Power Windows Malfunction (Driver Window Express Up/Down)
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Power Windows Malfunction (Driver Window Express Up/Down)
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Driver Window Switch B+
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1
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1
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-
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-
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Driver Window Motor B+
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U1534 00
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U1534 00
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-
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-
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Driver Window Motor Down Control
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B316B 02
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1
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1
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-
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Driver Window Motor Express Control
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B316B 02
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1
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1
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-
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Driver Window Motor Up Control
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B316B 02
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1
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1
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-
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Driver Window Motor Ground
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-
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U1534 00
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-
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-
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Driver Window Switch Ground
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-
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1
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-
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-
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1. Driver Window Malfunction
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Circuit/System Description
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The driver side window consists of a driver window switch and a window motor capable of express up and express down functions. When the driver window switch is pressed or pulled, the voltage within the appropriate signal circuit drops and the window motor will then perform the commanded function.
Failure of a window not completely closing or a window auto reversing when completely closed may have been caused by the following conditions:
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When the window glass has been replaced
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When the door has been replaced
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•
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When the window regulator has been replaced
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A relearn procedure may be necessary to correct for the above malfunctions. Refer to
Window Regulator Motor Programming and Setup
.
Schematic Reference
Moveable Window Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Power Windows Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
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Circuit/System Verification
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1.
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Ignition ON, command the M74D window motor-driver UP, DOWN, express UP and express DOWN with a scan tool. The M74D window motor-driver should perform the UP, DOWN, express UP and express DOWN commands.
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2.
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If the M74D window motor-driver does perform as specified, refer to Driver Window Motor Malfunction.
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3.
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Command the M74D window motor-driver UP, DOWN, express UP and express DOWN by using the S79D window switch-driver. The M74D window motor-driver should perform the UP, DOWN, express UP and express DOWN commands.
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4.
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If the M74d window motor-driver does perform as specified, refer to Driver Window Switch Malfunction.
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Driver Window Motor Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the M74D window motor-driver.
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2.
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Test for less than 5 Ω between the ground circuit terminal 1 and ground.
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
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5.
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If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
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6.
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If all circuits test normal, test or replace the M74D window motor-driver.
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Driver Power Window Switch Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
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2.
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Test for less than 5 Ω between the ground circuit terminal 1 and ground.
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3.
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If the value is greater than the specified range, test the ground circuit for and open circuit/high resistance.
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4.
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Ignition ON, verify that the scan tool Driver Window Main Control Down Switch parameter is Inactive.
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5.
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If not the specifed value, test the control circuit terminal 3 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
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6.
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Connect a 5A fused jumper wire between the control circuit terminal 3 and ground, verify that the scan tool Driver Window Main Control Down Switch parameter is Active.
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7.
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If not the specified value, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the M74D window motor-driver.
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8.
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Verify that the scan tool Driver Window Main Control Up Switch parameter is Inactive.
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9.
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If not the specifed value, test the control circuit terminal 6 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
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10.
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Connect a 5A fused jumper wire between the control circuit terminal 6 and ground, verify that the scan tool Driver Window Main Control Up Switch parameter is Active.
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11.
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If not the specified value, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the M74D window motor-driver.
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12.
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Verify that the scan tool Driver Window Main Control Express Switch parameter is Inactive.
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13.
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If not the specifed value, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
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14.
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Connect a 5A fused jumper wire between the control circuit terminal 2 and ground, verify that the scan tool Driver Window Main Control Express Switch parameter is Active.
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15.
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If not the specified value, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the M74D window motor-driver.
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16.
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If all circuits test normal, test or replace the S79D window switch-driver.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
