TEST
ACTION
APPLICABILITY
5
NOTE: Ensure the voltmeter leads meet the terminals in the connector and
that there is good terminal to wire contact.
NOTE: Ensure the voltmeter leads are connected for positive polarity
Using a voltmeter, perform a voltage drop test by backprobing the TPS Ground
circuit in the ETC Assembly harness connector and in the PCM harness connector.
Start the engine.
Allow the engine to idle.
Is the voltage below 0.10 volt?
All
Yes
→ Go To 6
No
→ Repair the resistance in the Ground Sensor circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
6
Turn the ignition on, engine not running.
Use the DRBIII
t/PEP Module as a Dual Channel Lab Scope with Miller Special tool
#6801.
Backprobe the TPS #1 Signal circuit in the ETC Assembly harness connector using
Channel 1.
Backprobe the TPS #2 Signal circuit in the ETC Assembly harness connector using
Channel 2.
Using the DRBIII
t, perform the ETC System Test.
While monitoring the scope pattern display, fully open and fully close the ETC.
Compare the Scope Patterns on the DRB with the Charts and Graphs Typical TP
Sensor Signal Scope Pattern.
Does the actual scope pattern match the Typical TP Sensor Signal Scope Pattern?
All
Yes
→ Go To 7
No
→ Replace the ETC Assembly.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
7
NOTE: Before Continuing: Disconnect the PCM harness connector and
check the related wiring terminals for corrosion, damage or terminal push
out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - 1.6L.
238
DRIVEABILITY - 1.6L GAS
P2135-THROTTLE POSITION SENSOR #1 AND #2 VOLTAGE CORRELA-
TION —
Continued