P0622

: P0622: GENERATOR MONITOR CONTROL CIRCUIT FAULT

G357528t6 : CHECK THE GENERATOR MONITOR CIRCUIT FOR HIGH RESISTANCE
1. Turn the ignition switch to the OFF position.
2. Disconnect the battery negative terminal.
3. Disconnect the generator three-way connector.
4. Disconnect the ECM connector, DL01.
5. Measure the resistance between the three-way connector, pin 01 (W) and DL01, pin 47 (W).

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> No

G357528t7 : CHECK THE GENERATOR MONITOR CIRCUIT FOR SHORT TO B+
1. Reconnect the battery negative terminal.
2. Measure the voltage between DL01, pin 47 (W) and GROUND.

- Is the voltage greater than 1 volt?

-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

-> No

G357528t8 : CHECK THE GENERATOR MONITOR CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between DL01, pin 47 (W) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

-> No
RECHECK DTCs.