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Home >> Chevrolet >> 2020 >> Trax LS, AWD >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> Door Ajar Indicator Malfunction >> Circuit/System Testing

Circuit/System Testing

Test 1

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: A23D Door Latch Assembly - Driver
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 8 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 8 @ Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter:
    • Body Control Module: Driver Door Ajar Switch = Inactive
    • {N06} Keyless Entry Control Module: Driver Door Open Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector.
      • M74D Window Motor - Driver
      • K84 Keyless Entry Control Module
    3. Test for infinite resistance between the test points:
      • {N06} Signal circuit terminal 7 @ Component harness & Ground
      • Signal circuit terminal 6 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: M74D Window Motor - Driver or K84 Keyless Entry Control Module
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points:
    • {N06} Signal circuit terminal 7 & Ground circuit terminal 8
    • Signal circuit terminal 6 & Ground circuit terminal 8
  7. Verify the scan tool parameter:
    • Body Control Module: Driver Door Ajar Switch = Active
    • Keyless Entry Control Module: Driver Door Open Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: M74D Window Motor - Driver or K84 Keyless Entry Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • {N06} Signal circuit terminal 7 @ Component harness & Ground
      • Signal circuit terminal 6 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points:
      • {N06} Signal circuit terminal 7 @ Component harness & Signal circuit terminal 9 X1 @ K84 Keyless Entry Control Module
      • Signal circuit terminal 6 @ Component harness & Signal circuit terminal 6 @ M74D Window Motor - Driver
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: M74D Window Motor - Driver or K84 Keyless Entry Control Module
    • Go to next step: If the specified state 
  8. Test or replace the component: A23D Door Latch Assembly - Driver

Test 2

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: A23P Door Latch Assembly - Passenger
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 3 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 3 @ Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Passenger Door Ajar Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector. S79P Window Switch - Passenger
    3. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S79P Window Switch - Passenger
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 1 & Ground circuit terminal 3
  7. Verify the scan tool parameter: Passenger Door Ajar Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S79P Window Switch - Passenger
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 1 @ Component harness & Signal circuit terminal 6 @ S79P Window Switch - Passenger
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S79P Window Switch - Passenger
    • Go to next step: If the specified state 
  8. Test or replace the component: A23P Door Latch Assembly - Passenger

Test 3

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: A23LR Door Latch Assembly - Left Rear
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 8 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 8 @ Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Left Rear Door Ajar Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: S79LR Window Switch - Left Rear
    3. Test for infinite resistance between the test points: Signal circuit terminal 6 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S79LR Window Switch - Left Rear
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 6 & Ground circuit terminal 8
  7. Verify the scan tool parameter: Left Rear Door Ajar Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S79LR Window Switch - Left Rear
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 6 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 6 @ Component harness & Terminal 2 @ S79LR Window Switch - Left Rear
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S79LR Window Switch - Left Rear
    • Go to next step: If the specified state 
  8. Test or replace the component: A23LR Door Latch Assembly - Left Rear

Test 4

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: A23RR Door Latch Assembly - Right Rear
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 3 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 3 @ Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Right Rear Door Ajar Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: S79RR Window Switch - Right Rear
    3. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S79RR Window Switch - Right Rear
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 1 & Ground circuit terminal 3
  7. Verify the scan tool parameter: Right Rear Door Ajar Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S79RR Window Switch - Right Rear
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 1 @ Component harness & Terminal 2 @ S79RR Window Switch - Right Rear
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S79RR Window Switch - Right Rear
    • Go to next step: If the specified state 
  8. Test or replace the component: A23RR Door Latch Assembly - Right Rear

Test 5

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M30 Liftgate Latch
  3. Ignition - On/Vehicle - In Service Mode
  4. Verify the scan tool parameter: Rear Closure Ajar Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: K9 Body Control Module
    3. Test for infinite resistance between the test points: Signal circuit terminal 2 @ M30 Liftgate Latch Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K9 Body Control Module
    • Go to next step: If the specified state 
  5. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 2 & Ground circuit terminal 1 @ M30 Liftgate Latch
  6. Verify the scan tool parameter: Rear Closure Ajar Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: K9 Body Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 2 @ M30 Liftgate Latch Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 2 @ M30 Liftgate Latch Component harness & Terminal 5 X6 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K9 Body Control Module
    • Go to next step: If the specified state 
  7. Test or replace the component: M30 Liftgate Latch
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