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Symptom:
P1799-CALCULATED OIL TEMP IN USE
When Monitored and Set Condition:
P1799-CALCULATED OIL TEMP IN USE
When Monitored: Whenever the engine is running. The code is set if any of the following
conditions exist for three consecutive key starts: The thermistor voltage is out of range
(below 0.70 volts or greater than 4.94 volts)
Set Condition: If continuos erratic thermistor voltage is sensed. The thermistor temper-
ature stays below 80 degree's Fahrenheit for an extended period time.
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
SPEED SENSOR GROUND CIRCUIT OPEN
TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE
TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
TRANSMISSION TEMPERATURE SENSOR INOPERATIVE
TCM - HI TRANSMISSION TEMPERATURE SENSOR
TCM - LO TRANSMISSION TEMPERATURE SENSOR
TEST ACTION APPLICABILITY
1NOTE: Low fluid level can be the cause of many Transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIIIt, read the engine DTC's. Check and repair all engine DTC's prior
to performing Transmission Symptom Diagnostics.
With the DRBIIIt, read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0705 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB's related to the symptom.
Perform this procedure prior to Symptom diagnosis.All
Continue
Go To 2
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TRANSMISSION
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Symptom:
*BRAKE SHIFT INTERLOCK OUTPUT OPEN
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
BRAKE SHIFT INTERLOCK CONTROL CIRCUIT OPEN
BRAKE SHIFT INTERLOCK FEED CIRCUIT OPEN
BRAKE SHIFT INTERLOCK SOLENOID
FRONT CONTROL MODULE
TEST ACTION APPLICABILITY
1 Ignition on, engine not running.
With the DRBIIIt, record and erase DTC's.
Turn the ignition off to the lock position.
Turn the ignition on.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay BRAKE SHIFT INTERLOCK OUTPUT OPEN?All
Ye s®Go To 2
No®Go To 8
2 Turn the ignition off to the lock position.
Disconnect the Brake Shift Interlock harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Using a 12-volt test light connected to B+, check the Brake Shift Interlock Control
circuit in the Brake Shift Interlock harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s®Go To 3
No®Go To 6
3 Turn the ignition off to the lock position.
Disconnect the Brake Shift Interlock harness connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the Brake Shift Interlock Feed
circuit in the Brake Shift Interlock harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s®Go To 4
No®Go To 5
4 If there are no possible causes remaining, view repair. All
Repair
Replace the Brake Shift Interlock Solenoid in accordance with the
Service Information.
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TRANSMISSION
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INTELLIGENT POWER MODULE C4 - GRAY 10 WAYCAV CIRCUIT FUNCTION
1 Z127 12BK/DG GROUND
2 T750 12YL/GY ENGINE STARTER MOTOR RELAY OUTPUT
3 K342 16BR/WT AUTOMATIC SHUTDOWN RELAY OUTPUT
4 F500 18DG/PK (ANTILOCK
BRAKES)FUSED IGNITION SWITCH RELAY OUTPUT (RUN)
5- -
6 D25 16WT/VT (ANTILOCK
BRAKES)PCI BUS
7 A107 12TN/RD (ANTILOCK
BRAKES)FUSED B(+)
8 A111 12DG/RD (ANTILOCK
BRAKES)FUSED B(+)
9 A701 14BR/RD FUSED B(+)
10 - -
INTELLIGENT POWER MODULE C5 - BLACK 4 WAYCAV CIRCUIT FUNCTION
1 A1 04RD B(+)
2- -
3- -
4- -
INTELLIGENT POWER MODULE C6 - WHITE 10 WAYCAV CIRCUIT FUNCTION
1 A101 12VT/RD FUSED B(+)
2 Z117 16BK/WT GROUND
3 Z118 16BK/YL GROUND
4 A110 12OR/RD (POWER
SEAT)FUSED B(+)
5- -
6- -
7 C7 12DB FUSED FRONT BLOWER MOTOR RELAY OUTPUT
8 F307 16LB/PK (ACCESSO-
RY RELAY POSITION)FUSED ACCESSORY RELAY OUTPUT
8 F307 16LB/PK (BATTERY
POSITION)FUSED B(+)
9 A113 12WT/RD (POWER
SLIDING DOOR)FUSED B(+)
10 - -
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FUSES (IPM)FUSE
NO.AMPS FUSED CIRCUIT FUNCTION
1 20A INTERNAL FUSED B(+)
2 15A INTERNAL FUSED PARK LAMP RELAY OUTPUT
3 15A INTERNAL FUSED PARK LAMP RELAY OUTPUT
4 30A INTERNAL FUSED B(+)
5 20A F306 16DB/PK FUSED ACCESSORY RELAY OUTPUT
6 20A F307 16LB/PK (BATTERY POSITION) FUSED B(+)
6 20A F307 16LB/PK (ACCESSORY RELAY POSITION) FUSED ACCESSORY RELAY OUTPUT
8 20A INTERNAL FUSED B(+)
9 40A INTERNAL FUSED B(+)
10 40A C7 12DB FUSED FRONT BLOWER MOTOR RELAY OUTPUT
11 20A F302 18GY/PK FUSED ACCESSORY RELAY OUTPUT
12 25A C51 12LB/BR FUSED REAR BLOWER MOTOR RELAY OUTPUT
13 40A C15 12DB/WT FUSED REAR WINDOW DEFOGGER RELAY OUTPUT
14 15A INTERNAL FUSED B(+) (I.O.D.)
15 20A INTERNAL FUSED B(+)
16 25A INTERNAL FUSED B(+)
17 20A INTERNAL FUSED B(+)
18 15A INTERNAL FUSED B(+)
19 40A A101 12VT/RD FUSED B(+)
20 40A A102 12WT/RD FUSED B(+)
21 25A A111 12DG/RD FUSED B(+)
22 40A A110 12OR/RD FUSED B(+)
23 10A A106 20LB/RD FUSED B(+)
24 20A A701 16BR/RD FUSED B(+) (HAZARD)
26 20A A103 18GY/RD FUSED B(+)
27 40A A112 12OR/RD FUSED B(+)
28 40A F30 12PK/YL FUSED ACCESSORY RELAY OUTPUT
30 40A SPARE SPARE
31 40A A113 12WT/RD FUSED B(+)
32 40A A115 12YL/RD FUSED B(+)
33 15A INTERNAL FUSED ACCESSORY RELAY OUTPUT
TRANSMISSION SAFETY SHUTDOWN RELAYCAV CIRCUIT FUNCTION
30 INTERNAL FUSED B(+)
85 Z115 20BK/OR GROUND
86 T15 18YL/BR TRANSMISSION CONTROL RELAY CONTROL
87 T16 18YL/OR TRANSMISSION CONTROL RELAY OUTPUT
87A --
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CONNECTOR PINOUTS