P0562

Diagnostic Chart:

Wiring Diagram:

Circuit Description

The Powertrain Control Module (PCM) monitors the ignition voltage on the ignition feed #2 circuit to the PCM. A system voltage DTC will set whenever the voltage is below a calibrated value.


Conditions for Setting the DTC

^ The engine speed is greater than 1300 RPM.

^ The ignition voltage is less than 10V for 240 seconds.


Action Taken When the DTC Sets

^ The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Failure Records buffer.

^ A history DTC is stored.

^ Coolant fan turns ON.


Conditions for Clearing the MIL/DTC

^ A history DTC will clear after 40 consecutive warm up cycles without a fault.

^ DTC(s) can be cleared by using a scan tool.


Diagnostic Aids

^ If the DTC sets when an accessory is operated, check for a poor connection or excessive current draw.

^ Any circuitry, that is suspected as causing the intermittent complaint, should be thoroughly checked for the following conditions:

- Backed out terminals

- Improper mating

- Broken locks

- Improperly formed

- Damaged terminals

- Poor terminal to wiring connections

- Physical damage to the wiring harness

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

1. The Powertrain OBD System Check prompts the technician to complete some basic checks and store the freeze frame and failure records data on the scan tool if applicable. This creates an electronic copy of the data taken when the malfunction occurred. The information is then stored on the scan tool for later reference.

2. This checks if the generator is malfunctioning under load conditions.

3. PCM Controlled Generator Diagnosis will further check the PCMs control of the generator.

4. Checks ignition feed circuit #2 for excessive resistance. An open circuit will cause a no start condition.

7. The replacement PCM must be programmed and the crankshaft position system variation procedure must be preformed. Refer to the latest Techline procedure for PCM reprogramming and also refer to Powertrain Control Module for the Crankshaft Position System Variation Procedure.

9. If no malfunctions have been found at this point and no additional DTCs were set, refer to Diagnostic Aids for additional checks and information.