Test readings TCS (382)/ESP (671)
Test readings TCS (382)/ESP (671) |
Scope |
Following are readings and directions for measuring signals and levels of the transmission control module. Pin numbers missing in the table are not used.
Remember |
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Observe the test criteria and use common sense when assessing the test results.
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The test reading presented here are with the ignition ON unless stated otherwise.
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Check first that the control module is receiving power and is grounded.
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Then check all the sensor inputs and signals from other systems.
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Finally, check the control module outputs. Remember that test values do not confirm whether the actuator is in working order.
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If any of the test readings is incorrect, use the wiring diagram to locate the leads, connectors or components that should be checked further.
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Specified test readings are for a calibrated Fluke 88/97.
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Test readings %(+) and ms(+) show the signal pulse ratio and pulse width respectively. A scan tool that can measure pulse ratio and pulse width respectively must be used. The sign indicates a positive trigger pulse, TRIG+.
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Connecting and test readings |
TCS (382)
ESP (671)
Note | ||
All units on the I and P buses send signals. |
Pin, connector A | Component/Function | In/Out | Test criteria | Test across | Test reading |
1 | P-bus | In/Out | 1-2 | 2-3 V | |
2 | P-bus | In/Out | 2-1 | 2-3 V | |
3 | Not connected | ||||
4 | Not connected | ||||
5 | Not connected | ||||
6 | Not connected | ||||
7 | Front right wheel sensor signal input | In | Rotate wheel 1 rev per second | 7-8 | >200 mV AC |
8 | Front right wheel sensor reference ground | In | Rotate wheel 1 rev per second | 8-7 | >200 mV AC |
9 | Rear right wheel sensor signal input | In | Rotate wheel 1 rev per second | 9-10 | >200 mV AC |
10 | Rear right wheel sensor reference ground | In | Rotate wheel 1 rev per second | 10-9 | >200 mV AC |
11 | Ground, logic | In | 11-12 | B+ | |
12 | +30 voltage, logic | In | 12-11 | B+ | |
13 | P-bus | In/Out | 13-14 | 2-3V | |
14 | P-bus | In/Out | 14-13 | 2-3V | |
15 | +X | In | 15-B- | B+ | |
16 | Not connected | ||||
17 | Brake-light switch | Brake pedal inactive | 17-B+ | B+ | |
Brake pedal active | 17-B+ | <0.5V | |||
18 | Vehicle speed signal to CIM | Out | |||
19 | Front left wheel sensor signal input | Rotate wheel 1 rev per second | 19-20 | >200 mV AC | |
20 | Front left wheel sensor reference ground | Rotate wheel 1 rev per second | 20-19 | >200 mV AC | |
21 | Rear left wheel sensor signal input | Rotate wheel 1 rev per second | 21-22 | >200 mV AC | |
22 | Rear left wheel sensor reference ground | Rotate wheel 1 rev per second | 22-21 | >200 mV AC | |
23 | +15 | In | |||
24 | Ground, pump motor | In | 24-25 | B+ | |
25 | +30 voltage, pump motor | In | 25-24 | B+ |