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P1597-SPEED CONTROL SWITCH ALWAYS LOW —
TEST
4
Turn the ignition off.
Disconnect the Speed Control On/Off Switch harness connector.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (Z123) Ground circuit and the (V37) Speed
Control Switch Signal circuit at the Speed Control Switch.
Is the resistance below 5.0 ohms?
Yes → Repair the short to (Z123) Ground circuit in the (V37) Speed
No
5
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.
Repair
ACTION
Control Switch Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
→ Go To 5
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
DRIVEABILITY - GAS
217
Continued
APPLICABILITY
All
All
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