34 Section 2: Troubleshooting DTCs
Step Action Yes No
1
1. Disconnect and reconnect ECM J2 (Black)
connector.
2. Turn Ignition ON, Engine OFF.
3. Clear codes.
4. Turn Ignition OFF, and then back ON.
5. Does DTC return?
Go to step 2.
Problem
corrected.
2
1. Turn Ignition OFF.
2. Back probe terminal J2-14 (Tan wire) of
ECM connector.
3. Connect terminal J2-14 back probe to red
meter test lead on DVOM.
4. Back probe terminal J2-10 (Brown wire) of
ECM connector.
5. Connect terminal J2-10 back probe to
black meter test lead on DVOM.
6. Set DVOM to read volts DC.
7. Turn Ignition ON, Engine OFF.
8. Observe voltage on DVOM.
9. Is reading 0.5 - 4.5 volts DC?
EHT sensor OK.
Reading is above 4.5 volts
DC. EHT sensor is bad.
Replace EFI wire harness.
NOTE: EHT sensor is an
integral part of the EFI
wire harness and is not
sold separately.
DTC P0118 Engine Head Temperature (EHT) Sensor
Non-Scan Diagnostics
1
9
10
18
J2-10 J2-14
Figure 2-23 ECM J2 Connector (Black).
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