LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2023 >> Camaro ZL1, 2D Convertible, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (Automatic Transmission - 8L45 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0960, P0962-P0964, P0966-P0968, P0970, P0971, P2670, P2671, P2736, P2738, P2739, P2812, P2814, P2815, P2824, P2826, or P2827 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: X175@T12 Automatic Transmission Assembly
    3. NOTE:

    All testing for this procedure is performed on the control module K71 side of the circuit.

  3. Connect a test lamp between the test points: Control circuit terminal 19 & Ground
  4. Ignition - On/Vehicle - In Service Mode
    5. NOTE:

    If unable to perform the scan tool control function due to Device Limits Exceeded and/or DTC Present, jumper the component B14A circuits between the component T12 connector and the X175 harness connector.

    • Connect a 3 A fused jumper wire between the test points: 9 V Reference circuit terminal 25 X175(harness side) & 9 V Reference circuit terminal 25 X175(component side)
    • Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 24 X175(harness side) & Signal circuit terminal 24 X175(component side)
  5. Perform the scan tool control function: High Side Driver - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector: K71 Transmission Control Module
    3. Test for infinite resistance between the test points: Control circuit terminal 19 @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: Control circuit terminal 19@Component harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K71 Transmission Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector: K71 Transmission Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Control circuit terminal 19@Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K71 Transmission Control Module
    • Go to next step: If the test lamp turns On and Off 
  6. Verify DTC P2670, P2671 is not set.
    • If the DTC is set 

      Refer to step 9

    • Go to next step: If the DTC is not set 
  7. Connect a test lamp between the test points:
    • {P0960, P0962, P0963} Control circuit terminal 5 & Control circuit terminal 19@Component harness
    • {P0964, P0966, P0967} Control circuit terminal 6 & Control circuit terminal 19@Component harness
    • {P0968, P0970, P0971} Control circuit terminal 10 & Control circuit terminal 19@Component harness
    • {P2736, P2738, P2739} Control circuit terminal 4 & Control circuit terminal 19@Component harness
    • {P2812, P2814, P2815} Control circuit terminal 3 & Control circuit terminal 19@Component harness
    • {P2824, P2826, P2827} Control circuit terminal 7 & Control circuit terminal 19@Component harness
  8. Perform the scan tool control function: Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector: K71 Transmission Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • {P0960, P0962, P0963} Control circuit terminal 5@Component harness & Ground
      • {P0964, P0966, P0967} Control circuit terminal 6@Component harness & Ground
      • {P0968, P0970, P0971} Control circuit terminal 10@Component harness & Ground
      • {P2736, P2738, P2739} Control circuit terminal 4@Component harness & Ground
      • {P2812, P2814, P2815} Control circuit terminal 3@Component harness & Ground
      • {P2824, P2826, P2827} Control circuit terminal 7@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:
      • {P0960, P0962, P0963} Control circuit terminal 5@Component harness & The other end of the circuit
      • {P0964, P0966, P0967} Control circuit terminal 6@Component harness & The other end of the circuit
      • {P0968, P0970, P0971} Control circuit terminal 10@Component harness & The other end of the circuit
      • {P2736, P2738, P2739} Control circuit terminal 4@Component harness & The other end of the circuit
      • {P2812, P2814, P2815} Control circuit terminal 3@Component harness & The other end of the circuit
      • {P2824, P2826, P2827} Control circuit terminal 7@Component harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K71 Transmission Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector: K71 Transmission Control Module
    3. Test for infinite resistance between the test points:
      • {P0960, P0962, P0963} Control circuit terminal 5@Component harness & Ground
      • {P0964, P0966, P0967} Control circuit terminal 6@Component harness & Ground
      • {P0968, P0970, P0971} Control circuit terminal 10@Component harness & Ground
      • {P2736, P2738, P2739} Control circuit terminal 4@Component harness & Ground
      • {P2812, P2814, P2815} Control circuit terminal 3@Component harness & Ground
      • {P2824, P2826, P2827} Control circuit terminal 7@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K71 Transmission Control Module
    • Go to next step: If the test lamp turns On and Off 
  9. Connect the electrical connector: X175@T12 Automatic Transmission Assembly
  10. Remove the component: Transmission Fluid Pan
  11. Disconnect the electrical connector: X176
  12. Connect a test lamp between the test points:
    • {P0960, P0962, P0963} Control circuit terminal 5 & Control circuit terminal 18@Component harness
    • {P0964, P0966, P0967} Control circuit terminal 6 & Control circuit terminal 18@Component harness
    • {P0968, P0970, P0971} Control circuit terminal 10 & Control circuit terminal 18@Component harness
    • {P2736, P2738, P2739} Control circuit terminal 4 & Control circuit terminal 18@Component harness
    • {P2812, P2814, P2815} Control circuit terminal 3 & Control circuit terminal 18@Component harness
    • {P2824, P2826, P2827} Control circuit terminal 7 & Control circuit terminal 18@Component harness
  13. Perform the scan tool control function: Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp does not turn On and Off 

      Replace the component: Automatic Transmission Wiring Harness

    • Go to next step: If the test lamp turns On and Off 
  14. Connect the electrical connector: X176
  15. Disconnect the appropriate electrical connector: Q77 Transmission Control Solenoid Valve
  16. Verify a test lamp turns On between the test points: Control circuit terminal 2 & Control circuit terminal 1@
    • If the test lamp does not turn On and Off 

      Replace the component: Automatic Transmission Control Wiring Harness

    • Go to next step: If the test lamp turns On and Off 
  17. Replace the appropriate component: Q77 Transmission Control Solenoid Valve
scientia non olet · About LEMON Manuals