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Retrieving Diagnostic Trouble Codes

NOTE: If vehicle is to be operated in diagnostics without engine running for an extended time period, use battery charger to prevent battery from running down or system setting false diagnostic information. DTC B1982 may set if vehicle is connected to a battery charger on fast or boost charge.

To retrieve DTCs using scan tool, select Instrument Panel Cluster (IPC) data on scan tool. Select DTC function for IPC. Select HISTORY or CURRENT DTC display function to view corresponding codes.

To enter diagnostic mode using on-board diagnostics, turn ignition on. Simultaneously press OFF and passenger warmer buttons on climate control panel. Pressing low (fan speed) button will scroll through modules available. Scroll through until IPC? appears. Pressing high (fan speed) button will scroll through functions of selected module (i.e., IPC DATA, IPC INPUTS, IPC OUTPUTS, etc.). Scroll through until IPC CODES? appears. Press high (fan speed) button until all IPC DTCs appear. Note codes and go to INSTRUMENT PANEL CLUSTER DIAGNOSTIC TROUBLE CODE DEFINITION  table. To exit diagnostic mode, press rear defogger or MODE button on CCP, or turn ignition off. DTCs will not be cleared. System will return to normal vehicle operation.

INSTRUMENT PANEL CLUSTER DIAGNOSTIC TROUBLE CODE DEFINITION

DTC (1) Description
B0532  Fuel Sensor Shorted To Ground
B0533  Fuel Sensor Open/Short To Battery
B1552  Loss of Keep Alive Memory (KAM)
B1556  IPC EEPROM Odometer Error
B1557  EEPROM Calibration Error
B1910 (2) Generator "L" Terminal Open Circuit
B1911 (2) Generator "L" Terminal Malfunction
B1981  Source Voltage Low (Engine Running)
B1982  Device Power 1 Circuit High
B1983  Device Power 1 Circuit Low
B2419  Twilight Sentinel Photo Sensor Malfunction
B2510  Steering Wheel Controls HVAC Key Stuck
B2511  Steering Wheel Controls Convenience Key Stuck
B2515  Steering Wheel Controls Illegal Resistance Value
B2710 (3) PASS-Key(R) II Open/Short Key Pellet
B2711 (3) PASS-Key(R) II Open/Short Key Pellet
B2750 (3) PASS-Key(R) II Data Communication Malfunction
B2780 (3) PASS-Key(R) II Wrong Resistor Value Before Good
B2781 (3) PASS-Key(R) II Wrong Resistor Value After Good
B2782 (3) PASS-Key(R) II Pellet Value Not Programmed
B2783 (3) PASS-Key(R) II Code/Password Corrupted
U1016 (4) Loss Of Communication With PCM
U1040 (4) Loss Of Communication With ABS
U1064 (4) Loss Of Communication With BCM
U1088 (4) Loss Of Communication With SDM
U1144 (4) Loss Of Communication With PHN
U1152 (4) Loss Of Communication With ACM
U1153 (4) Loss Of Communication With CCP
U1000 & U1255 (4) Class 2 Communication Malfunction
(1) See appropriate procedure under DIAGNOSTIC TESTS  .
(2) See SELF-DIAGNOSTIC SYSTEM in appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
(3) See SELF-DIAGNOSTIC SYSTEM in ANTI-THEFT SYSTEMS - ELDORADO article.
(4) See SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - ELDORADO article.
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