PRE-RELEASE
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 |
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Observe the test conditions, use your common sense when assessing the readings obtained.
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The specified values are with the ignition in position ON unless stated otherwise.
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First check that the control module is supplied with current and grounded.
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Then check all sensor inputs and signals from other systems.
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Finally, check the control module inputs. Remember that the test readings do not indicate whether or not the actuator is in working order.
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If any reading is not OK, consult the wiring diagram to determine the leads, connectors or components which ought to be checked more thoroughly.
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The specified test readings refer to those obtained with a calibrated Fluke 88/97.
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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+.
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| 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 |
