For 1990-2009 cars

#### TFP Manual Valve Position Switch Resistance Check

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Install a J 39775 Jumper Harness on the transmission 20-way connector, if needed.
2. Using a J 39200 Digital Multimeter (DMM) and a J 35616-A Connector Test Adapter Kit, measure the resistance between terminals U and N.

Is the resistance more than the value shown?

50 K ohms

Go to Step 3

Go to Step 2

2 |

1. Disconnect the Automatic Transmission (A/T) Wiring Harness from the TFP Manual Val. Position Sw.
2. Measure the resistance between terminals B and E of the TFP Manual Val. Position Sw.

Is the resistance more than the value shown?

50 K ohms

Go to Step 19

Go to Step 21

3 | Measure the resistance between terminals U and R of the transmission 20-way connector. Is the resistance less than the value shown? | 50 ohms | Go to Step 5 | Go to Step 4
4 |

1. Disconnect the Automatic Transmission (A/T) Wiring Harness from the TFP Manual Val. Position Sw.
2. Measure the resistance between terminals B and D of the TFP Manual Val. Position Sw.

Is the resistance less than the value shown?

50 ohms

Go to Step 19

Go to Step 21

5 | Measure the resistance between terminals U and P of the transmission 20-way connector. Is the resistance more than the value shown? | 50 K ohms | Go to Step 7 | Go to Step 6
6 |

1. Disconnect the Automatic Transmission (A/T) Wiring Harness from the TFP Manual Val. Position Sw.
2. Measure the resistance between terminals B and C of the TFP Manual Val. Position Sw.

Is the resistance more than the value shown?

50 K ohms

Go to Step 19

Go to Step 21

7 | Measure the resistance between terminals P and R of the transmission 20-way connector. Is the resistance more than the value shown? | 50 K ohms | Go to Step 9 | Go to Step 8
8 |

1. Disconnect the Automatic Transmission (A/T) Wiring Harness from the TFP Manual Val. Position Sw.
2. Measure the resistance between terminals C and D of the TFP Manual Val. Position Sw.

Is the resistance more than the value shown?

50 K ohms

Go to Step 19

Go to Step 21

9 | Measure the resistance between terminals N and P of the transmission 20-way connector. Is the resistance more than the value shown? | 50 K ohms | Go to Step 11 | Go to Step 10
10 |

1. Disconnect the Automatic Transmission (A/T) Wiring Harness from the TFP Manual Val. Position Sw.
2. Measure the resistance between terminals C and E of the TFP Manual Val. Position Sw.

Is the resistance more than the value shown?

50 K ohms

Go to Step 19

Go to Step 21

11 | Measure the resistance between terminals N and R of the transmission 20-way connector. Is the resistance more than the value shown? | 50 K ohms | Go to Step 13 | Go to Step 12
12 |

1. Disconnect the Automatic Transmission (A/T) Wiring Harness from the TFP Manual Val. Position Sw.
2. Measure the resistance between terminals D and E of the TFP Manual Val. Position Sw.

Is the resistance more than the value shown?

50 K ohms

Go to Step 19

Go to Step 21

13 | Measure the resistance between terminal B and the TFP Manual Val. Position Sw. housing. Is the resistance less than the value shown? | 50 ohms | Go to Step 14 | Go to Step 21
14 | Measure the resistance between terminal C and the TFP Manual Val. Position Sw. housing. Is the resistance more than the value shown? | 50 K ohms | Go to Step 15 | Go to Step 21
15 | Measure the resistance between terminal D and the TFP Manual Val. Position Sw. housing. Is the resistance less than the value shown? | 50 ohms | Go to Step 16 | Go to Step 21
16 | Measure the resistance between terminal E and the TFP Manual Val. Position Sw. housing. Is the resistance more than the value shown? | 50 K ohms | Go to Step 17 | Go to Step 21
17 | Measure the resistance of the Automatic Transmission (A/T) Wiring Harness from pins N and P of the transmission 20-way connector to the transmission case. Is the resistance more than the value shown? | 50 K ohms | Go to Step 18 | Go to Step 20
18 | Measure the resistance of the Automatic Transmission (A/T) Wiring Harness from pins R and U of the transmission 20-way connector to the transmission case. Is the resistance less than the value shown? | 50 ohms | System OK | Go to Step 20
19 | Inspect for high resistance:

• | Inspect the Automatic Transmission (A/T) Wiring Harness for poor electrical connections at the transmission 20-way connector and at the TFP Manual Val. Position Sw. connector.

• | Look for possible bent, backed out, deformed, or damaged terminals.

• | Check for weak terminal tension.

Was the condition found and corrected?

--

Go to Step 1

Go to Step 20

20 | Replace the Automatic Transmission (A/T) Wiring Harness. Is the replacement complete? | -- | Go to Step 1 | --
21 | Replace the TFP Manual Val. Position Sw. Is the replacement complete? | -- | Go to Step 1 | --