Pgm-Fi System: Diagnosis Honda Element I

DTC Troubleshooting

DTC INDEX

DTC P16BB: Alternator B Terminal Circuit Low Voltage (2005-2006 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

1. Turn the ignition switch ON (II).
2. Clear the DTC with HDS.
3. Start the engine.
4. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
5. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES- Go to step 7 . NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, and check the battery performance (see «BATTERY TEST»(ref-220619-S17396884802006022100000) ).
7. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box (+B line). Are the connections and terminals OK? YES- Go to step 8 . NO- Repair the connectors or terminals, then go to step 9 .
8. Check for an open in the wire between the alternator and under fuse/relay box at the starter subharness. Is the harness OK? YES- Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-220559-S01764025892006022000000) ), then go to step 9 . NO- Repair open in the wire between the alternator and the under-hood fuse/relay box, then go to step 9 .
9. Turn the ignition switch ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-220572-S08440202922006022000000) ).
12. Start the engine.
13. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
14. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
15. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- If DTC P16BB is indicated, check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO- Troubleshooting is complete.

DTC P16BC: Alternator FR Terminal Circuit/IGP Circuit Low Voltage (2005-2006 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 3

Scheme 4

Scheme 5

Scheme 6

1. Check for poor connections at the alternator 4P connector. Are the connections OK? YES- Go to step 2 . NO- Repair the connections, then go to step 18 .
2. Turn the ignition switch ON (II).
3. Clear the DTC with the HDS.
4. Start the engine.
5. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
6. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
7. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES- Go to step 8 . NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator.
8. Turn the ignition switch OFF.
9. Disconnect the alternator 4P connector.
10. Turn the ignition switch ON (II).
11. Measure voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage? YES- Go to step 12 . NO- Repair open in the wire between the alternator (IG1 line) and the No. 4 ACG (10 A) fuse in under-dash fuse/relay box, then go to step 18 .
12. Measure voltage between alternator 4P connector terminal No. 4 and body ground. Is there about 5 V? YES- Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-220559-S01764025892006022000000) ), then go to step 18 . NO- Go to step 13 .
13. Turn the ignition switch OFF.
14. Jump the SCS line with the HDS.
15. Disconnect ECM/PCM connector B (24P).
16. Connect alternator 4P connector terminal No. 4 to body ground with a jumper wire.
17. Check for continuity between ECM/PCM connector terminal B13 and body ground. Is there continuity? YES- Go to step 26 . NO- Repair open in the wire between the ECM/PCM (B13) and the alternator, then go to step 18 .
18. Reconnect all connectors.
19. Turn the ignition switch ON (II).
20. Reset the ECM/PCM with the HDS.
21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-220572-S08440202922006022000000) ).
22. Start the engine.
23. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
24. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
25. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- If DTC P16BC is indicated, check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting . NO- Troubleshooting is complete.
26. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ).
27. Start the engine.
28. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
29. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
30. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- If DTC P16BC is indicated, check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting . NO- If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).

DTC P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle.
4. Test-drive under these conditions: ECT SENSOR above 158°F (70°C) A/T in D position (M/T in 3rd gear) Drive the vehicle between 25 mph (40 km/h) and 55 mph (88 km/h) for 5 minutes. Drive at a steady speed between 55 mph (88 km/h) and 75 mph (120 km/h) for 10 seconds, then slow down with the throttle completely closed for 4 seconds.
5. Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES- Go to step 6 . NO- If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
6. Turn the ignition switch OFF.
7. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-220570-S42298875192006022000000) ).
8. Turn the ignition switch ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-220572-S08440202922006022000000) ).
11. Test-drive under these conditions: ECT SENSOR above 158°F (70°C) A/T in D position (M/T in 3rd gear) Drive the vehicle between 25 mph (40 km/h) and 55 mph (88 km/h) for 5 minutes. Drive at a steady speed between 55 mph (88 km/h) and 75 mph (120 km/h) for 10 seconds, then slow down with the throttle completely closed for 4 seconds.
12. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- If DTC P2A00 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO- Go to step 13 .
13. Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES- Troubleshooting is complete. NO- If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 10 and recheck.

