Transmission Fluid Pressure Manual Valve Position Switch Resistance Check. Cadillac Concours 1997

For 1990-2009 cars

#### Automatic Transmission Fluid Pressure Manual Valve Position Switch Resistance Check

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---

1

1. Connect the J 39775 Jumper Harness to the transmission side of the 20-way connector.
2. Using the J 39200 Digital Multimeter (DMM) and J 35616 Connector Test Adapter Kit, measure the resistance from terminal N to ground.

Is the resistance less than the specified value?

1000 ohms

Go to Step 2

Go to Step 3

2 | Inspect the PNK wire CKT 1224 of the transmission harness for a short to ground. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Was the condition found? | -- | Go to Step 14 | Go to Step 13
3 | Measure the resistance from terminal R to ground. Is the resistance less than the specified value? | 1000 ohms | Go to Step 4 | Go to Step 5
4 | Inspect the DK BLU wire CKT 1225 of the automatic transmission wiring harness for a short to ground. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Was the condition found? | -- | Go to Step 14 | Go to Step 13
5 | Measure the resistance from terminal P to ground. Is the resistance less than the specified value? | 1000 ohms | Go to Step 6 | Go to Step 7
6 | Inspect the ORN wire CKT 1226 of the automatic transmission wiring harness for a short to ground. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Was the condition found? | -- | Go to Step 14 | Go to Step 13

7

1. Run the engine at idle.
2. Place the gear select lever in the reverse position.
3. Measure the resistance from terminal N to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 9

Go to Step 8

8 | Inspect and repair the PNK wire CKT 1224 of the automatic transmission wiring harness for an open. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Was the condition found? | -- | Go to Step 14 | Go to Step 13
9 | Measure the resistance from terminal R to ground. Is the resistance less than the specified value? | 5 ohms | Go to Step 11 | Go to Step 10
10 | Inspect the DK BLU wire CKT 1225 of the automatic transmission wiring harness for an open. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Was the condition found? | -- | Go to Step 14 | Go to Step 13

11

1. Place the gear select lever in the D4 position.
2. Measure the resistance from terminal P to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 13

Go to Step 12

12 | Inspect the ORN wire CKT 1226 of the automatic transmission wiring harness for an open. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Was the condition found? | -- | Go to Step 14 | Go to Step 13
13 | If no open or shorts to ground were found, replace the Automatic Transmission Fluid Pressure Manual Valve Position Switch. Refer to TFP Manual Valve Position Switch Replacement. Is the replacement complete? | -- | Go to Step 15 | --
14 | Replace the automatic transmission wiring harness. Refer to Automatic Transmission Wiring Harness Replacement. Is the replacement complete? | -- | Go to Step 15 | --

15

In order to verify your repair, perform the following procedure:

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

3.1. | Move the gear select through all of the ranges.

3.2. | Ensure that the vehicle achieves an upshift.

4. Select Specific DTC. Enter DTC P1810.

Has the test run and passed?

--

System OK

Go to DTC P1810 TFP Valve Position Switch Circuit