C1082
C1082 - Vacuum Pressure Sensor Circuit
For a complete wiring diagram, refer to.
• When Monitored: With the ignition ON.
• Set Condition: When the anti lock brake module indicates that the vacuum pressure sensor signal is out of range.
Test Step 1 - Test for A DTC C1082 - Vacuum Pressure Sensor Circuit
• This DTC must be active for the results of this test to be valid.
• Turn the ignition ON.
• With the scan tool, read and record the DTCs.
• With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
• With the scan tool, erase the DTCs.
• Start the engine.
• Attempt to operate the vehicle under conditions similar to which the DTC was set. It may be necessary to test drive the vehicle within the DTC monitoring and set conditions in order for this DTC to set.
• Depress and release the brake pedal.
• With the scan tool, read and record the DTCs.
Does the scan tool display C1082 - Vacuum Pressure Sensor Circuit?
Yes
• Go to Test Step 2 => [ Test Step 2 - Test the Terminals/Connectors/Wiring Harness for Damage ]
No
• Perform the ABS Intermittent Condition Test. Refer to => Non-DTC Based Diagnostics. ABS Intermittent Condition Test
Test Step 2 - Test the Terminals/Connectors/Wiring Harness for Damage
• Turn the ignition OFF.
• Test all related wiring for bruised, chafed, pierced, or partially broken wires.
• Test all related connectors for broken, bent, pushed out, or corroded terminals.
Were any problems found?
Yes
• Repair as necessary.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
No
• Go to Test Step 3 => [ Test Step 3 - Vacuum Pressure Sensor Supply Circuit ]
Test Step 3 - Vacuum Pressure Sensor Supply Circuit
• Disconnect the vacuum pressure sensor harness connector.
• Turn ignition ON.
• Using a voltmeter, measure the voltage of vacuum pressure sensor supply circuit at the vacuum pressure sensor harness connector.
Is the voltage between 4.75 to 5.2 volts?
Yes
• Go to Test Step 6 => [ Test Step 6 - Vacuum Pressure Sensor Return Circuit Open ]
No
• Go to Test Step 4 => [ Test Step 4 - Vacuum Pressure Sensor Supply Circuit Open ]
Test Step 4 - Vacuum Pressure Sensor Supply Circuit Open
• Turn ignition OFF.
• Disconnect the anti lock module harness connector.
• Measure the resistance of the vacuum pressure sensor supply circuit from the vacuum pressure sensor harness connector to the anti lock brake module harness connector.
Is the resistance less than 5.0 Ohms?
Yes
• Go to Test Step 5 => [ Test Step 5 - Vacuum Pressure Sensor Supply Circuit Short to Ground ]
No
• Repair the vacuum pressure sensor supply circuit for an open.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
Test Step 5 - Vacuum Pressure Sensor Supply Circuit Short to Ground
• Measure the resistance between ground and the vacuum pressure sensor supply circuit at the vacuum pressure sensor harness connector.
Is the resistance less than 5.0 Ohms?
Yes
• Repair the vacuum pressure sensor supply circuit for a short to ground.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
No
• Replace the anti lock brake module.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
Test Step 6 - Vacuum Pressure Sensor Return Circuit Open
• Measure the resistance of the vacuum pressure sensor return circuit from the vacuum pressure harness connector to the anti lock brake module harness connector.
Is the resistance less than 5.0 Ohms?
Yes
• Go to Test Step 7 => [ Test Step 7 - Vacuum Pressure Sensor Signal Circuit ]
No
• Repair the vacuum pressure sensor return circuit for an open.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
Test Step 7 - Vacuum Pressure Sensor Signal Circuit
• Turn ignition OFF.
• Reconnect vacuum pressure sensor harness connector.
• Reconnect anti lock brake module harness connector.
• Care should be taken to preserve connector seal when back probing the harness connector.
• Back probe vacuum pressure sensor signal at the vacuum pressure sensor.
• Turn ignition ON.
• Measure the voltage of the vacuum pressure sensor signal circuit at the vacuum pressure sensor harness connector.
Is the voltage between.4 volts and 4.5 volts?
Yes
• Replace the anti lock brake module.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
No
• Go to Test Step 8 => [ Test Step 8 - Vacuum Pressure Sensor Signal Circuit Short to Voltage ]
Test Step 8 - Vacuum Pressure Sensor Signal Circuit Short to Voltage
• Turn ignition ON.
• Measure the voltage of the vacuum pressure sensor signal circuit at the vacuum pressure sensor harness connector.
Is the voltage greater than 4.5 volts?
Yes
• Repair the vacuum pressure sensor signal circuit for a short to voltage.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
No
• Go to Test Step 9 => [ Test Step 9 - Vacuum Pressure Sensor Signal Circuit Open ]
Test Step 9 - Vacuum Pressure Sensor Signal Circuit Open
• Turn ignition OFF.
• Disconnect vacuum pressure sensor harness connector.
• Disconnect anti lock brake module harness connector.
• Measure the resistance of the vacuum pressure sensor signal circuit from the vacuum pressure sensor to the anti lock brake module harness connector.
Is the resistance less than 5.0 Ohms?
Yes
• Go to Test Step 10 => [ Test Step 10 - Vacuum Pressure Sensor Signal Circuit Short to Ground ]
No
• Repair the vacuum pressure sensor signal circuit for an open.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
Test Step 10 - Vacuum Pressure Sensor Signal Circuit Short to Ground
• Measure the resistance between ground and the vacuum pressure sensor signal circuit at the vacuum pressure sensor harness connector.
Is the resistance less than 5.0 Ohms?
Yes
• Repair the vacuum pressure sensor signal circuit for a short to ground.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test
No
• Replace the vacuum pressure sensor.
• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test