2001 JEEP GRAND CHEROKEE pressure

Fig. 2 Pressure Testing Cooling SystemÐTypical

Fig. 1 COOLANT TANK PRESSURE/VENT CAP

OIL PRESSURE GAUGE (Continued)

A/C HIGH PRESSURE SWITCH - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 C18 20DB (RHD DIESEL) A/C PRESSURE SIGNAL
1 C18 18DB (4.0L/LHD DIESEL) A/C PRESSURE SIGNAL
2 C21 20DB/YL A/C SWITCH SENSE
A/C LOW PRESSURE SWITCH - GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 C21 20DB/YL (4.0L/DIESEL) A/C SWITCH SENSE
1 C21 18DB/YL (4.7L) A/C SWITCH SENSE
2 Z1 20BK GROUND
A/C PRESSURE TRANSDUCER - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 K4 18BK/LB SENSOR GROUND
2 K6 18VT/WT 5V SUPPLY
3 C18 18DB A/C PRESSURE SIGNAL
4- -
ACCELERATOR PEDAL POSITION SENSOR (DIESEL) - BLACK 10 WAY
CAV CIRCUIT FUNCTION
1- -
2 K7 18OR 5V SUPPLY
3 K101 18WaT THROTTLE POSITION SENSOR SIGNAL
4 K4 20BK/LB SENSOR GROUND (PCM)
5 K151 18WaT/RD LOW IDLE POSITION SWITCH SENSE
6- -
7 K167 18BR SENSOR GROUND (ECM)
8 K255 18WaT/DB ACCELERATOR PEDAL POSITION SENSOR SIGNAL
9- -
10 K440 18VT/WT 5V SUPPLY
WJ8Wa-80 CONNECTOR PIN-OUTS 8Wa - 80 - 5

BODY CONTROL MODULE C2 - WHITE 22 WAY
CAV CIRCUIT FUNCTION
1 C103 20DG A/C SWITCH SIGNAL
2 V10 20BR WASHER PUMP SWITCH SENSE
3- -
4 L40 22BR HIGH BEAM SWITCH SENSE
5 V11 20BK/TN WASHER FLUID SWITCH SENSE
6 P134 20LG/WT PASSENGER SEAT HEATER SWITCH MUX
7 P133 20LG/RD DRIVER SEAT HEATER SWITCH MUX
8 X20 20RD/YL RADIO CONTROL MUX
9 C8 20DG/RD AMBIENT TEMPERATURE SENSOR SIGNAL
10 L109 20WT ULTRALIGHT SENSOR SIGNAL
11 V52 22DG/RD WINDSHIELD WIPER SWITCH MUX
12 C15 20BK/WT REAR WINDOW DEFOGGER SWITCH SENSE
13 - -
14 - -
15 L27 22WT/TN FOG LAMP SWITCH SENSE
16 - -
17 G18 20PK/BK COOLANT LEVEL SWITCH SENSE
18 P132 20OR/BK SEAT HEATER SWITCH SENSOR GROUND
19 X10 20RD/BK RADIO CONTROL MUX RETURN
20 G39 20DB/OR AMBIENT TEMPERATURE SENSOR RETURN
21 L110 20BK/YL ULTRALIGHT SENSOR RETURN
22 V59 22DB/YL WINDSHIELD WIPER SWITCH RETURN
BOOST PRESSURE SENSOR (DIESEL) - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 K121 18BK/VT SENSOR GROUND
2 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
3 K70 18OR/WT 5V SUPPLY
4 K22 18OR/DB BOOST PRESSURE SENSOR SIGNAL
WJ8Wa-80 CONNECTOR PIN-OUTS 8Wa - 80 - 9

