| • | The system voltage is too low. | 
| • | The transmission control module (TCM) detects that voltage is less than 9 volts for 0.5 seconds continuously. | 
| • | The engine revolution is 600 RPM or greater. | 
The TCM will request the illumination of the hold lamp and store the DTC when the TCM detects failures on 2 consecutive ignition cycles.
| • | The TCM turns off the hold lamp when no further failure is detected on the next ignition cycles. | 
| • | The scan tool can clear the DTC from the TCM history. | 
| • | The TCM clears the DTC from the TCM history memory after 40 consecutive ignition cycles without fault. | 
| • | TCM wiring harness and connectors | 
| • | Battery | 
| • | TCM | 
Step  | Action  | Values  | Yes  | No  | 
|---|---|---|---|---|
1  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 4  | Go to Step 2  | 
2  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 4  | Go to Step 3  | 
3  | Replace the battery. Did you complete the replacement?  | --  | System OK  | --  | 
4  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 6  | Go to Step 5  | 
5  | 
 Did you complete the action?  | --  | System OK  | --  | 
6  | Test the EF1, F2 fuse for an open. Was a problem found?  | --  | Go to Step 7  | Go to Step 8  | 
7  | 
 Did you complete the replacement?  | --  | System OK  | --  | 
8  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 10  | Go to Step 9  | 
9  | Repair the fuse voltage supply lines for open. Did you complete the repair?  | --  | System OK  | --  | 
10  | 
 Is the resistance equal to the specified value?  | 0 ohms  | Go to Step 12  | Go to Step 11  | 
11  | Repair the circuit between EF1 and terminal A24 for short to ground and open. Did you complete the repair?  | --  | System OK  | --  | 
12  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 13  | Go to Step 14  | 
13  | Repair the circuit from EF1 to terminal A24 of the TCM for short to battery. Did you complete the repair?  | --  | System OK  | --  | 
14  | 
 Is the resistance equal to the specified value?  | 0 ohms  | Go to Step 16  | Go to Step 15  | 
15  | Repair the circuit between F2 and terminal A6 for short to ground and open. Did you complete the repair?  | --  | System OK  | --  | 
16  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 17  | Go to Step 18  | 
17  | Repair the circuit between F2 and terminal A6 for short to battery. Did you complete the repair?  | --  | System OK  | --  | 
18  | 
 Was a condition found?  | --  | Go to Step 20  | Go to Step 19  | 
19  | Replace the TCM. Refer to Transmission Control Module Replacement Did you complete the replacement?  | --  | Go to Step 20  | --  | 
20  | 
 Has the last test failed or is the current DTC displayed?  | --  | Go to Step 1  | System OK  | 
| • | The system voltage is too low. | 
| • | The transmission control module (TCM) detects that voltage is less than 9 volts for 0.5 seconds continuously. | 
| • | The engine revolution is 600 RPM or greater. | 
The TCM will request the illumination of the MIL lamp and store the DTC when the TCM detects failures on 2 consecutive ignition cycles.
| • | The TCM turns off the MIL lamp when no further failure is detected on the next ignition cycles. | 
| • | The scan tool can clear the DTC from the TCM history. | 
| • | The TCM clears the DTC from the TCM history memory after 40 consecutive ignition cycles without fault. | 
| • | TCM wiring harness and connectors | 
| • | Battery | 
| • | TCM | 
Step  | Action  | Values  | Yes  | No  | 
|---|---|---|---|---|
1  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 4  | Go to Step 2  | 
2  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 4  | Go to Step 3  | 
3  | Replace the battery. Did you complete the replacement?  | --  | System OK  | --  | 
4  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 6  | Go to Step 5  | 
5  | 
 Did you complete the action?  | --  | System OK  | --  | 
6  | Test the EF1, F2 fuse for an open. Was a problem found?  | --  | Go to Step 7  | Go to Step 8  | 
7  | 
 Did you complete the replacement?  | --  | System OK  | --  | 
8  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 10  | Go to Step 9  | 
9  | Repair the fuse voltage supply lines for open. Did you complete the repair?  | --  | System OK  | --  | 
10  | 
 Is the resistance equal to the specified value?  | 0 ohms  | Go to Step 12  | Go to Step 11  | 
11  | Repair the circuit between EF1 and terminal A24 for short to ground and open. Did you complete the repair?  | --  | System OK  | --  | 
12  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 13  | Go to Step 14  | 
13  | Repair the circuit from EF1 to terminal A24 of the TCM for short to battery. Did you complete the repair?  | --  | System OK  | --  | 
14  | 
 Is the resistance equal to the specified value?  | 0 ohms  | Go to Step 16  | Go to Step 15  | 
15  | Repair the circuit between F2 and terminal A6 for short to ground and open. Did you complete the repair?  | --  | System OK  | --  | 
16  | 
 Is the voltage within the specified range?  | 9-16 V  | Go to Step 17  | Go to Step 18  | 
17  | Repair the circuit between F2 and terminal A6 for short to battery. Did you complete the repair?  | --  | System OK  | --  | 
18  | 
 Was a condition found?  | --  | Go to Step 20  | Go to Step 19  | 
19  | Replace the TCM. Refer to Transmission Control Module Replacement Did you complete the replacement?  | --  | Go to Step 20  | --  | 
20  | 
 Has the last test failed or is the current DTC displayed?  | --  | Go to Step 1  | System OK  |