Chrysler 1997 Stratus Convertible RHD Service Manual page 313

JX
DIAGNOSIS AND TESTING (Continued)
Diagnostic Hex Code
Trouble
Code
15** 23
34* OF
or
56
or
57
55*
77 52
* Check Engine Lamp will not illuminate at all times if this Diagnostic Trouble Code was recorded. Cycle ignition
key as described in manual and observe code flashed by Check Engine Lamp.
** Check Engine Lamp will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
40 way connector at PCM. Check for intermittent
open circuit, wiggle wires while performing test.
(2) If intermittent open, repair circuit.
(3) If continuity is ok, perform continuity test from
pin 1 of RESUME/ACCEL switch connector to
ground. Check for intermittent short, wiggle wires
while performing this test.
(4) If shorted, repair harness for short.
SPEED CONTROL WILL NOT SLOW DOWN
Check for diagnostic trouble codes. If code 34 or no
code present, perform the following test:
(1) Conduct the speed control switch test on the
resume SET/COAST.
(2) If it fails replace switch.
(3) If it passes use an ohmmeter to test continuity
between pin 2 of SET/COAST switch connector and
ground. Wiggle wires while preforming test. If no
continuity repair circuit.
(4) If continuity, test continuity between pin 1 of
SET/COAST switch connector and pin 41 of the PCM
40 way connector. Wiggle wires while preforming
test. If no continuity, repair circuit.
(5) If continuity, disconnect the servo connector.
Test continuity from pin 2 of connector and ground to
test for intermittent short. Wiggle wires while pre-
forming test. If continuity repair circuit.
(6) If no continuity, conduct the servo vacuum test.
If it fails replace servo.
(7) If it passes, replace the PCM.
SPEED CONTROL DIAGNOSTIC TROUBLE CODES
DRB Scan Tool Display
No Vehicle Speed Sensor Signal
Speed Control Solenoid Circuits
MUX S/C Switch High
MUX S/C Switch Low
N/A
S/C Power Relay Circuit
VEHICLE SPEED CONTROL SYSTEM
Description of Diagnostic Trouble Code
No vehicle distance (speed) sensor signal
detected during road load conditions.
An open or shorted condition detected in the
Speed Control vacuum or vent solenoid circuits.
Speed Control switch input above the maximum
acceptable voltage.
Speed Control switch input below the minimum
acceptable voltage.
Completion of fault code display on Check
Engine Lamp.
Malfunction detected with power feed to speed
control servo solneids.
SPEED CONTROL ELECTRICAL TEST
Electronic speed control systems may be tested
using two different methods. One involves use of a
DRB. If this test method is desired, refer to the Pow-
ertrain Diagnostic Test Procedures for charging and
speed control system manual.
The other test method uses a volt/ohm meter. The
volt/ohm meter method is described in the following
tests.
If any information is needed concerning wiring,
refer to Group 8W, Wiring Diagrams (Fig. 4).
CAUTION: When test probing for voltage or conti-
nuity at electrical connectors, care must be taken
not to damage connector, terminals, or seals. If
these components are damaged, intermittent or
complete system failure may occur.
When electrical connections are removed, corrosion
should be removed from electrical terminals and a
light coating of Mopar Multi-Purpose Grease, or
equivalent, applied. Inspect connectors for damage
terminals.
A poor connection can cause a complete or inter-
mittent malfunction and is also the only connection
in the circuit, that can not be tested. For this reason,
a loose connection may be misdiagnosed as a compo-
nent malfunction.
8H - 5