Test TC-86A: Speed Control Switch Always High
WARNING: This page is about a different car, the 1998 Plymouth Breeze, 1998 Dodge Stratus, and 1998 Chrysler Cirrus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagram, refer to WIRING DIAGRAMS
.
- Using scan tool, read speed control inputs. While observing scan tool display, push speed control ON/OFF switch several times and leave on. If scan tool displays speed control switch on and off, go to TEST TC-86B . If scan tool does not display speed control switch on and off, go to next step.
- Disconnect 2-pin speed control ON/OFF switch connector (located behind speed control ON/OFF switch). Using a voltmeter, check voltage of speed control signal circuit on 2-pin speed control switch connector (PCM side). See SPEED CONTROL SWITCH CONNECTOR WIRE IDENTIFICATION table. If voltage is 4.8 volts or less, go to next step. If voltage is more than 4.8 volts, repair short to voltage on signal circuit. Perform TEST SC-VER .
- Turn ignition off. Using an ohmmeter, check resistance of ground circuit on 2-pin speed control switch connector (PCM side). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open ground circuit. Perform TEST SC-VER .
- Disconnect Powertrain Control Module (PCM) connector. Using an ohmmeter, check resistance of speed control signal circuit between 2-pin speed control switch connector (PCM side) and PCM connector terminal No. 41. See SPEED CONTROL SWITCH CONNECTOR WIRE IDENTIFICATION table and PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, go to step 6).
- Using an ohmmeter, check resistance across speed control ON/OFF switch terminals. If resistance is less than 25 k/ohms, replace PCM. Perform TEST SC-VER . If resistance is 25 k/ohms or more, replace speed control ON/OFF switch. Perform TEST SC-VER .
- Disconnect 4-pin clockspring connector. Using an ohmmeter, check resistance of speed control ON/OFF switch signal circuit between 4-pin clockspring connector and PCM connector terminal No. 41. See CLOCKSPRING CONNECTOR WIRE IDENTIFICATION table and PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, repair open signal circuit at clockspring connector. Perform TEST SC-VER . If resistance is 5 ohms or more, repair open signal circuit between 4-pin clockspring connector and PCM connector terminal No. 41. Perform TEST SC-VER .
SPEED CONTROL SWITCH CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color |
|---|---|
| Speed Control Switch Signal Circuit | Pink/Light Green |
| Ground Circuit | Black/Light Green |
PCM CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color |
|---|---|
| PCM Terminal No. 41 (Speed Control Switch Signal Circuit) | Pink/Light Green |
CLOCKSPRING CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color |
|---|---|
| Speed Control Switch Signal Circuit | Pink/Light Green |