Isuzu Rodeo UE. Manual — part 106
5A–47
BRAKE CONTROL SYSTEM
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?
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?
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 1.2k and 2.0k 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 1.2k and 2.0k 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
5A–49
BRAKE CONTROL SYSTEM
Chart B-20 FL Speed Sensor Missing (DTC 61 (Flash out) / C0226, C0227 (Serial
communications))
Step
Action
Yes
No
1
1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the FL speed sensor resistance between coil
integrated module connector (C-4) terminals 2 and 10.
Is the resistance between 2.0k and 2.8k ohms?
Go to Step 2
Go to Step 3
2
Is there play sensor/sensor rotor?
Repair.
Go to Step 6
Go to Step 4
3
Measure the FL speed sensor resistance at the sensor connector.
Is the resistance between 2.0k and 2.8k ohms?
Repair harness
abnormality
between sensors
and coil
integrated
module.
Go to Step 6
Replace sensor.
Go to Step 6
4
Damage and powered iron sticking to sensor/sensor ring?
Repair.
Go to Step 6
Go to Step 5
5
Is sensor output normal? (Chart C-1-1 or TC-1)
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 6
Replace sensor.
Go to Step 6
6
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 6
NOTE: Even after repairing the faulty part the warning
light (W/L) does not go out if the vehicle is at a stop. Turn
the ignition switch to the ON position and drive the vehicle
at 12 km/h (8 mph) or higher to make sure that the
warning light goes out.
5A–50
BRAKE CONTROL SYSTEM
Chart B-21 FR Speed Sensor Missing (DTC 62 (Flash out) / C0222, C0223 (Serial
communications))
Step
Action
Yes
No
1
1. Turn the key off.
2. Disconnect coil integrated module connector.
3. Measure the FR speed sensor resistance between coil
integrated module connector (C-4) terminals 3 and 11.
Is the resistance between 2.0k and 2.8k ohms?
Go to Step 2
Go to Step 3
2
Is there play sensor/sensor rotor?
Repair.
Go to Step 6
Go to Step 4
3
Measure the FR speed sensor resistance at the sensor
connector.
Is the resistance between 2.0k and 2.8k ohms?
Repair harness
abnormality
between sensors
and coil
integrated
module.
Go to Step 6
Replace sensor.
Go to Step 6
4
Damage and powered iron sticking to sensor/sensor ring?
Repair.
Go to Step 6
Go to Step 5
5
Is sensor output normal? (Chart C-1-2 or TC-1)
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 6
Replace sensor.
Go to Step 6
6
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 6
NOTE: Even after repairing the faulty part the warning
light (W/L) does not go out if the vehicle is at a stop. Turn
the ignition switch to the ON position and drive the vehicle
at 12 km/h (8 mph) or higher to make sure that the
warning light goes out.
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