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The Drive-to-fourth switch:
Detects when the gear selector lever is moved from Drive to Fourth. Is hard-wired to the transmission control module.
The Neutral position switch:
Is hard-wired to the body processor module. Detects when the gear selector lever is moved to the Neutral position.
The Park position switch:
Is hard-wired to the body processor module. Detects when the gear selector leve r is moved to the Park position.
The gear selector module:
Provides illumination of the gear sele ctor surround, which is dimmable via a CA N signal from the instrument cluster. Provides red illumination, on the gear selector surround, of the gear selected, by CAN signals from the instrument
cluster.
Illuminates the security system Active LED on the gear se lector surround, in response to an input from the body
processor module.
Is connected to the fascia harness via a 12-way connector. Refer to Connec tor Pins Identification, 307-01A.
The gear selector interlock solenoid:
Prevents the gear selector lever from be ing moved from the Park position, unless th e ignition switch is in position II,
and the brake pedal is depressed.
Is controlled by an input from the body processor module.
The seven gear selector positions are:
P : The transmission is mechanically locked (starting available). R : Reverse gear. N : No power to the rear wh eels (starting available). D : All 5 forward gears available. 4 : Upshift to 4th gear only. 3 : Upshift to 3rd gear only. 2 : Upshift to 2nd gear only.
Performance Mode Pushbutton
The performance mode pushbutton:
Is mounted on the gear selector surround. Selects Normal or Sport mode when pressed by the driver. Is illuminated when Sport mode is selected.
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Is hard-wired to the transmission control module.
Kickdown Switch (where fitted)
The kickdown switch:
Is floor mounted under the accelerator pedal. Is operated by pressing the pedal to the full throttle position. Provides maximum acceleration on driver demand, by signal ling the transmission control module to select the lowest gear to give maximum wheel torque.
Transmission Unit Gear Selector
The gear selector at the transmission unit:
Is connected to the driver's selector module by a Bowden cable. Operates the manual selector valve, which is part of the electro-hydraulic control unit. Operates the rotary switch, which is connected to the transmission control module.
Transmission Switches
Location, Rotary Switch
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Location, Drive to 4th Switch
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Operation
• NOTE: The rotary position switch is NOT adjustable.
The position of the gear selector lever is detected by the range sensor; a system which consists of two sensors (switch
systems). 1. 1. The rotary position switch, which is located on the RH side of the transmission case and is coaxial with the
selector shaft.
2. 2. The D to 4 (micro) switch, which is mounted in the 'J gate' assembly.
When the selector is moved across the ga te to engage 4, or back from that side towards D the selector cable does not
move. In order that this change of state be registered by the TCM the D to 4 switch is incorporated.
The rotary switch in isolation provides a 4-bit code, which, when added to the D to 4 switch becomes a 5-bit code. The TCM
will make a failure judgement if it detects an 'illegal' code.
Circuit Diagram, Rotary and Drive to 4th Switches / TCM
ItemDescription
1Drive to 4th switch
2Switch L1
3Switch L2
4Switch L3
5Switch L4
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Automatic Transmission/Transaxle External Controls - 4.0L NA V8 -
AJ27/3.2L NA V8 - AJ26 - External Controls
Diagnosis and Testing
Symptom Chart
Symptom Chart
Pinpoint test A: P0706
Special Tool(s)
Digital multimeter
Generic scantool
SymptomPossible SourcesAction
DTC P0706 Transmission range sensor circuit range /
performanceSelector cable maladjusted
Rotary switch fault
D to 4 switch fault
Rotary position switch fault
Harness fault
Connector pins(s) bent, loose or
corroded
*
*
*
*
*
*GO to Pinpoint Test A
*
PINPOINT TEST A : P0706
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
A1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.
Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to A2
A2: STATUS / RELATIONSHIP CHECK
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Move the selector lever slowly from P to 2 and back,
noting the illumination / positi on relationship as follows: 1
Does state illumination match the lever position in each
direction of travel?
Yes
GO to A4
No GO to A3
No With lever at D (when moving from 2 to P ) is 3 or 4
illuminated?
Yes GO to A3
No GO to A5
No With lever moved from P , to position 4 , is D illuminated?
Yes GO to A4
No GO to A5
A3: CHECK SELECTOR CABLE ADJUSTMENT
Verify and correct as requ ired the selector cable
adjustment 1
OK?
Yes GO to A4
No Correct adjustment error, see 44.15.07 Workshop Manual
307-05A and test the system for normal operation.
A4: CHECK HARNESS SIGNAL CONTINUITY - D TO 4 SWITCH
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With EM007 and CC007 disconnected, measure the
resistance between CC007/003 and EM007/028
Repeat for
1
CC007/001 and EM007/013 2
Is the resistance < 0.5 OHM?
Yes GO to A5
No Inspect EM007 and CC007 EM053 for corrosion, bent /
pushed back pins or locate harness / splice EMS25 and
CCS20. Repair as necessary and test the system for
normal operation.
A5: CHECK D TO 4 SWITCH
• NOTE: Engage position 2 firmly
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With CC007 disconnected, measure the resistance
between switch pins 001 and 003 1
With the selector leve r at 4, 3, 2 is the resistance < 0.5 OHM?
With the selector leve r at P, R, N, D is the resistance < >50
KOHM?
Yes GO to A6
No Renew D to 4 switch and te st the system for normal
operation.
A6: CHECK HARNESS DIGITAL GROUND CONTINUITY