PLATE-SEAL 1523732 - Caterpillar

Illustration 1 g00595836
Schematic For Pressure Sensor (Engine Oil)
Illustration 2 g00596060
Schematic For Temperature Sensor (Engine Coolant)
Illustration 3 g00288430
Pulse Width Modulated SignalThis test is provided in addition to the CID 100 and CID 110 troubleshooting procedures. See Testing And Adjusting, "Troubleshooting Diagnostic Codes". The pulse width modulated sensors are listed below.
oil pressure sensor
coolant temperature sensorThese PWM sensors produce a digital signal. In a digital signal, the duty cycle varies as the condition changes. The frequency remains constant.
Table 1
Sensor Specifications    
Engine Oil Pressure Sensor (EOPS) (1)    
Pressure kPa (psi)    Signal Voltage (2)
DCV    Signal Duty Cycle (2)
%    
0 to 69 (0 to 10)     0.92 to 1.44     12.8 to 20.8    
69 to 138 (10 to 20)     1.44 to 1.92     20.8 to 28.1    
138 to 207 (20 to 30)     1.92 to 2.40     28.1 to 35.4    
207 to 276 (30 to 40)     2.40 to 2.89     35.4 to 42.6    
276 to 345 (40 to 50)     2.89 to 3.34     42.6 to 49.6    
345 to 414 (50 to 60)     3.34 to 3.89     49.6 to 56.6    
414 to 483 (60 to 70)     3.89 to 4.29     56.6 to 64.0    
483 to 552 (70 to 80)     4.29 to 4.74     64.0 to 70.5    
552 to 621 (80 to 90)     4.74 to 5.25     70.5 to 78.1    
621 to 690 (90 to 100)     5.25 to 5.74     78.1 to 85.0    
( 1 ) The base frequency is 350 to 650 Hz.
( 2 ) The voltages and currents are guidelines for troubleshooting and are not considered exact. Tolerance is 10%.
Table 2
Sensor Specifications    
Engine Coolant Temperature Sensor (ECTS) (1)    
Temperature °C (°F)    Signal Voltage (2) DCV    Signal Duty Cycle (2) %    
-40 to -29 (-40 to -20)     1.18 to 1.23     10.0 to 10.6    
-29 to -18 (-20 to 0)     1.23 to 1.30     10.6 to 11.6    
-18 to -7 (0 to 20)     1.30 to 142     11.6 to 13.3    
-7 to 4 (20 to 40)     1.42 to 1.63     13.3 to 16.2    
4 to 16 (40 to 60)     1.63 to 1.97     16.2 to 21.1    
16 to 27 (60 to 80)     1.97 to 2.43     21.1 to 27.5    
27 to 38 (80 to 100)     2.43 to 3.00     27.5 to 35.6    
38 to 49 (100 to 120)     3.00 to 3.67     35.6 to 45.0    
49 to 60 (120 to 140)     3.67 to 4.35     45.0 to 54.7    
60 to 71 (140 to 160)     4.35 to 5.00     54.7 to 63.9    
71 to 82 (160 to 180)     5.00 to 5.58     63.9 to 72.0    
82 to 93 (180 to 200)     5.58 to 6.05     72.0 to 78.6    
93 to 104 (200 to 220)     6.05 to 6.42     78.6 to 83.8    
104 to 116 (220