Honda Ridgeline. Manual — part 77
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−
YES
NO
11-72
PGM-FI System
DTC Troubleshooting (cont’d)
18. Reconnect all connectors.
19. Update the PCM if it does not have the latest
software (see page 11-7), or substitute a known-
good PCM (see page 11-8).
20. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at ECT sensor 1 and the PCM. If the PCM
was updated, substitute a known-good PCM
(see page 11-8), then recheck. If the PCM was
substituted, go to step 1.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-205). If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Is DT C P0117 indicated?
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−
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01
02
SJC8A00K77100090118FAAT30
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−
−
−
−
−
DTC P0118:
YES
NO
YES
NO
YES
NO
11-73
SG2 (GRN/YEL)
JUMPER WIRE
ECT SENSOR 1 2P CONNECTOR
ECT1 (RED/WHT)
ECT SENSOR 1 2P CONNECTOR
ECT1 (RED/WHT)
ECT Sensor 1 Circuit High
Voltage
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch ON (II).
2. Check ECT SENSOR 1 in the DATA LIST with the
HDS.
Go to step 3.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at ECT sensor 1 and the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 1 2P connector.
5. Connect ECT sensor 1 2P connector terminals No. 1
and No. 2 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check ECT SENSOR 1 in the DATA LIST with the
HDS.
Go to step 8.
Go to step 20.
8. Turn the ignition switch OFF.
9. Remove the jumper wire.
10. Turn the ignition switch ON (II).
11. Measure voltage between ECT sensor 1 2P
connector terminal No. 1 and body ground.
Go to step 12.
Go to step 16.
(cont’d)
Wire side of female terminals
Wire side of female terminals
Is about
40 °F (
40 °C) or less, or 4.92 V or
mor e indicated?
Is about
40 °F (
40 °C) or less, or 4.92 V or
mor e indicated?
Is ther e about 5 V ?
03
04
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−
−
−
YES
NO
YES
NO
11-74
PGM-FI System
DTC Troubleshooting (cont’d)
PCM CONNECTOR C (44P)
ECT SENSOR 1 2P CONNECTOR
SG2 (GRN/YEL)
SG2 (GRN/YEL)
PCM CONNECTOR C (44P)
ECT1 (RED/WHT)
ECT SENSOR 1 2P CONNECTOR
ECT1 (RED/WHT)
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector C (44P).
15. Check for continuity between PCM connector
terminal C14 and ECT sensor 1 2P connector
terminal No. 2.
Go to step 27.
Repair open in the wire between the PCM
(C14) and ECT sensor 1, then go to step 22.
16. Turn the ignition switch OFF.
17. Jump the SCS line with the HDS.
18. Disconnect PCM connector C (44P).
19. Check for continuity between PCM connector
terminal C27 and ECT sensor 1 2P connector
terminal No. 1.
Go to step 27.
Repair open in the wire between the PCM
(C27) and ECT sensor 1, then go to step 22.
Wire side of
female terminals
Terminal side of female terminals
Wire side of
female terminals
Terminal side of female terminals
Is ther e continuity?
Is ther e continuity?
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−
−
−
YES
NO
YES
NO
11-75
20. Turn the ignition switch OFF.
21. Replace ECT sensor 1 (see page 11-201).
22. Reconnect all connectors.
23. Turn the ignition switch ON (II).
24. Reset the PCM with the HDS.
25. Do the PCM idle learn procedure (see page 11-273).
26. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at ECT sensor 1 and the PCM, then go to
step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
27. Reconnect all connectors.
28. Update the PCM if it does not have the latest
software (see page 11-7), or substitute a known-
good PCM (see page 11-8).
29. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at ECT sensor 1 and the PCM. If the PCM
was updated, substitute a known-good PCM
(see page 11-8), then recheck. If the PCM was
substituted, go to step 1.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-205). If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Is DT C P0118 indicated?
Is DT C P0118 indicated?
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