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Home >> Suzuki >> 2007 >> Swift + >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - AISIN 81-40LE - DTC P0977 To DTC U2105 >> DTC P0977 >> Cause of Failure
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Cause of Failure

DTC P0977

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Automatic Transmission? - Go to Step 2  Go to Diagnostic System Check - Automatic Transmission
2
  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 DTC Information menu.
  5. Store Freeze Frame/Failure Records.
  6. Select Clear DTC Information from the DTC Information menu.
  7. Clear the DTC information.
  8. Perform 1 vehicle drive cycle.
Is the malfunction indicator lamp (MIL) ON?
- Go to Step 3  Go to Step 5 
3
  1. Select Request DTC by Status from the DTC Information menu.
  2. Request DTC by Status.
Is DTC P0977 displayed?
- Go to Step 4  Go to Step 5 
4
  1. Turn OFF the ignition.
  2. Measure the resistance between the vehicle harness and SS2.
  3. Disconnect the transmission control module (TCM) connector (X-1) and measure the resistance between terminal A15 and A23.
Is the measurement within the specified values?
20°C (68°F)
11-16Ω
Go to Step 6  Go to Step 7 
5 Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .
Did you complete the repair?
- System OK -
6
  1. Estimate the failure between the vehicle wiring harness connector and the 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 8  Go to Step 5 
7
  1. Estimate the failure between the vehicle harness and the SS2.
  2. Disconnect the transaxle harness connector (X-3) of the T/M wiring harness and inspect the resistance between the SS2 connector terminal 10 and Ground.
Is the measurement within the specified values?
20°C (68°F)
11-16 Ω
Go to Step 9  Go to Step 10 
8
  1. Replace the TCM. Refer to Transmission Control Module Replacement .
  2. Perform the reproducing test under user condition after confirming no DTC.
Is a DTC displayed?
- Go to Step 2  System OK
9
  1. Estimate the failure of the vehicle wiring harness or between the connectors.
  2. Test for continuity and/or a short circuit for the vehicle wiring harness and inspect the connection condition between the transaxle harness connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .
Is the condition OK?
- System OK Go to Step 5 
10
  1. Estimate the failure of the transmission harness connector wire or between the connector and the solenoid.
  2. Inspect the solenoid for damage.
Is the condition found?
- Go to Step 12  Go to Step 11 
11
  1. Estimate the failure of the transmission harness connector.
  2. Test the continuity and short circuit for the transmission harness connector and inspect the connection condition between connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .
Is the condition OK?
- System OK Go to Step 5 
12 Replace the solenoid.
Did you complete the replacement?
- System OK -