General

Scope
The following information contains specified values and directions for measuring signals and levels on the transmission control module.

Points To Remember:
^ Measurements are to be carried out using a Breakout Box (BOB) connected between the control module and its connector.
^ A test reading of 12 V is to be regarded as a voltage level, not an absolute value.
For instance, in the case of solenoid 1-2/3-4 (S1) (pin1), solenoid 2-3 (S2) (pin 3) and solenoid lock-up (SIL) (pin 19), about 0.7-1.5 V is lost internally in the control module. Readings taken across these pins and ground (pin 35) will then show current battery voltage less 0.7-1.5 V, which is indicated in the table below.
^ A test reading of 0 V is to be regarded as a voltage level and not an absolute value.
Where the DRIVE signal (pin 11) is concerned, in the worst case about 0.5-1.5 V will be lost internally in the control module. A reading taken across the relevant control module pin and ground (pin 35) will then show less than 1.5 V, which is indicated in the table below.
^ Test readings should always be used with discrimination. All test readings are approximate.
^ Test readings %(+) and ms(+) indicate the signal's pulse ratio and pulse duration. A test instrument capable of measuring pulse ratio and pulse width must be used. The sign denotes a positive trigger pulse, TRIG+.
^ All test readings are in respect of a warmed-up engine/transmission.
^ The specified test readings refer to those obtained with a calibrated Fluke 88/97.
^ The articles referred to in the tables at "Signal, Function" contain a description of the relevant signal's function and a referral to a fault diagnosis schedule with detailed, step-by-step instructions explaining the diagnostic procedure to be followed.