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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Power Seat System) >> Diagnostic Information and Procedures >> DTC B1405, B1825, B2355, B2365, or B2375 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Test 1

  1. Disconnect the electrical connector:M50D Seat Front Vertical Motor - Driver
  2. Ignition - On / Vehicle - In Service Mode
  3. Operate the component:Seat Adjuster Switch - Press and hold the switch
  4. Test for greater than 10.8 V between the test points:12 V Reference terminal 2@Component harness & Ground
    • If 10.8 V or less 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for infinite resistance between the test points:12 V Reference terminal 2@Component harness & Ground
      • If less than infinite resistance and there are components connected to the circuit - Disconnect a component and repeat the test.
      • If less than infinite resistance with all components disconnected from the circuit - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:12 V Reference terminal 2@Component harness & Terminal 1 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If greater than 10.8 V 
  5. Ignition/Vehicle - Off
  6. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
  7. Ignition - On / Vehicle - In Service Mode
  8. Test for less than 1 V between the test points:
    • Signal circuit terminal 11 & Ground
    • Signal circuit terminal 12 & Ground
    • Signal circuit terminal 25 & Ground
    • Signal circuit terminal 26 & Ground
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  9. Replace the component:K40D Seat Memory Control Module - Driver

Test 2

  1. Disconnect the electrical connector:M56D Seat Recline Motor - Driver
  2. Ignition - On / Vehicle - In Service Mode
  3. Operate the component:Seat Adjuster Switch - Press and hold the switch
  4. Test for greater than 10.8 V between the test points:12 V Reference terminal 2@Component harness & Ground
    • If 10.8 V or less 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for less than 2 ohms between the test points:12 V Reference terminal 2@Component harness & Terminal 1 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If greater than 10.8 V 
  5. Test for 0.2 to 2 V between the test points:Signal circuit terminal 4@Component harness & Ground
    • If less than 0.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for infinite resistance between the test points:Signal circuit terminal 4@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:Signal circuit terminal 4@Component harness & Terminal 26 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • If greater than 2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • Signal circuit terminal 11 & Ground
      • Signal circuit terminal 12 & Ground
      • Signal circuit terminal 25 & Ground
      • Signal circuit terminal 26 & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If between 0.2 and 2 V 
  6. Test or replace the component:M56D Seat Recline Motor - Driver

Test 3

  1. Disconnect the electrical connector:M50D Seat Front Vertical Motor - Driver
  2. Ignition - On / Vehicle - In Service Mode
  3. Operate the component:Seat Adjuster Switch - Press and hold the switch
  4. Test for greater than 10.8 V between the test points:12 V Reference terminal 2@Component harness & Ground
    • If 10.8 V or less 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for less than 2 ohms between the test points:12 V Reference terminal 2@Component harness & Terminal 1 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If greater than 10.8 V 
  5. Test for 0.2 to 2 V between the test points:Signal circuit terminal 4@Component harness & Ground
    • If less than 0.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for infinite resistance between the test points:Signal circuit terminal 4@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:Signal circuit terminal 4@Component harness & Terminal 12 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • If greater than 2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • Signal circuit terminal 11 & Ground
      • Signal circuit terminal 12 & Ground
      • Signal circuit terminal 25 & Ground
      • Signal circuit terminal 26 & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If between 0.2 and 2 V 
  6. Test or replace the component:M50D Seat Front Vertical Motor - Driver

Test 4

  1. Disconnect the electrical connector:M55D Seat Rear Vertical Motor - Driver
  2. Ignition - On / Vehicle - In Service Mode
  3. Operate the component:Seat Adjuster Switch - Press and hold the switch
  4. Test for greater than 10.8 V between the test points:12 V Reference terminal 4@Component harness & Ground
    • If 10.8 V or less 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for less than 2 ohms between the test points:12 V Reference terminal 4@Component harness & Terminal 1 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If greater than 10.8 V 
  5. Test for 0.2 to 2 V between the test points:Signal circuit terminal 2@Component harness & Ground
    • If less than 0.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for infinite resistance between the test points:Signal circuit terminal 2@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:Signal circuit terminal 2@Component harness & Terminal 25 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • If greater than 2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • Signal circuit terminal 11 & Ground
      • Signal circuit terminal 12 & Ground
      • Signal circuit terminal 25 & Ground
      • Signal circuit terminal 26 & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If between 0.2 and 2 V 
  6. Test or replace the component:M55D Seat Rear Vertical Motor - Driver

Test 5

  1. Disconnect the electrical connector:M51D Seat Horizontal Motor - Driver
  2. Ignition - On / Vehicle - In Service Mode
  3. Operate the component:Seat Adjuster Switch - Press and hold the switch
  4. Test for greater than 10.8 V between the test points:12 V Reference terminal 4@Component harness & Ground
    • If 10.8 V or less 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for less than 2 ohms between the test points:12 V Reference terminal 4@Component harness & Terminal 1 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If greater than 10.8 V 
  5. Test for 0.2 to 2 V between the test points:Signal circuit terminal 2@Component harness & Ground
    • If less than 0.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Test for infinite resistance between the test points:Signal circuit terminal 2@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:Signal circuit terminal 2@Component harness & Terminal 11 X5@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • If greater than 2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:X5@K40D Seat Memory Control Module - Driver
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • Signal circuit terminal 11 & Ground
      • Signal circuit terminal 12 & Ground
      • Signal circuit terminal 25 & Ground
      • Signal circuit terminal 26 & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 ohms - Replace the component:K40D Seat Memory Control Module - Driver
    • Go to next step: If between 0.2 and 2 V 
  6. Test or replace the component:M51D Seat Horizontal Motor - Driver
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