Causes: EEPROM trouble EEPROM is not initialized. Controller PWB EEPROM access circuit trouble
Remedy: Check that EEPROM is properly inserted. Save the counter/adjustment values with the DIAG simulation. Use DIAG (SIM16) to cancel U2 trouble. Replace the Controller PWB.
Code: U2 11
Description: Counter check sum error (Controller). Counter data area check sum error
Causes: EEPROM trouble Control circuit trouble by noise Controller PWB EEPROM access circuit trouble
Remedy: Check that EEPROM is properly inserted. Save the counter/adjustment values with the DIAG simulation. Use DIAG (SIM16) to cancel U2 trouble. Replace the Controller PWB.
Code: U2 12
Description: Adjustment value check sum error (Controller)
Causes: EEPROM trouble Control circuit trouble by noise Controller PWB EEPROM access circuit trouble
Remedy: Check that EEPROM is properly inserted. Save the counter/adjustment values with the DIAG simulation. Use DIAG (SIM16) to cancel U2 trouble. Replace the Controller PWB.
Code: U2 90
Description: PCU EEPROM write error
Causes: EEPROM trouble EEPROM is not initialized. PCU PWB EEPROM access circuit trouble
Remedy: Check that EEPROM is properly inserted. Save the counter/adjustment values with the DIAG simulation. Use DIAG (SIM16) to cancel U2 trouble. Replace the Controller PWB.
Code: U2 91
Description: PCU memory check sum error
Causes: EEPROM trouble EEPROM is not initialized. PCU PWB EEPROM access circuit trouble Uninitialized E2PROM installed.
Remedy: Check that EEPROM is properly inserted. Save the counter/adjustment values with the DIAG simulation. Use DIAG (SIM16) to cancel U2 trouble. Replace the Controller PWB.
Code: U6 00
Description: Desk/LCC communication error Communication cable test error after turning on the power or exiting DIAG.
Causes: Improper connection or disconnection of connector and harness Desk control PWB trouble Control PWB (PCU) trouble Malfunction by noise
Remedy: Canceled by turning OFF/ON the power. Check connection of the harness and connector in the communication line.