Dodge R1500 1999 Service Manual page 262

10) If governor pressure voltage is than .12-.80 volt, go to
next step. If governor pressure voltage is .80 volt or greater, go to
test DTC P1763B: GOVERNOR PRESSURE SENSOR VOLTS TOO HIGH (AN & DN
BODIES).
11) Wiggle wiring harness between PCM and governor pressure
sensor while monitoring governor pressure voltage on scan tool. If
voltage changes while wiggling wiring harness, repair wiring harness
as necessary. If voltage does not change, conditions required to set
DTC P1764 are not present at this time. DTC P1764 sets if governor
pressure sensor input is less than .1 volt for 8.5 seconds. Possible
causes are: PCM internally shorted or open, incorrectly wired, dirty
or corroded connectors or open or shorted wiring. See INACTIVE DTC
CONDITION under SELF-DIAGNOSTIC SYSTEM. Testing is complete.
Diagnostic Procedures (BR Body)
1) Using scan tool, read DTCs. If DTC SPECIFIC GOOD TRIPS
counter is not displayed or displayed count is not "0", go to step
23). If DTC SPECIFIC GOOD TRIPS counter is displayed and displayed
count is "0", go to next step.
2) Turn ignition off. Disconnect transmission solenoid
harness connector. Inspect connector and terminals for damage. Repair
as necessary. If connector and terminals are okay, turn ignition on.
Measure voltage between ground and 5-volt supply circuit at
transmission solenoid harness connector. If voltage is 4.5-5.5 volts,
go to next step. If voltage is not as specified, repair open 5-volt
supply circuit.
3) Reconnect transmission solenoid harness connector. Using
scan tool, read governor pressure sensor voltage. If voltage is
greater than 4.65 volts, go to step 9). If voltage is less than .12
volt, go to next step. If voltage is not .12-.80 volt, go to step 23).
If voltage is .80-4.65 volts, go to step 16).
4) Check and record freeze frame data to determine conditions
which set code. Turn ignition off. Disconnect PCM harness connectors.
Disconnect transmission solenoid harness connector. Inspect connector
and terminals for damage. Repair as necessary. If connector and
terminals are okay, measure resistance between sensor ground circuit
at Black PCM harness connector C1 and governor pressure sensor signal
circuit at White PCM harness connector C2. If resistance is less than
5 ohms, repair governor pressure sensor signal circuit for short to
ground circuit. If resistance is 5 ohms or greater, go to next step.
5) Measure resistance between ground and governor pressure
sensor signal circuit at White PCM harness connector C2. If resistance
is less than 5 ohms, repair governor pressure sensor signal circuit
for short to ground. If resistance is 5 ohms or greater, go to next
step.
6) Drain transmission fluid and remove oil pan. Disconnect
pressure/temperature sensor harness connector. Inspect connector and
terminals for damage. Repair as necessary. If connector and terminals
are okay, reconnect transmission solenoid harness connector. Measure
resistance between ground circuit and governor pressure sensor signal
circuit at governor pressure sensor harness connector. If resistance
is less than 5 ohms, repair or replace transmission solenoid and
harness assembly. If resistance is 5 ohms or greater, go to next step.
7) Measure resistance between ground and governor pressure
sensor signal circuit at governor pressure sensor harness connector.
If resistance is less than 5 ohms, repair or replace transmission
solenoid and harness assembly. If resistance is 5 ohms or greater, go
to next step.
8) Reconnect all harness connectors except
pressure/temperature sensor harness connector. Turn ignition on. Using
scan tool, read governor pressure sensor voltage. If voltage is 4.8
volts or less, replace PCM. If voltage is greater than 4.8 volts,
replace pressure/temperature sensor.