For 1990-2009 cars

#### Internal Wiring Harness Check (1999 4T40-E/4T45-E)

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

1. Install the J 39775 jumper harness on the transmission side of the 20-way connector, if needed.
2. Using the J 39200 digital multimeter (DMM) and J 35616-A connector test adapter kit, measure the resistance between terminals A and E: the 1-2 shift solenoid valve.

Is the resistance within the values shown?

19-24 ohms @ 20°C (68°F)

24-31 ohms @ 100°C (212°F)

Go to Step 3

Go to Step 2

2 |

1. Disconnect the internal transmission harness from the 1-2 shift solenoid valve.
2. Measure the resistance of the 1-2 shift solenoid valve.

Is the resistance within the values shown?

19-24 ohms @ 20°C (68°F)

24-31 ohms @ 100°C (212°F)

Go to Step 14

Go to Step 16

3 | Measure the resistance between terminals B and E: the 2-3 shift solenoid valve. Is the resistance within the values shown? | 19-24 ohms @ 20°C (68°F) 24-31 ohms @ 100°C (212°F) | Go to Step 5 | Go to Step 4
4 |

1. Disconnect the internal transmission harness from the 2-3 shift solenoid valve.
2. Measure the resistance of the 2-3 shift solenoid valve.

Is the resistance within the values shown?

19-24 ohms @ 20°C (68°F)

24-31 ohms @ 100°C (212°F)

Go to Step 14

Go to Step 16

5 | Measure the resistance between terminals T and E: the TCC solenoid valve. Is the resistance within the values shown? | 10-11 ohms @ 20°C (68°F) 13-15 ohms @ 100°C (212°F) | Go to Step 7 | Go to Step 6
6 |

1. Disconnect the internal transmission harness from the TCC solenoid valve.
2. Measure the resistance of the TCC solenoid valve.

Is the resistance within the values shown?

10-11 ohms @ 20°C (68°F)

13-15 ohms @ 100°C (212°F)

Go to Step 14

Go to Step 16

7 | Measure the resistance between terminals C and D: the pressure control solenoid valve. Is the resistance within the values shown? | 3-5 ohms @ 20°C (68°F) 4-7 ohms @ 100°C (212°F) | Go to Step 9 | Go to Step 8
8 |

1. Disconnect the internal transmission harness from the pressure control solenoid valve.
2. Measure the resistance of the pressure control solenoid valve.

Is the resistance within the values shown?

3-5 ohms @ 20°C (68°F)

4-7 ohms @ 100°C (212°F)

Go to Step 14

Go to Step 16

9 | Measure the resistance between terminals S and V: the A/T ISS. Is the resistance within the values shown? | 625-725 ohms @ 20°C (68°F) 750-835 ohms @ 100°C (212°F) | Go to Step 11 | Go to Step 10
10 |

1. Disconnect the internal transmission harness from the A/T ISS.
2. Measure the resistance of the A/T ISS.

Is the resistance within the values shown?

625-725 ohms @ 20°C (68°F)

750-835 ohms @ 100°C (212°F)

Go to Step 14

Go to Step 16

11 | Measure the resistance between terminals M and L : the TFT sensor. Is the resistance within the values shown? | 3106-3923 ohms @ 20°C (68°F) 164-190 ohms @ 100°C (212°F) | Go to Step 13 | Go to Step 12
12 |

1. Disconnect the internal transmission harness from the TFP manual valve position switch.
2. Measure the resistance of the TFT sensor by placing the meter leads between terminals E and F of the TFP manual valve position switch.

Is the resistance within the values shown?

3106-3923 ohms @ 20°C (68°F)

164-190 ohms @ 100°C (212°F)

Go to Step 14

Go to Step 16

13 | Using the J 39200 (DMM) and J 35616-A , measure the resistance of the internal transmission harness from pins A, B, C, D, E, L, M, S, T and V of the transmission 20-way connector to the transmission case. Is the resistance greater than the value shown? | 250 K ohms | System OK | Go to Step 15
14 | Inspect for high resistance:

• | Inspect the transmission wiring for poor electrical connections at the transmission 20-way connector and at the component connectors.

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

• | Inspect for reduced terminal tension.

Was the condition found?

--

Go to Step 1

Go to Step 15

15 | Replace the internal wiring harness. Refer to Wire Harness Disconnect and Wiring Harness Removal in the 4T40-E/4T45-E Section of the Transmission Unit Repair Manual. Is the replacement complete? | -- | Go to Step 1 | --
16 | Replace the component. Refer to Repair Instructions in the 4T40-E/4T45-E Section of the Transmission Unit Repair Manual. Is the replacement complete? | -- | Go to Step 1 | --