Pinpoint Test G239843P37

PINPOINT TEST G239843p37 : U2022; CONTROL PANEL COMMUNICATIONS ERROR

G239843t117 : CHECK THE CONTROL PANEL CLOCK CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the control panel electrical connector, CC20.
3. Disconnect the A/CCM electrical connector, AC101.
4. Measure the resistance between CC20, pin 07 (G) and AC101, pin 02 (G).

- Is the resistance greater than 5 ohms?

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

-> NO
GO to Pinpoint Test G239843t118.

G239843t118 : CHECK THE CONTROL PANEL CLOCK CIRCUIT FOR SHORT TO GROUND
1. Reconnect the battery negative terminal.
2. Measure the resistance between CC20, pin 07 (G) 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
GO to Pinpoint Test G239843t119.

G239843t119 : CHECK THE CONTROL PANEL CLOCK CIRCUIT FOR SHORT TO B+
1. Measure the voltage between CC20, pin 07 (G) and GROUND.

- Is the voltage greater than 3 volts?

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

-> NO
GO to Pinpoint Test G239843t120.

G239843t120 : CHECK THE CONTROL PANEL DATA CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between CC20, pin 02 (RU) and AC101, pin 16 (RU).

- Is the resistance greater than 5 ohms?

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

-> NO
GO to Pinpoint Test G239843t121.

G239843t121 : CHECK THE CONTROL PANEL DATA CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between CC20, pin 02 (RU) 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
GO to Pinpoint Test G239843t122.

G239843t122 : CHECK THE CONTROL PANEL DATA CIRCUIT FOR SHORT TO B+
1. Measure the voltage between CC20, pin 02 (RU) and GROUND.

- Is the voltage greater than 3 volts?

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

-> NO
INSTALL a new control panel. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer technical support for advice on possible control module failure.