LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 1995 >> Cherokee Country, 4WD, Part Time, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Self-Diagnostic Tests >> Test 3A - Acceleration Switch Not Processable

Test 3A - Acceleration Switch Not Processable

NOTE: Perform TEST 1A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  under DIAGNOSIS & TESTING. For wiring diagram, see WIRING DIAGRAM  . Perform VERIFICATION TEST VER-1A  after each repair. Acceleration switch may also be called "G" switch.
  1. Ensure acceleration switch is properly installed. If not properly installed, repair as necessary. If acceleration switch is properly installed, turn ignition off. Disconnect ECU 55-pin connector and acceleration switch 3-pin connector and ensure connectors are clean and not damaged. Repair connectors as necessary.
  2. Turn ignition on. Using scan tool in voltmeter mode, check for voltage at all acceleration switch connector terminals. If voltage is not present at all terminals, go to next step. If voltage is present at any terminal, repair short to voltage in that acceleration switch circuit.
  3. Turn ignition off. Using scan tool in ohmmeter mode, check resistance at all acceleration switch connector terminals. If resistance is more than 5 ohms at all terminals, go to next step. If resistance at any terminal is less than 5 ohms, repair short to ground in that circuit.
  4. Turn ignition off. Reconnect ECU 55-pin connector. Connect a jumper wire between acceleration switch connector terminal No. 2 (Yellow/Violet wire) switch No. 1 sense circuit and terminal No. 3 (Pink/Orange wire) switch signal circuit. Using scan tool, read acceleration switch status. If scan tool displays "G" SWITCH #1 CLOSED, disconnect jumper wire and go to next step. If scan tool does not display "G" SWITCH #1 CLOSED, go to step 7).
  5. Connect jumper wire between acceleration switch connector terminal No. 1 (Tan/White wire) switch No. 2 sense circuit and terminal No. 3 (Pink/Orange wire) switch signal circuit. Using scan tool, read acceleration switch status. If scan tool does not display "G" SWITCH #2 CLOSED, disconnect jumper wire and go to next step. If scan tool displays "G" SWITCH #2 CLOSED, replace acceleration switch.
  6. Turn ignition off. Reconnect acceleration switch connector. Disconnect ECU 55-pin connector. Using an external ohmmeter, check resistance between ECU 55-pin connector terminal No. 26 (Pink/Orange wire) switch signal circuit and terminal No. 43 (Tan/White wire) switch No. 2 sense circuit. If resistance is less than 5 ohms, go to TEST 26A  . If resistance is more than 5 ohms, repair open in acceleration switch No. 2 sense circuit.
  7. Turn ignition off. Disconnect ECU 55-pin connector. Using an external ohmmeter, check resistance of switch signal circuit between ECU 55-pin connector terminal No. 26 and acceleration switch connector terminal No. 3 (Pink/Orange wire). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in acceleration switch signal circuit.
  8. Reconnect acceleration switch connector. Using an external ohmmeter, check resistance of switch No. 1 sense circuit between ECU 55-pin connector terminals No. 25 (Yellow/Violet wire) and No. 26 (Pink/Orange wire). If resistance is less than 5 ohms, replace ECU. If resistance is more than 5 ohms, repair open in switch No. 1 sense circuit.
scientia non olet · About LEMON Manuals