Suzuki XL7 2007 Service Manual page 913

Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at
the battery current sensor.
2. Ignition OFF, test for less than 1.0 ohm of resistance
between the low reference circuit terminal B and
ground.
➢ If the greater than the specified range, test the low
reference circuit for an open/high resistance. If the
circuit tests normal replace the BCM.
3. Ignition ON, test for 4.8- 5.2 volts between the
battery current sensor supply voltage circuit terminal
A and ground.
➢ If less than the specified range, test the supply
voltage circuit for a short to ground or an open/high
resistance. If the circuit test normal replace the
BCM.
➢ If greater than specified range, test the supply
voltage circuit for a short to voltage.
4. Test for 4.8-5.2 volts between the battery current
sensor signal circuit terminal C and ground.
➢ If less than the specified range, test the signal
circuit for a short to ground or an open/high
resistance. If the circuit test normal replace the
BCM.
➢ If greater than specified range, test the signal circuit
for a short to voltage.
5. If all circuits test normal test or replace the battery
current sensor.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Control Module References: " for BCM replacement,
setup, and programming
• "Battery Current Sensor Replacement"
DTC B1517
Circuit Description
The body control module (BCM) has designated circuits
for monitoring vehicle system voltage. The BCM
monitors the system voltage to ensure that the voltage
stays within the proper range. Damage to components,
and incorrect data may occur when the voltage is out of
range. The BCM monitors the system voltage over an
extended length of time. If the BCM detects the system
voltage is outside an expected range for the calibrated
length of time, or the BCM battery sense circuits differ by
2 volts DTC B1517 will set. Other modules also monitor
system voltage the system voltage message is sent to
the other modules and will default to 12.9 volts.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1517 Battery Voltage
This vehicle has DTCs which include DTC symptoms.
For more information, refer to "DTC Symptom
Description - Vehicle Diagnostic Information: ".
DTC Symptom DTC Symptom Descriptor
03 Voltage Below Threshold
07 Voltage Above Threshold
5A Battery Voltage Plausibility Failure
Conditions for Running the DTC
This DTC shall run only if the BCM has power, ground,
and the ignition is not in START mode. This DTC shall
execute regardless of the battery voltage.
Conditions for Setting the DTC
• The battery voltage falls below 11 volts, engine speed
greater than 1,100 RPM for 15 seconds.
• The battery voltage is greater 16 volts, engine speed
greater than 1,100 RPM for 15 seconds.
• The battery voltage differs by 2 volts on the BCM
battery sense circuits for 10 seconds.
Action Taken When the DTC Sets
B1517 03
The Battery indicator turns ON, the driver information
center (DIC) displays the BATTERY NOT CHARGING
SERVICE CHARGING SYSTEM Message.
B1517 07
The Battery indicator turns ON, the DIC displays the
SERVICE BATTERY CHARGING SYSTEM Message.
B1517 5A
The Battery indicator turns ON, the DIC displays the
SERVICE VEHICLE SOON Message.
Conditions for Clearing the DTC
• The DTC will clear current status when the fault is no
longer present.
• A history DTC will clear after 50 consecutive ignition
cycles if the condition for the malfunction is no longer
present.
• Use a scan tool.
Test Description
The numbers below refer to the step numbers on the
diagnostic table.
3.
This step tests for the proper voltage at battery positive
voltage sense circuits of the BCM. If voltages are not
within the proper operating range, the voltage sense
circuits needs to be tested.
4.
This step tests the ground sense circuit of the BCM.
5.
This step tests for the proper voltage of the battery
sense circuits to the BCM. If voltage is not within the
proper operating range, the battery positive voltage and
ground circuits of the BCM need to be tested.
Charging System: 1J-20