For 1990-2009 cars

## DTC P0753 1-2 Shift Solenoid Circuit Electrical 2.4L

Automatic Transmission Components
Automatic Transmission Controls Schematics
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice

### Circuit Description

The 1-2 shift solenoid valve (1-2 SS valve) controls fluid flow acting on the 1-2 shift valve. The solenoid is a normally-open valve that, in conjunction with the 2-3 shift solenoid valve (2-3 SS valve), allows four different shifting combinations (Refer to the Shift Solenoid Valve State and Gear Ratio table). The 1-2 SS valve is attached to the valve body, within the transmission.

The solenoid receives ignition voltage through the fused circuit. The PCM commands the solenoid ON or OFF by providing a ground path through circuit 1222.

When the PCM detects a continuous open, short to ground, or short to power in the 1-2 SS valve circuit, then DTC P0753 sets. DTC P0753 is a type A DTC.

### Conditions for Running the DTC

• | The ignition switch is in the RUN position.

• | The system voltage is 8-18 volts.

### Conditions for Setting the DTC

One of the following conditions occurs for 4.3 seconds:

• | The PCM commands the solenoid ON, and the voltage remains high (B+).

• | The PCM commands the solenoid OFF, and the voltage remains low (0 volts).

### Action Taken When the DTC Sets

• | The PCM illuminates the malfunction indicator lamp (MIL).

• | The PCM commands maximum line pressure.

• | The PCM inhibits TCC engagement.

• | The PCM freezes shift adapts from being updated.

• | The PCM stores DTC P0753 in PCM history.

### Conditions for Clearing the MIL/DTC

• | The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.

• | A scan tool clears the DTC from PCM history.

• | The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.

• | The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM.

### Diagnostic Aids

• | An open in circuit 1039 will cause multiple DTCs to set.

• | Inspect the wiring at the PCM, the transmission 20-way connector, the 1-2 SS valve 2-way connector, and all other circuit connecting points for the following conditions:

- | A backed out terminal

- | A damaged terminal

- | Reduced terminal tension

- | A chafed wire

- | A broken wire inside the insulation

- | Moisture intrusion

- | Corrosion

• | When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change. Refer to Shift Solenoid Valve State and Gear Ratio .

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. DTCs P0758 and P1860 will also set if the power circuit is open.

2. This step tests the electrical operation of the solenoid.

3. This step tests the PCM and the wiring to the transmission.

4. This step tests circuit 1222 for a short to battery power.

5. This step verifies that the circuit has the correct resistance.

#### DTC P0753 1-2 Shift Solenoid Circuit -- Electrical (2.4L)

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to Step 2 | Go to Powertrain On Board Diagnostic (OBD) System Check
2 |

1. Install the Scan Tool .
2. Turn the ignition switch to the RUN position.

Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the PCM.

3. Record the Freeze Frame and Failure Records.
4. Clear the DTCs.

Are DTCs P0758 and P1860 also set?

--

Go to Step 3

Go to Step 8

3 |

1. Remove the AUTO TRANS fuse.
2. Inspect the fuse for an open.

Was the condition found?

--

Go to Step 4

Go to Step 6

4 | Important: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics in Wiring Systems, for complete circuit distribution. Inspect circuit 1039 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems.

Was the condition found?

--

Go to Step 22

Go to Step 5

5 | Important: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics in Wiring Systems, for complete circuit distribution. Inspect circuit 839 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems.

Was the condition found?

--

Go to Step 23

--

6 | Inspect circuit 1039 for an open. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | Go to Step 7
7 | Inspect circuit 839 for an open. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 23 | --
8 |

1. Use the scan tool in order to command the 1-2 SS valve ON and OFF 3 times.
2. Listen at the transmission side cover.

Does the solenoid click when commanded ON and OFF?

--

Go to Diagnostic Aids

Go to Step 9

9 |

1. Turn the ignition switch OFF.
2. Disconnect the transmission 20-way connector (additional DTCs will set).
3. Install the J 39775 jumper harness to the engine side of the 20-way connector.
4. Using the J 35616-A connector test adapter kit, connect a test lamp from terminal E to terminal A.
5. Turn the ignition switch to the RUN position.
6. Command the 1-2 SS valve ON and OFF three times.

Is the test lamp ON when you command the solenoid ON, and OFF when you command the solenoid OFF?

--

Go to Step 17

Go to Step 10

10 | Is the test lamp always ON? | -- | Go to Step 11 | Go to Step 13
11 |

1. Turn the ignition switch OFF.
2. Disconnect the C2 PCM connector (additional DTCs will set).
3. Turn the ignition switch to the RUN position.

Is the test lamp ON?