ELECTRONIC SPEED CONTROL SERVO - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 V36 20TN/RD (RHD/GAS) SPEED CONTROL VACUUM SOLENOID CONTROL
1 V36 18TN/RD (LHD DIESEL) SPEED CONTROL VACUUM SOLENOID CONTROL
2 V35 20LG/RD (RHD/GAS) SPEED CONTROL VENT SOLENOID CONTROL
2 V35 18LG/RD (LHD DIESEL) SPEED CONTROL VENT SOLENOID CONTROL
3 V30 20DB/RD SPEED CONTROL BRAKE SWITCH OUTPUT
4 Z1 20BK GROUND
ENGINE CONTROL MODULE C1 (DIESEL) - GRAY 52 WAY
CAV CIRCUIT FUNCTION
1 Z12 14BK/TN GROUND
2 A142 14DG/OR AUTOMATIC SHUT DOWN RELAY OUTPUT
3- -
4- -
5 C13 18DB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL
6 K159 16GY ENGINE SPEED SENSOR SIGNAL
7- -
8 C90 18LG A/C SWITCH SIGNAL
9 K29 18WaT/PK SECONDARY BRAKE SWITCH SENSE
10 C18 18DB A/C PRESSURE SIGNAL
11 K440 18VT/WT 5V SUPPLY
12 K151 18WaT/RD LOW IDLE POSITION SWITCH SENSE
13 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
14 - -
15 - -
16 - -
17 - -
18 G8 18LB/BK FUEL MONITOR SIGNAL
19 - -
20 L50 18WaT/TN PRIMARY BRAKE SWITCH SIGNAL
21 - -
22 - -
23 K255 18WaT/DB ACCELERATOR PEDAL POSITION SENSOR SIGNAL
24 K167 18BR SENSOR GROUND (ECM)
25 - -
26 - -
27 Z12 14BK/TN GROUND
28 A142 14DG/OR AUTOMATIC SHUT DOWN RELAY OUTPUT
29 K35 18GY/YL EGR SOLENOID CONTROL
WJ8Wa-80 CONNECTOR PIN-OUTS 8Wa - 80 - 61

ENGINE COOLANT TEMPERATURE SENSOR - ECM (DIESEL)-2WAY
CAV CIRCUIT FUNCTION
1 K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
2 K121 18BK/VT SENSOR GROUND
ENGINE COOLANT TEMPERATURE SENSOR - PCM (DIESEL)-2WAY
CAV CIRCUIT FUNCTION
1 K222 18TN/RD ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
2 K4 18BK/LB SENSOR GROUND
ENGINE OIL PRESSURE SENSOR - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 K6 18VT/BK (GAS) 5V SUPPLY
1 K6 18VT/WT (DIESEL) 5V SUPPLY
2 G60 18GY/YL ENGINE OIL PRESSURE SENSOR SIGNAL
3 K4 18BK/LB SENSOR GROUND
ENGINE SPEED SENSOR (DIESEL) - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 Z3 18BK/OR GROUND
2- -
3 K24 18GY/BK ENGINE SPEED SENSOR SIGNAL
WJ8Wa-80 CONNECTOR PIN-OUTS 8Wa - 80 - 63

LIFTGATE POWER LOCK MOTOR - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 P35 18OR/VT DOOR LOCK DRIVER
2 P36 18PK/VT DOOR UNLOCK DRIVER
3 P101 18OR/PK LIFTGATE FLIP-UP SWITCH OUTPUT
4 P100 18OR/BR LIFTGATE GLASS LIMIT SWITCH OUTPUT
LINE PRESSURE SENSOR (4.7L) - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 Z13 14BK/RD GROUND
2 T138 14GY/LB 5V SUPPLY
3 T130 14VT/TN LINE PRESSURE SENSOR SIGNAL
4- -
MANIFOLD ABSOLUTE PRESSURE SENSOR (4.0L) - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 K4 18BK/LB SENSOR GROUND
2 K1 18DG/RD MAP SENSOR SIGNAL
3 K7 20OR 5V SUPPLY
WJ8Wa-80 CONNECTOR PIN-OUTS 8Wa - 80 - 81