Suzuki XL7 2007 Service Manual page 1848

7A-34 Heating, Ventilation and Air Conditioning:
Conditions for Clearing the DTC
• The history DTC will clear after 40 consecutive
ignition cycles have occurred without a malfunction.
• The DTC or DTC's can be cleared by using the scan
tool.
• The DTC will become history if the ECM no longer
detects a failure.
Diagnostic Aids
A malfunction within the refrigerant system causing high
pressure can cause this DTC to set.
Reference Information
Schematic Reference
"HVAC Schematics"
Connector End View Reference
"HVAC Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Scan Tool Reference
• "Scan Tool Output Controls - HVAC - Automatic"
• "Scan Tool Data List - HVAC - Automatic"
Circuit/System Verification
Ignition ON, observe the scan tool A/C High Side
Pressure parameter in the ECM. The reading should be
between 0.1 and 4.90 volts (1 and 425 psi), and change
with pressure.
Circuit/System Testing
1. Ignition OFF, disconnect the A/C Refrigerant
Pressure harness connector at the A/C Refrigerant
Pressure Sensor.
2. Ignition OFF, test for less than 1.0 ohm of resistance
between the low reference circuit terminal and
ground.
➢ If greater than 1.0 ohm, test the low reference
circuit for an open/high resistance. If the circuit
tests normal, replace the ECM.
3. Ignition ON, test for 4.8 - 5.2 volts between the 5-volt
reference circuit terminal and ground.
➢ If less than 4.8 volts, test the 5-volt reference circuit
for a short to ground or an open/high resistance. If
the circuit tests normal, replace the ECM.
➢ If greater than 5.2 volts, test the 5-volt reference
circuit for a short to voltage. If the circuit tests
normal, replace the ECM.
4. Verify the scan tool A/C High Side Pressure Sensor
parameter is less than 0.1 volts (1 psi).
➢ If greater than 0.1 volts (1 psi), test the signal circuit
terminal for a short to voltage. If the circuit tests
normal, replace the ECM.
5. Install a 3-amp fused jumper wire between the signal
circuit and the 5-volt reference circuit terminal. Verify
the scan tool A/C Refrigerant High Side Pressure
Sensor is greater than 4.90 volts (425 psi).
➢ If less than 4.90 volts (425 psi), test the signal
circuit for a short to ground or an open/high
resistance. If the circuit tests normal, replace the
ECM.
6. If all circuits test normal, replace the A/C Refrigerant
Pressure Sensor.
Repair Instructions
NOTE
Always perform "Diagnostic Repair
Verification - Vehicle Diagnostic Information:
" after completing the diagnostic procedure.
• "Air Conditioning (A/C) Refrigerant Pressure Sensor
Replacement"
• "Control Module References: " for the ECM setup,
replacement, and programming.