TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Connect the C2 PCM harness connector.
Ignition on, engine not running.
With the DRBIII
t, read the ECT Sensor voltage.
Is the voltage above 4.6 volts?
All
Yes
→ Go To 4
No
→ Go To 7
4
Connect a jumper wire between the (K2) ECT Signal circuit and the (K900) Sensor
ground circuit at the ECT Sensor harness connector.
With the DRBIII
t, read the ECT voltage.
Is the voltage below 1.0 volt?
All
Yes
→ Replace the ECT Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 5
5
Turn the ignition off.
Disconnect the C2 PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K2) ECT Signal circuit from the ECT Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the open in the (K2) ECT Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K900) Sensor ground circuit from the ECT Sensor
harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the open in the (K900) Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
7
Turn the ignition off.
Disconnect the C2 PCM harness connector.
Measure the resistance between ground and the (K2) ECT Signal circuit at the ECT
Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K2) ECT Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 8
69
DRIVEABILITY - NGC
P0116-ENGINE COOLANT TEMPERATURE CIRCUIT PERFORMANCE —
Continued