• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
---|---|---|---|---|---|
APP Sensor 1 - 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P2138 | P2122 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
Boost Sensor - 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P0101 | P0237 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
TC Vane Position Sensor - 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P2563 | P2564 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
EGR Valve - 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P046C | P0405 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
Camshaft 4 X - 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P0340 | P0340 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
Intake Air Flow Valve | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P02E7 | P02E8 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
Fuel Tank Level Sensor 1 and 2 | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P2068 | P2068 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
Oil Pressure Sensor - 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P0522 | P0522 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
Fuel Rail Pressure Sensor 5-Volt Reference | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P0087, P0192 | P0193 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
DPF Differential Pressure Sensor | P0237, P0340, P0462, P0522, P0642, P2067, P2122, P2454, P2564 | P2453, P244B | P2454 | P0238, P0340, P0401, P0463, P0523, P0643, P2068, P2455, P2565 | -- |
PTO Accelerator Position Sensor 5-Volt Reference | -- | -- | -- | -- | -- |
The engine control module (ECM) supplies 5 volts to components through 5-volt reference circuits. These 5-volt reference circuits are independent of each other outside the ECM, but are bussed together in three reference groups inside the ECM. Therefore, a circuit condition on one sensor 5-volt reference circuit may affect multiple components. The ECM monitors voltage on the 5-volt reference circuits.
• | DTC P0643 is not set. |
• | The ignition is ON for more than 2 seconds. |
• | The battery voltage is between 10-16 volts. |
• | DTC P0642 is not set. |
• | The ignition is ON for more than 2 seconds. |
• | The battery voltage is between 10-16 volts. |
The ECM detects the 5-volt reference 1 circuit voltage is less than 4.5 volts.
The ECM detects the 5-volt reference 1 circuit voltage is more than 5.5 volts.
DTC P0642 and P0643 are Type A DTCs.
DTC P0642 and P0643 are Type A DTCs.
Control Module References for scan tool information
⇒ | If the voltage measures 4.7-5.2 volts, replace the camshaft position sensor. |
⇒ | If voltage changes when one of the above components is disconnected, replace the component. Refer to the appropriate replacement procedure. |
⇒ | If no problem was found in the 5-volt reference circuit, replace the ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |