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Power Windows Malfunction — Driver Window Express Up and Down

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Driver Window Switch B+

1

1

--

--

Driver Window Motor B+

U1534 00

U1534 00

--

--

Driver Window Motor Down Control

B316B 02

1

1

--

Driver Window Motor Express Control

B316B 02

1

1

--

Driver Window Motor Up Control

B316B 02

1

1

--

Driver Window Motor Ground

--

U1534 00

--

--

Driver Window Switch Ground

--

1

--

--

1. Driver Window Malfunction

Circuit/System Description

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.

Diagnostic Aids

The loss of the express up and express down functions for the driver window may have occurred for the following reasons:

    • The battery was disconnected
    • The battery was replaced
    • The door wiring harness was disconnected
    • The window motor was disconnected

The driver window motor will need to be normalized in order to restore the express functions, refer to Window Motor Programming - Express Function for the proper procedure

Reference Information

Schematic Reference

Moveable Window Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. 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.
    2. ⇒If the M74D window motor - driver does perform as specified, refer to Driver Window Motor Malfunction.
  2. 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.
    3. ⇒If the M74D window motor - driver does perform as specified, refer to Driver Window Switch Malfunction.

Circuit/System Testing

Driver Window Motor Malfunction

  1. Ignition OFF, disconnect the harness connector at the M74D window motor - driver.
  2. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    4. ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, test or replace the M74D window motor - driver.

Driver Window Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the S79D window switch - driver.
  2. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for and open/high resistance.
  3. Ignition ON, verify that the scan tool Driver Window Main Control Down Switch parameter is Inactive.
    4. ⇒If not the specified 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.
  4. Connect a 5 A 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.
    5. ⇒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.
  5. Verify that the scan tool Driver Window Main Control Up Switch parameter is Inactive.
    6. ⇒If not the specified 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.
  6. Connect a 5 A 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.
    7. ⇒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.
  7. Verify that the scan tool Driver Window Main Control Express Switch parameter is Inactive.
    8. ⇒If not the specified 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.
  8. Connect a 5 A 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.
    9. ⇒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.
  9. If all circuits test normal, test or replace the S79D window switch - driver.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Front Side Door Window Regulator Replacement
    •  Front Side Door Window and Multifunction Switch Replacement
   


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