Checking the Pedal Switch and Selector Lever Position Sensor

1 Connect the BOB and check that about 12 V is present across pin D (4) of the Cruise Control connector and a good ground when the selector lever is in position D, 1 2 or 3.
There should be zero voltage (0 V) when the selector lever is in position P, R or N.
2 If the voltage reading is not OK, check that about 12 V is present on pin 1 of the brake pedal switch when the selector lever is in position D, 1, 2 or 3 and 0 V when it is in position P, R or N.
If the voltage is OK, continue with point 5.







3 If the voltage is not OK, check that about 12 V is present on pin 3 of the selector lever's 4-pin connector.
If the voltage is OK, continue with point 4.
If the voltage is not OK, measure the resistance across the load side of the fuse and pin 3 of the selector lever's 4-pin connector.
If the resistance is > 1 ohm, check the wiring and rectify the fault.
4 Check the wiring for continuity or a short circuit by measuring the resistance across pin 4 of the selector lever's 4-pin connector and pin 1 of the brake pedal switch connector.
If the resistance is ≤ 1 ohm, the fault is in the selector lever.
Check or adjust the selector lever as described in "Automatic transmission".
If the resistance is > 1 ohm, check the wiring and rectify the fault.







5 Measure the resistance across pins 1 and 2 of the brake pedal switch when the brake pedal is depressed and also when it is not depressed.
If the resistance with the pedal in the normal position (not depressed) is > 1 ohm, adjust the pedal switch or perhaps install a new one.
Depressing the pedal breaks the circuit. If resistance can be measured in the circuit, install a new pedal switch.
6 If the pedal switch is OK, check the wiring for continuity or a short circuit by measuring the resistance across pin 2 of the brake pedal connector and pin D (4) of the Cruise Control connector.
The resistance should be ≤ 1 ohm.
If it is > 1 ohm, check the wiring and rectify the fault.
7 If no fault has been found after carrying out the above checks, continue fault diagnosis as described "Before Control Module Replacement".