow
Chart.”
3
1. Replace the Coil Integrated Module.
2. Reconnect all components, ensure all components are
properly mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
Step
Action
Yes
No
1 Was
the
“EHCU Connector Pin–out Checks” performed?
Go to Step 2
Go to “EHCU
Connector Pin–out
Checks.”
2
1. Turn the key switch to off.
2. Disconnect the 2–way EHCU connector (C–5) from the
EHCU.
3. Inspect the connector for damage or corrosion.
Is the connector free from damage or corrosion?
Go to Step 3
Repair the
connector. Repeat
the “Basic
Diagnostic Flow
Chart.”
3
1. Replace the Coil Integrated Module.
2. Reconnect all components, ensure all components are
properly mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
5A–46
BRAKE CONTROL SYSTEM
Chart B-16 Rear Dump Solenoid Coil Failure (DTC 46 (Flash out) / C0252, C0254 (Serial
communications))
Chart B-17 FL Speed Sensor Open or Shorted (DTC 51 (Flash out) / C0225 (Serial
communications))
Step
Action
Yes
No
1 Was
the
“EHCU Connector Pin–out Checks” performed?
Go to Step 2
Go to “EHCU
Connector Pin–out
Checks.”
2
1. Turn the key switch to off.
2. Disconnect the 2–way EHCU connector (C–5) from the
EHCU.
3. Inspect the connector for damage or corrosion.
Is the connector free from damage or corrosion?
Go to Step 3
Repair the
connector. Repeat
the “Basic
Diagnostic Flow
Chart.”
3
1. Replace the Coil Integrated Module.
2. Reconnect all components, ensure all components are
properly mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
Step
Action
Yes
No
1
1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the resistance between coil integrated module
connector (C-4) terminals 2 and 10.
Is the resistance between 2.0k and 2.8k ohms?(2WD model)
Is the resistance between 0.7k and 1.5k ohms?(4WD model)
Check for faults
in harness
between speed
sensor and coil
integrated
module.
Fault found:
Repair, and
perform system
self-check.
No fault found:
Replace coil
integrated
module.
Go to Step 3
Go to Step 2
2
Measure the FL speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms?(2WD model)
Is the resistance between 0.7k and 1.5k ohms?(4WD model)
Repair harness
abnormality
between
sensors and
coil integrated
module.
Go to Step 3
Replace
sensor.
Go to Step 3
3
1. Reconnect all components, ensure all components are
properly mounted.
2. Clear diagnostic trouble code.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
BRAKE CONTROL SYSTEM
5A–47
Chart B-18 FR Speed Sensor Open or Shorted (DTC 52 (Flash out) / C0221 (Serial
communications))
Step
Action
Yes
No
1
1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the resistance between coil integrated module
connector (C-4) terminals 3 and 11.
Is the resistance between 2.0k and 2.8k ohms?(2WD model)
Is the resistance between 0.7k and 1.5k ohms?(4WD model)
Check for faults
in harness
between speed
sensor and coil
integrated
module.
Fault found:
Repair, and
perform system
self-check.
No fault found:
Replace coil
integrated
module.
Go to Step 3
Go to Step 2
2
Measure the FR speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms?(2WD model)
Is the resistance between 0.7k and 1.5k ohms?(4WD model)
Repair harness
abnormality
between
sensors and
coil integrated
module.
Go to Step 3
Replace
sensor.
Go to Step 3
3
1. Reconnect all components, ensure all components are
properly mounted.
2. Clear diagnostic trouble code.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
5A–48
BRAKE CONTROL SYSTEM
Chart B-19 Rear Speed Sensor Open or Shorted (DTC 53 (Flash out) / C0235 (Serial
communications))
Step
Action
Yes
No
1
1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the resistance between coil integrated module
connector (C-4) terminals 4 and 12.
Is the resistance between 1.0k and 1.7k ohms?
Check for faults
in harness
between speed
sensor and coil
integrated
module.
Fault found:
Repair, and
perform system
self-check.
No fault found:
Replace EHCU.
Go to Step 3
Go to Step 2
2
Measure the Rear speed sensor resistance at the sensor
connector.
Is the resistance between 1.0k and 1.7k ohms?
Repair harness
abnormality
between
sensors and
coil integrated
module.
Go to Step 3
Replace
sensor.
Go to Step 3
3
1. Reconnect all components, ensure all components are
properly mounted.
2. Clear diagnostic trouble code.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 3
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