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

Scheme 38

1. Turn the ignition switch ON (II).
2. Do the gauge self-diagnostic procedure (see «SELF-DIAGNOSTIC FUNCTION»(ref-220622-S30713214262006022100000) ). Does the MIL flash? YES- Go to step 3 . NO- Substitute a known-good gauge assembly, and recheck. If the MIL circuit is OK, replace the original gauge assembly.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON (II), and watch the MIL. Does the MIL stay off? YES- Go to step 19 . NO- Go to step 5 .
5. Turn the ignition switch OFF.
6. Turn the ignition switch ON (II), wait 20 seconds, and watch the MIL. Does the MIL stay on or flash more than 5 times? YES- Go to step 7 . NO- The MIL circuit is OK.
7. Turn the ignition switch OFF.
8. Connect the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-220569-S20216730692006022000000) ).
9. Turn the ignition switch ON (II), and read the HDS. Does the HDS communicate with the ECM/PCM? YES- Go to step 10 . NO- Go to "DLC Circuit Troubleshooting" (see «DLC CIRCUIT TROUBLESHOOTING»(ref-220570-S13269917602006022000000) ).
10. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- Go to the indicated DTC's troubleshooting. NO- Go to step 11 .
11. Check the MIL in the DATA LIST with the HDS. Is ON indicated? YES- Go to step 12 . NO- Substitute a known-good gauge assembly, and recheck. If the MIL circuit is OK, replace the original gauge assembly (see «GAUGE ASSEMBLY REPLACEMENT»(ref-220622-S01752200552006022100000) ).
12. Check the SCS in the DATA LIST with the HDS. Is a short indicated? YES- Go to step 13 . NO- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).
13. Turn the ignition switch OFF.
14. Jump the SCS line with the HDS.
15. Disconnect ECM/PCM connector E (31P), then disconnect the HDS.
16. Check for continuity between ECM/PCM connector terminal E29 and body ground. Is there continuity? YES- Repair short in the wire between the ECM/PCM (E29) and the DLC. NO- Go to step 17 .
17. Disconnect gauge assembly connector B (16P).
18. Check for continuity between ECM/PCM connector terminal E31 and body ground. Is there continuity? YES- Repair short in the wire between the ECM/PCM (E31) and the gauge assembly. NO- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).
19. Try to start the engine. Does the engine start? YES- Go to step 20 . NO- Go to step 26 .
20. Turn the ignition switch OFF.
21. Connect ECM/PCM connector terminal E31 to body ground with a jumper wire.
22. Turn the ignition switch ON (II). Is the MIL on? YES- Go to step 23 . NO- Check for an open in the wire between the ECM/PCM (E31) and the gauge assembly.
23. Turn the ignition switch OFF.
24. Connect the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-220569-S20216730692006022000000) ).
25. Turn the ignition switch ON (II), and read the HDS. Does the HDS communicate with the ECM/PCM? YES- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). NO- Go to "DLC Circuit Troubleshooting" (see «DLC CIRCUIT TROUBLESHOOTING»(ref-220570-S13269917602006022000000) ).
26. Turn the ignition switch OFF.
27. Inspect the No. 20 IG1 (50 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES- Check for an open in the wire between the No. 20 IG1 (50 A) fuse and the ignition switch. If the wire is OK, go to step 28 . NO- Repair short in the wire between No. 20 IG1 (50 A) fuse and the under-hood fuse/relay box. Also replace the No. 20 IG1 (50 A) fuse.
28. Inspect the No. 6 FI ECU (15 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES- Go to step 35 . NO- Go to step 29 .
29. Remove the blown No. 6 FI ECU (15 A) fuse from the under-hood fuse/relay box.
30. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(ref-220597-S26723889242006022100000) ) and PGM-FI main relay 1 (FI MAIN) (A).
31. Check for continuity between body ground and PGM-FI main relay 1 (FI MAIN) 4P connector terminals No. 2 and No. 4 individually. Is there continuity? YES- Repair short in the wire between the No. 6 FI ECU (15 A) fuse and PGM-FI main relay 1 (FI MAIN). Also replace the No. 6 FI ECU (15 A) fuse. NO- Go to step 32 .
32. Disconnect each of the components or connectors below, one at a time, and check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (31P) Each injector 2P connector Idle air control (IAC) valve 3P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Is there continuity? YES- Go to step 33 . NO- Replace the component that made the short to body ground go away when disconnected. If the item is the ECM/PCM, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). Also replace the No. 6 FI ECU (15 A) fuse.
33. Disconnect the connectors from these components: PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (31P) Injectors Idle air control (IAC) valve Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor
34. Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. Is there continuity? YES- Repair short in the wire between PGM-FI main relay 1 (FI MAIN) and each item. Also replace the No. 6 FI ECU (15 A) fuse. NO- Replace PGM-FI main relay 1 (FI MAIN). Also replace the No. 6 FI ECU (15 A) fuse.
35. Inspect the No. 17 FUEL PUMP (15 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES- Go to step 48 . NO- Go to step 36 .
36. Remove the blown No. 17 FUEL PUMP (15 A) fuse from the under-dash fuse/relay box.
37. Jump the SCS line with the HDS.
38. Disconnect ECM/PCM connector E (31P).
39. Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES- Go to step 40 . NO- Replace the No. 17 FUEL PUMP (15 A) fuse, and update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).
40. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(ref-220597-S26723889242006022100000) ), and remove PGM-FI main relay 2 (FUEL PUMP) (A) from the under-hood fuse/relay box.
41. Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES- Repair short in the wire between the No. 17 FUEL PUMP (15 A) fuse and the ECM/PCM (E9), or between the No. 17 FUEL PUMP (15 A) fuse and PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 17 FUEL PUMP (15 A) fuse. NO- Go to step 42 .