--

Go to Step 12

Go to Step 25

12 | Inspect circuit 1222 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | --
13 | Is the test lamp always OFF? | -- | Go to Step 14 | --
14 | Inspect circuit 1222 for an open. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | Go to Step 15
15 | Connect a test lamp from terminal A to a good ground. Is the test lamp ON? | -- | Go to Step 16 | Go to Step 25
16 | Inspect circuit 1222 for a short to battery power. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | --
17 |

1. Turn the ignition switch OFF.
2. Disconnect the J 39775 from the engine side of the 20-way connector.
3. Connect the J 39775 to the transmission side of the 20-way connector.
4. Using the J 35616-A , connect the J 39200 DMM from terminal E to terminal A and measure the resistance.

Is the resistance within the specified range?

19-31 ohms

Go to Step 20

Go to Step 18

18 | Is the resistance greater than the specified value? | 250 ohms | Go to Step 19 | Go to Step 20
19 |

1. Inspect circuit 1222 for an open.
2. Inspect circuit 1222 for a poor connection at the connector.
3. Inspect circuit 839 for an open.
4. Inspect circuit 839 for a poor connection at the connector.

Refer to General Electrical Diagnosis in Wiring Systems.

Was a condition found?

--

Go to Step 23

Go to Step 24

20 | Measure the resistance from terminal A to a good ground. Is the resistance less than the specified value? | 1,000 ohms | Go to Step 21 | Go to Step 24
21 | Inspect circuit 1222 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 23 | --
22 | Repair the wiring as necessary. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 26 | --
23 | Replace the automatic transmission wiring harness. Refer to Unit Repair. Is the replacement complete? | -- | Go to Step 26 | --
24 | Replace the 1-2 SS valve. Refer to Control and Shift Solenoids Replacement. Is the replacement complete? | -- | Go to Step 26 | --
25 | Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls. Is the replacement complete? | -- | Go to Step 26 | --
26 | Perform the following procedure in order to verify the repair:

1. Select DTC.
2. Select Clear Info.
3. Operate the vehicle under the following conditions:

• | Drive the vehicle in D4.

• | Allow the transmission to shift through all the gears.

4. Select Specific DTC.
5. Enter DTC P0753.

Has the test run and passed?

--

System OK

Go to Step 1

## DTC P0753 1-2 Shift Solenoid Circuit Electrical 3.1L

Automatic Transmission Components
Automatic Transmission Controls Schematics
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice

### Circuit Description

The 1-2 shift solenoid valve (1-2 SS valve) controls fluid flow acting on the 1-2 shift valve. The solenoid is a normally-open valve that, in conjunction with the 2-3 shift solenoid valve (2-3 SS valve), allows four different shifting combinations (Refer to the Shift Solenoid Valve State and Gear Ratio table). The 1-2 SS valve is attached to the valve body, within the transmission.

The solenoid receives ignition voltage through the fused circuit. The PCM commands the solenoid ON or OFF by providing a ground path through circuit 1222.

When the PCM detects a continuous open, short to ground, or short to power in the 1-2 SS valve circuit, then DTC P0753 sets. DTC P0753 is a type A DTC.

### Conditions for Running the DTC

• | The ignition switch is in the RUN position.

• | The system voltage is 8-18 volts.

### Conditions for Setting the DTC

One of the following conditions occurs for 4.3 seconds:

• | The PCM commands the solenoid ON, and the voltage remains high (B+).

• | The PCM commands the solenoid OFF, and the voltage remains low (0 volts).

### Action Taken When the DTC Sets

• | The PCM illuminates the malfunction indicator lamp (MIL).

• | The PCM commands maximum line pressure.

• | The PCM inhibits TCC engagement.

• | The PCM freezes shift adapts from being updated.

• | The PCM stores DTC P0753 in PCM history.

### Conditions for Clearing the MIL/DTC

• | The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.

• | A scan tool clears the DTC from PCM history.

• | The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.

• | The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM.

### Diagnostic Aids

• | An open in circuit 1039 will cause multiple DTCs to set.

• | Inspect the wiring at the PCM, the transmission 20-way connector, the 1-2 SS valve 2-way connector, and all other circuit connecting points for the following conditions:

- | A backed out terminal

- | A damaged terminal

- | Reduced terminal tension

- | A chafed wire

- | A broken wire inside the insulation

- | Moisture intrusion

- | Corrosion

• | When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change. Refer to Shift Solenoid Valve State and Gear Ratio .

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. DTCs P0758 and P1860 will also set if the power circuit is open.

