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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Automatic Transmission -- AISIN -- 81-40LE -- Diagnosis (DTC P0562 To DTC P0743)) >> Diagnosis >> DTC P0743 (Non Europe or N. American Emissions) >> Cause of Failure

Cause of Failure

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0743 (Non Europe or N. American Emissions)

Step Action Values Yes No
1
  1. Turn OFF the ignition.
  2. Install the scan tool.
  3. With the engine OFF, turn the ignition switch to the ON position.
  4. Select Store Freeze Frame/Failure Records from the Diagnostic Trouble Codes Information menu.
  5. Store Freeze Frame/Failure Records.
  6. Select Clear DTC Information from the Diagnostic Trouble Codes Information menu.
  7. Clear DTC Information.
  8. Perform 2 vehicle drive cycles.
Is the hold lamp ON?		 - Go to Step 2  Go to Step 4 
2
  1. Select Request DTC by Status from the Diagnostic Trouble Codes Information menu.
  2. Request DTC by Status.
Is DTC P0743 displayed?		 - Go to Step 3  Go to Step 5 
3
  1. Turn OFF the ignition.
  2. Measure the resistance between the vehicle harness and lock-up solenoid. Refer to Shift Solenoid (1, 2), Timing Solenoid, Lock-Up Solenoid Inspection .
  3. Disconnect the transmission control module (TCM) connector and measure the resistance between the terminal A5 and A23.
Is the measurement within the specified values?		 20°C (68°F)
11-16 Ω		 Go to Step 5  Go to Step 6 
4 Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .
Did you complete the repair?		 - System OK -
5
  1. Estimate the failure of between the vehicle wiring harness connector and TCM.
  2. Inspect the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .
  3. Inspect the connection condition between the connectors.
Is the connection condition OK?		 - Go to Step 7  Go to Step 4 
6
  1. Estimate the failure of between the vehicle harness and lockup solenoid.
  2. Disconnect the transaxle harness connector and measure the resistance between lock-up solenoid connector terminal 4 and ground.
Is the measurement within the specified values?		 20°C (68°F)
11-16 Ω		 Go to Step 8  Go to Step 9 
7
  1. Replace the TCM.
  2. Perform the reproducing test under user condition after confirming no DTC.
Is DTC displayed?		 - Go to Step 1  System OK
8
  1. Estimate the failure of the vehicle wiring harness or between connectors.
  2. Test continuity and short circuit for the vehicle wiring harness and inspect the connection condition between connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .
Is the condition OK?		 - Go to Step 4  Go to Step 11 
9
  1. Estimate the failure of the transaxle harness or between connectors of lockup solenoid.
  2. Inspect the lockup solenoid. Refer to Shift Solenoid (1, 2), Timing Solenoid, Lock-Up Solenoid Inspection .
Is the problem found?		 - Go to Step 12  Go to Step 10 
10
  1. Estimate the failure of the transaxle harness.
  2. Test continuity and short circuit for the transaxle harness and inspect the connection condition between connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .
Is the condition OK?		 - Go to Step 4  Go to Step 11 
11 Replace the transaxle harness.
Did you complete the replacement?		 - System OK -
12 Replace the lock-up solenoid. Refer to Shift Solenoid (1, 2), Timing Solenoid, Lock-Up Solenoid Inspection .
Did you complete the replacement?		 - System OK -
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