• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
TR Signal A | P0705 | P0705 | -- | -- |
TR Signal B | P0705 | P0705 | -- | -- |
TR Signal C | P0705 | P0705 | -- | -- |
TR Signal P | P0705 | P0705 | -- | -- |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running in Park, normal operating temperature Parameter Normal Range: HI when switch open, LOW when switch grounded. | |||
TR Sw. A/B/C/P | LOW | HI | -- |
The transmission range (TR) switch is part of the Park/Neutral Position (PNP) switch and is mounted on the transmission manual shaft. The TR switch is a multi-signal switch. The transmission control module (TCM) supplies ignition voltage to the TR switch on 4 signal circuits, A, B, C, and P. Each gear selector lever position grounds one or more of the signal circuits in a unique pattern. In order to determine the gear range selected by the driver, the TCM compares the voltage combination on the signal circuits to a TR switch combination table stored in memory. Refer to Transmission Range Switch Logic.
The engine is running for 5 seconds.
The combination of TR switch signals is invalid for 60 seconds. Refer to Transmission Range Switch Logic.
• | DTC P0705 is a type B DTC. |
• | The TCM commands an alternate coast shift pattern where downshifts occur at higher vehicle speeds while coasting. |
DTC P0705 is a type B DTC.
Automatic Transmission Controls Schematics
Electronic Component Description for park/neutral position switch information
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
J 44152 Jumper Harness (20 pins)
⇒ | If not the specified value, test each signal circuit for a short to ground. If all circuits test normal, replace the TCM. |
⇒ | If greater than the specified value, check the ground circuit for an open/high resistance. |
Using a DMM, connect one lead to the PNP Switch ground circuit terminal 11, and the other lead to each of the following PNP Switch signal circuit terminals and compare the readings to the Transmission Range Switch Logictable for each gear selector position.
• | Terminal 9 |
• | Terminal 8 |
• | Terminal 10 |
• | Terminal 2 |
Important: A DMM reading of less than 10 ohms corresponds to LOW on the logic Table. A DMM reading of infinite resistance corresponds to HIGH on the logic Table.
⇒ | If not the specified value, replace the PNP Switch. |
Perform the Diagnostic Repair Verification after completing the repair.
• | Control Module References for TCM replacement, setup, and programming. |