Control System Diagnostic Sheet Reference: Body
PCM BODY HARNESS CONNECTOR PIN DESCRIPTION AND EXPECTED VALUES
| Pin # | Name | Key On | Low Idle | High Idle | Operating Range | Comments |
|---|---|---|---|---|---|---|
| 1 | CTO | 12.2 | 12.2 | 12.4 | 1 - VPWR | Tachometer Output (Aftermarket) |
| 2 | ACCR | B+ | 0/B+ | 0/B+ | 0/B+ | A/C Clutch Relay Control B+ = A/C OFF 0 = A/C ON |
| 3 | DOL | 0 | 0 | 0 | 0 - 5 | Tripminder Fuel Economy Digital Signal |
| 4 | TRO PN | 0 | 0 | 0 | 0/B+ | Starter Relay Enable 0 = Enabled |
| 5 | FPC | 0/B+ | 0 | 0 | 0 | Fuel Pump Relay Control B+ = Pump OFF 0 = Pump ON |
| 6 | N/A | N/A | N/A | N/A | N/A | N/A |
| 7 | TPO | 0 | 0 | 0 | 0 | Throttle Position Output |
| 8 | ACCS | 0 | 0/B+ | 0/B+ | 0/B+ | A/C Cycling Pressure Switch B+ = A/C ON 0 = A/C OFF |
| 9 | SCIL | B+ | B+ | B+ | 0/B+ | Speed Control Indicator B+ = Indicator OFF 0 = Indicator ON |
| 10 | CASEGND | 0 | 0 | 0 | 0 | Chassis Ground |
| 11 | PWR GND | 0 | 0 | 0 | 0 | Power Ground |
| 12 | PTO | 0 | 0/B+ | 0/B+ | 0/B+ | Power Take Off (Aftermarket) 0 = PTO Disengaged B+ = PTO Engaged |
| 13 | CAN1H | 2.7 | 2.7 | 2.7 | -3 - 16 | CAN+ Module Communications |
| 14 | CAN1L | 2.4 | 2.4 | 2.4 | -3 - 16 | CAN- Module Communications |
| 15 | WFS | 4.6 | 4.6 | 4.6 | 4.4 | Water In Fuel Sensor Diesel > 4.4 Water < 3.3 |
| 16 | ACPSW | 0 | 0/B+ | 0/B+ | 0/B+ | A/C Pressure Switch 12 = A/C Pressure < 325 psig 0 = A/C Pressure > 325 psig |
| 17 | PBA | 0/B+ | 0/B+ | 0/B+ | 0/B+ | Park Brake Applied 0 = Brake Applied 12 = Brake OFF |
| 18 | BPP | 0/B+ | 0/B+ | 0/B+ | 0/B+ | Brake Pedal Position 12 = Brake Applied 0 = Brake OFF |
| 19 | FPM | 0/B+ | B+ | B+ | B+ | Fuel Pump Monitor B+ = Fuel Pump ON |
| 20 | SIGRTN2 | 0 | 0 | 0 | 0 | Accelerator Pedal Position Sensor Signal Return |
| 21 | MAFRTN | 0 | 0 | 0 | 0 | Mass Air Flow Sensor Signal Return |
| 22 | VSO | 0 | 0 | 0 | 0 - VBAT | Vehicle Speed Out |
| 23 | PWRGND | 0 | 0 | 0 | 0 | Power Ground |
| 24 | SCCSRTN | 0 | 0 | 0 | 0 | Speed Control Switch Signal Return |
| 25 | APP3 | 1.0 | 1.0 | 1.45 | 0.8 - 3.5 | Accelerator Pedal Track 3 CT = 0.8 - 1.1 WOT = 3.1 - 3.5 |
| 26 | APP1 | 4.1 | 4.1 | 3.5 | 0.7 - 4.2 | Accelerator Pedal Track 1 CT = 3.9 - 4.2 WOT = 0.7 - 1.2 |
| 27 | N/A | N/A | N/A | N/A | N/A | N/A |
| 28 | BPS | 0/B+ | 0/B+ | 0/B+ | 0/B+ | Brake Pressure Switch 0 = Brake Applied B+ = Brake OFF |
| 29 | VREF2 | 5 | 5 | 5 | 5 +/- 0.5 | Reference Voltage |
| 30 | GENIL | 0 | 0 | 0 | 0/B+ | Generator Indicator |
| 31 | SCCS | 6.7 | 6.7 | 6.7 | 0 - 7.0 | Speed Control Command Switches ON = B+ OFF = 0 SET = 2.8 RESUME = 4.7 COAST = 0.8 HOLD = 6.6 |
| 32 | BUS+ | 0.3 | 0.3 | 0.3 | 0 - 5 SCP+ | Module Communications |
| 33 | SIGRTN | 0 | 0 | 0 | 0 | Signal Return |
| 34 | VPWR | B+ | B+ | B+ | B+ | Vehicle Power |
| 35 | VSS | 8.89V | 9.82V | 9.85V | 5.5 - 333 Hz | Vehicle Speed Signal |
| 36 | CPP/TOW | 0V/B+ | 0V/B+ | 0V/B+ | 0V/B+ | Grade Load Switch (Automatic Trans) 0 = Switch OFF B+ = Switch ON Clutch Pedal Position Switch (Manual Trans) 0 = Pedal PRESSED B+ = Pedal OFF |
| 37 | APP2 | 1.53 | 1.53 | 2.00 | 1.4 - 4.1 | Accelerator Pedal Track 2 CT = 1.4 - 1.6 WOT = 3.6 - 4.1 |
| 38 | BARO | 4.6 | 4.6 | 4.6 | 2.4 - 4.8 (early build) 0.5 - 4.5 (late build) |
Barometric Pressure |
| 39 | FEPS | 0 | 0 | 0 | N/A | Flash EPROM Digital Signal |
| 40 | KAPWR | B+ | B+ | B+ | B+ | Keep Alive Power |
| 41 | MAP | 1.35 | 1.41 | 1.61 | 0.5 - 4.5 | Manifold Absolute Pressure 1.35 = 103 kPa (14.9 psi) 4.5 = 300 kPa (43.5 psi) |
| 42 | MAF | 0 | 1.36 | 2.65 | 0 - 4.7 | Mass Air Flow Signal |
| 43 | IAT1 | 2.3 | 3.1 | 2.5 | 0.13 - 4.9 | Intake Air Temperature (Mass Air Flow Assembly) 4.9 = -40°C (-40°F) 0.5 = 100°C (212°F) |
| 44 | BUS- | 4.8 | 4.8 | 4.8 | 0 - 5 | SCP- Module Communications |
| 45 | VREF | 5 | 5 | 5 | 5 +/- 0.5 | Reference Voltage |
| 46 | VPWR | B+ | B+ | B+ | B+ | Vehicle Power |