M/T Model
DTC P1162: A/F Sensor (Sensor 1) Circuit Malfunction-'00-01 M/T modelsNOTE: If DTC P1162 is stored at the same time as DTC P1167, troubleshoot DTC P1162 first, then recheck for DTC P1167.
1. Reset the ECM.
2. Start the engine, and let it idle.
3. Wait at least two minutes.
Is DTC P1162 indicated?
YES - Go to step 4.
NO - Go to step 17.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II).
6. Measure voltage between ECM connector terminals D10 and C18.
Is there more than 0.5 V?
YES - Go to step 7.
NO - Go to step 23.
7. Measure voltage between ECM connector terminals D11 and C18.
Is there more than 0.5 V?
YES - Go to step 8.
NO - Go to step 28.
8. Measure voltage between ECM connector terminals D11 and C18.
Is there more than 5.0 V?
YES - Go to step 9.
NO - Go to step 33.
9. Start the engine. Hold the engine speed at 3,000 rpm with the transmission in neutral until the radiator fan comes on, then let it idle.
10. Measure voltage between ECM connector terminals D10 and C18.
Is there more than 2.6 - 2.8 V?
YES - Go to step 11.
NO - Go to step 37.
11. Measure voltage between ECM connector terminals D4 and C18.
Is there more than 0.4 V?
YES - Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.
NO - Go to step 12.
12. Turn the ignition switch OFF.
13. Disconnect ECM connector D (16P).
14. Check for continuity between ECM connector terminal D4 and body ground.
Is there continuity?
YES - Go to step 15.
NO - Go to step 38.
15. Disconnect the 8P connector from the A/F sensor (Sensor 1).
16. Check for continuity between ECM connector terminal D4 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM (D4) and the A/F sensor (Sensor 1).
NO - Replace the A/F sensor (Sensor 1).
17. Test-drive for several miles with the transmission in 3rd gear. Hold the engine speed at 1,500 rpm.
Is DTC P1162 indicated?
YES - Go to step 18.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the A/F sensor (Sensor 1) and at the ECM.
18. Turn the ignition switch OFF.
19. Disconnect ECM connector D (16P).
20. Disconnect the 8P connector from the A/F sensor (Sensor 1).
21. Connect ECM connector terminal D4 to body ground with a jumper wire.
22. Check for continuity between the A/F Sensor (Sensor 1) 8P connector terminal No.7 to body ground.
Is there continuity?
YES - Check for a poor connection at the Primary HO2S (Sensor 1) connector and at the ECM. If the connections are OK, replace the A/F sensor (Sensor 1).
NO - Repair open in the wire between the ECM (D4) and the A/F sensor (Sensor 1).
23. Turn the ignition switch OFF.
24. Disconnect ECM connector D (16P).
25. Check for continuity between ECM connector terminal D10 and body ground.
Is there continuity?
YES - Go to step 26.
NO - Repair open in the wire between the ECM (D4) and the A/F sensor (Sensor 1).
26. Disconnect the 8P connector from the A/F sensor (Sensor 1)
27. Check for continuity between ECM connector terminal D10 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM (D4) and the A/F sensor (Sensor 1).
NO - Replace the A/F sensor (Sensor 1).
28. Turn the ignition switch OFF.
29. Disconnect ECM connector D (16P).
30. Check for continuity between ECM connector terminal D11 and body ground.
Is there continuity?
YES - Go to step 31.
NO - Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.
31. Disconnect the 8P connector from the A/F sensor (Sensor 1).
32. Check for continuity between ECM connector terminal D11 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM (D11) and the A/F sensor (Sensor 1).
NO - Replace the A/F sensor (Sensor 1).
33. Turn the ignition switch OFF.
34. Disconnect the 8P connector from the A/F sensor (Sensor 1).
35. Turn the ignition switch ON (II).
36. Measure voltage between ECM connector terminals D11 and C18.
Is there more than 5.0 V?
YES - Replace the A/F sensor (Sensor 1).
NO - Substitute a known-good ECM and recheck. If symptom/indication goes away replace the original ECM.
37. Measure voltage between ECM connector terminals D11 and C18.
Is there less than 2.8 V?
YES - Replace the A/F sensor (Sensor 1).
NO - Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.
38. Disconnect the 8P connector from the A/F sensor (Sensor 1).
39. Connect ECM connector terminals D4 to body ground with a jumper wire.
40. Check for continuity between the A/F Sensor (Sensor 1) 8P connector terminal No.7 to body ground.
Is there continuity?
YES - Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.
NO - Repair open in the wire between the ECM (D4) and A/F sensor (Sensor 1)