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P0133-O2 SENSOR 1/1 SLOW RESPONSE (CONTINUED) 3. (K41) O2 1/1 SIGNAL CIRCUIT Turn the ignition off Disconnect the 1/1 O2 Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (K41) O2 1/1 Signal circuit in the O2 Sen- Is the voltage between 4.5 and 5.0 volts? Yes >> Go To 4 No >> Check the (K41) O2 1/1 Signal circuit for a short to ground, open, or short to voltage. If OK, replace and pro- Perform the POWERTRAIN VERIFICATION TEST. (Refer 4. (K902) O2 RETURN UPSTREAM CIRCUIT Measure the voltage on the (K902) O2 Return Upstream circuit in the Is the voltage at 2.5 volts? Yes >> Go To 5 No >> Check the (K902) O2 Return Upstream circuit for a short to ground, open, or short to voltage. If OK, replace and Perform the POWERTRAIN VERIFICATION TEST. (Refer 5. O2 SENSOR If there are no possible causes remaining, view repair. Repair Replace the O2 Sensor Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) HB ENGINE ELECTRICAL DIAGNOSTICS 9 - 171 |