42. Remove the center console (see «CENTER CONSOLE REMOVAL/INSTALLATION»(ref-220596-S10314966712006022100000) ), the cargo floor covering (see «FRONT FLOOR COVERING»(ref-220595-S23251885042006022100000) ), and both door sill trims (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(ref-220595-S41722068182006022100000) ).
43. Fold back the floor covering until the access panel is accessible.
44. Disconnect the fuel pump 5P connector.
45. Check for continuity between fuel pump 5P connector terminal No. 5 and body ground. Is there continuity? YES- Repair short in the wire between the fuel pump and PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 17 FUEL PUMP (15 A) fuse. NO- Go to step 46 .
46. Reinstall PGM-FI main relay 2 (FUEL PUMP) (A).
47. Check for continuity between fuel pump 5P connector terminal No. 5 and body ground. Is there continuity? YES- Replace PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 17 FUEL PUMP (15 A) fuse. NO- Check the fuel pump, and replace it if necessary. Also replace the No. 17 FUEL PUMP (15 A) fuse.
48. Jump the SCS line with the HDS.
49. Disconnect ECM/PCM connector E (31P).
50. Turn the ignition switch ON (II).
51. Measure voltage between ECM/PCM connector terminal E9 and body ground. Is there battery voltage? YES- Go to step 52 . NO- Repair open in the wire between the No. 17 FUEL PUMP (15 A) fuse and the ECM/PCM (E9).
52. Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES- Go to step 57 . NO- Go to step 53 .
53. Turn the ignition switch OFF.
54. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(ref-220597-S26723889242006022100000) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-hood fuse/relay box.
55. Measure voltage between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 4 and body ground. Is there battery voltage? YES- Go to step 56 . NO- Repair open in the wire between the No. 6 FI ECU (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
56. Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 3 and ECM/PCM connector terminal E7. Is there continuity? YES- Test PGM-FI main relay 1 (FI MAIN) (see «POWER RELAY TEST»(ref-220620-S08922687602006022100000) ). If the relay is OK, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). NO- Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM (E7).
57. Reconnect ECM/PCM connector E (31P).
58. Turn the ignition switch ON (II).
59. Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually. Is there battery voltage? YES- Go to step 66 . NO- Go to step 60 .
60. Turn the ignition switch OFF.
61. Remove PGM-FI main relay 1 (FI MAIN) (A).
62. Turn the ignition switch ON (II).
63. Measure voltage between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 2 and body ground. Is there battery voltage? YES- Go to step 64 . NO- Repair open in the wire between the No. 6 FI ECU (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
64. Turn the ignition switch OFF.
65. Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and ECM/PCM connector terminals A2 and A3 individually. Is there continuity? YES- Replace PGM-FI main relay 1 (FI MAIN). NO- Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM (A2, A3).
66. Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A8, and A9 individually. Is there more than 0.2 V? YES- Repair open in the wire(s) that had more than 0.2 V between G101 and the ECM/PCM (A4, A5, A8, A9). NO- 2003-2004 models: Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). 2005-2006 models: Go to step 67 .
67. Measure voltage between body ground and ECM/PCM connector terminal A21. Is there about 5 V? YES- Go to step 75 . NO- Go to step 68 .
68. Turn the ignition switch OFF.
69. Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A21 with the ignition switch ON (II). MAP sensor Output shaft (countershaft) speed sensor Is there about 5 V? YES- Replace the sensor that restored 5 V when disconnected. NO- Go to step 70 .
70. Turn the ignition switch OFF.
71. Jump the SCS line with the HDS.
72. Disconnect the connectors from these sensors: MAP sensor Output shaft (countershaft) speed sensor
73. Disconnect ECM/PCM connector A (31P).
74. Check for continuity between ECM/PCM connector terminal A21 and body ground. Is there continuity? YES- Repair short in the wire between the ECM/PCM (A21) and the MAP sensor, or the output shaft (countershaft) speed sensor. NO- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).
75. Measure voltage between body ground and ECM/PCM connector terminal A20. Is there about 5 V? YES- Go to step 83 . NO- Go to step 76 .
76. Turn the ignition switch OFF.
77. Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A20 with the ignition switch ON (II). TP sensor Input shaft (mainshaft) speed sensor Is there about 5 V? YES- Replace the sensor that restored 5 V when disconnected. NO- Go to step 78 .
78. Turn the ignition switch OFF.
79. Jump the SCS line with the HDS.
80. Disconnect the connector from these sensors: TP sensor Input shaft (mainshaft) speed sensor
81. Disconnect ECM/PCM connector A (31P).
82. Check for continuity between ECM/PCM connector terminal A20 and body ground. Is there continuity? YES- Repair short in the wire between the ECM/PCM (A20) and the TP sensor, or the input shaft (mainshaft) speed sensor or EGR valve. NO- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).
83. Measure voltage between body ground and ECM/PCM connector terminal E5. Is there about 5 V? YES- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). NO- Go to step 84 .
84. Turn the ignition switch OFF.
85. Disconnect the FTP sensor 3P connector, and measure voltage between body ground and ECM/PCM connector terminal E5 with the ignition switch ON (II). Is there about 5 V? YES- Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(ref-220577-S39356661002006022000000) ). NO- Go to step 86 .
86. Turn the ignition switch OFF.
87. Jump the SCS line with the HDS.
88. Disconnect the FTP sensor 3P connector.
89. Disconnect ECM/PCM connector E (31P).
90. Check for continuity between ECM/PCM connector terminal E5 and body ground. Is there continuity? YES- Repair short in the wire between the ECM/PCM (E5) and the FTP sensor. NO- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).