2. This step tests the electrical operation of the solenoid.

3. This step tests the PCM and the wiring to the transmission.

4. This step tests circuit 1222 for a short to battery power.

5. This step verifies that the circuit has the correct resistance.

#### DTC P0753 1-2 Shift Solenoid Circuit -- Electrical (3.1L)

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to Step 2 | Go to Powertrain On Board Diagnostic (OBD) System Check
2 |

1. Install the Scan Tool .
2. Turn the ignition switch to the RUN position.

Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the PCM.

3. Record the Freeze Frame and Failure Records.
4. Clear the DTCs.

Are DTCs P0758 and P1860 also set?

--

Go to Step 3

Go to Step 8

3 |

1. Remove the AUTO TRANS fuse.
2. Inspect the fuse for an open.

Was the condition found?

--

Go to Step 4

Go to Step 6

4 | Important: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics in Wiring Systems, for complete circuit distribution. Inspect circuit 1039 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems.

Was the condition found?

--

Go to Step 22

Go to Step 5

5 | Important: The condition that affects this circuit may exist in other connecting branches of the circuit. Refer to Power Distribution Schematics in Wiring Systems, for complete circuit distribution. Inspect circuit 839 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems.

Was the condition found?

--

Go to Step 23

--

6 | Inspect circuit 1039 for an open. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | Go to Step 7
7 | Inspect circuit 839 for an open. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 23 | --
8 |

1. Use the scan tool in order to command the 1-2 SS valve ON and OFF 3 times.
2. Listen at the transmission side cover.

Does the solenoid click when commanded ON and OFF?

--

Go to Diagnostic Aids

Go to Step 9

9 |

1. Turn the ignition switch OFF.
2. Disconnect the transmission 20-way connector (additional DTCs will set).
3. Install the J 39775 jumper harness to the engine side of the 20-way connector.
4. Using the J 35616-A connector test adapter kit, connect a test lamp from terminal E to terminal A.
5. Turn the ignition switch to the RUN position.
6. Command the 1-2 SS valve ON and OFF three times.

Is the test lamp ON when you command the solenoid ON, and OFF when you command the solenoid OFF?

--

Go to Step 17

Go to Step 10

10 | Is the test lamp always ON? | -- | Go to Step 11 | Go to Step 13
11 |

1. Turn the ignition switch OFF.
2. Disconnect the C2 PCM connector (additional DTCs will set).
3. Turn the ignition switch to the RUN position.

Is the test lamp ON?

--

Go to Step 12

Go to Step 25

12 | Inspect circuit 1222 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | --
13 | Is the test lamp always OFF? | -- | Go to Step 14 | --
14 | Inspect circuit 1222 for an open. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | Go to Step 15
15 | Connect a test lamp from terminal A to a good ground. Is the test lamp ON? | -- | Go to Step 16 | Go to Step 25
16 | Inspect circuit 1222 for a short to battery power. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 22 | --
17 |

1. Turn the ignition switch OFF.
2. Disconnect the J 39775 from the engine side of the 20-way connector.
3. Connect the J 39775 to the transmission side of the 20-way connector.
4. Using the J 35616-A , connect the J 39200 digital multimeter (DMM) from terminal E to terminal A and measure the resistance.

Is the resistance within the specified range?

19-31 ohms

Go to Step 20

Go to Step 18

18 | Is the resistance greater than the specified value? | 250 ohms | Go to Step 19 | Go to Step 20
19 |

1. Inspect circuit 1222 for an open.
2. Inspect circuit 1222 for a poor connection at the connector.
3. Inspect circuit 839 for an open.
4. Inspect circuit 839 for a poor connection at the connector.

Refer to General Electrical Diagnosis in Wiring Systems.

Was a condition found?

--

Go to Step 23

Go to Step 24

20 | Measure the resistance from terminal A to a good ground. Is the resistance less than the specified value? | 1,000 ohms | Go to Step 21 | Go to Step 24
21 | Inspect circuit 1222 for a short to ground. Refer to General Electrical Diagnosis in Wiring Systems. Was the condition found? | -- | Go to Step 23 | --
22 | Repair the wiring as necessary. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 26 | --
23 | Replace the automatic transmission wiring harness. Refer to Unit Repair. Is the replacement complete? | -- | Go to Step 26 | --
24 | Replace the 1-2 SS valve. Refer to Control and Shift Solenoids Replacement. Is the replacement complete? | -- | Go to Step 26 | --
25 | Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls. Is the replacement complete? | -- | Go to Step 26 | --
26 | Perform the following procedure in order to verify the repair:

1. Select DTC.
2. Select Clear Info.
3. Operate the vehicle under the following conditions:

• | Drive the vehicle in D4.

• | Allow the transmission to shift through all the gears.

4. Select Specific DTC.
5. Enter DTC P0753.

Has the test run and passed?

--

System OK

Go to Step 1