SAAB WIS ONLINE

Test readings, TCM connections

Test readings, TCM connections





Scope

The following are values and directions for measuring signals and levels on automatic transmission control modules. Pin number not specified in the table are not used.

Points to remember


• Observe the test conditions, use your common sense when assessing the readings obtained.

• The specified values are with the ignition in position ON unless stated otherwise.

• First check that the control module is supplied with current and grounded.

• Then check all sensor inputs and signals from other systems.

• Finally, check the control module inputs. Remember that the test readings do not indicate whether or not the actuator is in working order.

• If any reading is not OK, consult the wiring diagram to determine the leads, connectors or components which ought to be checked more thoroughly.

• The specified test readings refer to those obtained with a calibrated Fluke 88/97.

• Test readings %(+) and ms(+) indicate the signal 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+.

Note

All units connected to the I and P-buses transmit signals.



Table connector A


Pin, connector A (control module) Component/ Function In/Out Test conditions Test between Test reading See
8 Manual up and down shifting in Ignition ON. 8-ground 0.9V
8 Manual up and down shifting in Ignition ON. Shift up 8-ground 1.4V
8 Manual up and down shifting in Ignition ON. Shift down 8-ground 2.7V
22 Battery voltage +15 In Ignition ON 22-ground 12V
23 Ground In 23-B+ 12V
24 No connection
25 Bus+ In/Out
26 Bus- in/out
31 Battery voltage +15 In Ignition ON 31-ground 12V
32 Ground In 32-B+ 12V
33 Battery voltage +30 In 33-ground 12V
35 Bus +lead 2 In/Out
36 Bus -lead 2 In/Out


*A vehicle speed reading can be obtained with the diagnostics instrument, command menu "Read functions" and "Output speed”.

Table connector B


Pin, connector B (control module) Component/ Function In/Out Test conditions Test between Test reading See
6 Transmission range switch In Ignition ON. Reverse of P engaged. 0V in other positions 6-ground 12V
7 Transmission range switch In Ignition ON. Drive or manual shift engaged. 0V in other positions 7-ground 12V
8 Solenoid S3 Out Ignition ON 8-ground 10.5V
12 Solenoid SLU In 12-B+ 12V
13 Solenoid S5 Out Ignition ON 13-ground
14 Solenoid S4 Out Ignition ON 14-ground
15 Solenoid SLT In 15-B+ 12V
16 Transmission range switch In Ignition ON. R, N, D or manual shift engaged. 0V in other positions 16-ground 12V
17 Transmission range switch In Ignition ON. N or P engaged. 0V in other positions. 17-ground 12V
21 Oil temp sensor Out Ignition ON. Cold engine 21-ground 2.6V
22 Sensor speed signal input In Ignition ON. Engine off, P engaged. 22-32 9V
22 Sensor speed signal input In Ignition ON. Engine idling, P engaged. 22-32 12.2V
23 Sensor speed signal input In Ignition ON. Engine off, P engaged. 22-33 9V
23 Sensor speed signal input In Ignition ON. Engine idling, P engaged. 22-33 11.8V
24 Solenoid S2 Out Ignition ON. Selector lever in R position 24-ground 11.2V
25 Lock-up solenoid, SLU + Out Ignition ON. Selector lever in P position 25-12 1.1V
26 Clutch system pressure solenoid SLS Out Ignition ON. Selector lever in P position 26-36 1.7V
31 Transmission fluid temperature sensor In Ignition ON 31-B+ 12V
32 Input shaft speed sensor Out Ignition ON 32-ground 10.8V
33 Output shaft speed sensor Out Ignition ON 33-ground 10.8V
34 Solenoid S1 Out Ignition ON. Selector lever in P, N or D 34-ground 11.6V
35 System pressure solenoid SLT Out Ignition ON 35-15 6.4V
36 Clutch system pressure solenoid, SLS In Ignition ON 31-B+ 12V