DLC Circuit Troubleshooting

Note. If the ECM/PCM does not communicate with the HDS or I/M test equipment, do this troubleshooting procedure. Check that MIL circuit is normal, then do this troubleshooting.

Scheme 39

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

1. Measure voltage between DLC terminal No. 16 and body ground. Is there battery voltage? YES- Go to step 2 . NO- Repair open in the wire between DLC terminal No. 16 and the No. 9 BACK UP (10 A) fuse in the under-hood fuse/relay box.
2. Measure voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES- Go to step 3 . NO- Repair open in the wire between DLC terminal No. 4 and body ground (G451).
3. Measure voltage between DLC terminals No. 5 and No. 16. Is there battery voltage? YES- Go to step 4 . NO- Repair open in the wire between the ECM/PCM (E3) and DLC terminal No. 5.
4. Turn the ignition switch ON (II).
5. Measure voltage between DLC terminals No. 5 and No. 7. Is there 8.5 V or more? YES- Go to step 11 . NO- Go to step 6 .
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect ECM/PCM connector E (31P).
9. Check for continuity between DLC terminal No. 7 and body ground. Is there continuity? YES- Repair short to ground in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with the HDS, then go to the «DTC TROUBLESHOOTING»(ref-220570-S01813257032006022000000) . NO- Go to step 10 .
10. Check for continuity between DLC terminal No. 7 and ECM/PCM terminal E23. Is there continuity? YES- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). NO- Repair open in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with the HDS, then go to the «DTC TROUBLESHOOTING»(ref-220570-S01813257032006022000000) .
11. Turn the ignition switch OFF.
12. Jump the SCS line with the HDS.
13. Disconnect ECM/PCM connector E (31P).
14. Turn the ignition switch ON (II).
15. Measure voltage between DLC terminals No. 5 and No. 7. Is there 0 V? YES- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ). NO- Repair short to power in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with the HDS, then go to the «DTC TROUBLESHOOTING»(ref-220570-S01813257032006022000000) .

Scheme 46

Scheme 47

1. Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(ref-220573-S24675581272006022000000) ).
2. Remove the intake manifold cover (see step 3 on «REMOVAL»(ref-220566-S41055966322006022000000) ).
3. Disconnect the connectors from the injectors (A).
4. Remove the ground cable bolt (G101) (B).
5. Disconnect the quick-connect fittings (C).
6. Remove the fuel rail mounting nuts (D) from the fuel rail (E).
7. Remove the injector clip (F) from the injector.
8. Remove the injector from the fuel rail.
9. Coat the new O-rings (A) with clean engine oil, and insert the injectors (B) into the fuel rail (C).
10. Install the injector clip (D).
11. Coat the injector O-rings (E) with clean engine oil.
12. Install the injectors in the injector base (F).
13. Install the fuel rail mounting nuts (G) and the ground cable bolt (G101).
14. Connect the connectors on the injectors.
15. Connect the quick-connect fitting (see «FUEL LINE/QUICK-CONNECT FITTING INSTALLATION»(ref-220573-S14346022232006022000000) ).
16. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel pressure in the fuel line rises. Repeat this two or three times, then check for fuel leakage.
17. Install the intake manifold cover.