DTC U0100, U0101, U0122, U0128, U0131, U0151 (Gauge Control Module (Without ACC))

DTC U0100  : Gauge Control Module Lost Communication with ENG/AT DTC U0101  : Gauge Control Module Lost Communication with AT DTC U0122  : Gauge Control Module Lost Communication with VSA Modulator-Control Unit DTC U0128  : Gauge Control Module Lost Communication with EPB DTC U0131  : Gauge Control Module Lost Communication with EPS Unit DTC U0151  : Gauge Control Module Lost Communication with SRS Unit

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
• According to the detected DTC (s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the gauge control module.
• Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC (Gauge Control Module)

1. Problem verification

   -1. Clear the DTC with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   -3. Check for DTCs with the HDS.

   DTC Description	DTC
   U0100 Gauge control module lost communication with ENG/AT
   U0101 Gauge control module lost communication with AT
   U0122 Gauge control module lost communication with VSA modulator-control unit
   U0128 Gauge control module lost communication with EPB
   U0131 Gauge control module lost communication with EPS Unit
   U0151 Gauge control module lost communication with SRS unit

   Are any DTCs indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control units and the gauge control module.

2. Open wire check (F-CAN A_H line, F-CAN A_L line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the receiving control unit connector.

   Gauge control module connector A (32P)

   -3. U0100: Jump the SCS line with the HDS, and wait more than 1 minute.

   SCS short

   U0151: Do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.

   -4. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

   DTC	Connector
   U0100	PCM connector A (50P)
   U0101	TCM 50P connector
   U0122 U0128	VSA modulator-control unit 46P connector
   U0131	EPS control unit connector B (6P)
   U0151	SRS unit connector A (43P)

   -5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN A_H circuit and the F-CAN A_L circuit.

   Test condition

   Vehicle OFF (LOCK) mode Gauge control module connector A (32P): disconnected Transmitting control unit connector (s) for indicated DTCs: disconnected

   DTC	Circuit name	Receiving control unit		Transmitting control unit
   		Connector	Terminal	Connector	Terminal
   U0100	F-CAN A_H	Gauge control module connector A (32P)	No. 20	PCM connector A (50P)	No. 37
   	F-CAN A_L		No. 21		No. 36
   U0101	F-CAN A_H	Gauge control module connector A (32P)	No. 20	TCM 50P connector	No. 3
   	F-CAN A_L		No. 21		No. 11
   U0122 U0128	F-CAN A_H	Gauge control module connector A (32P)	No. 20	VSA modulator-control unit 46P connector	No. 20
   	F-CAN A_L		No. 21		No. 21
   U0131	F-CAN A_H	Gauge control module connector A (32P)	No. 20	EPS control unit connector B (6P)	No. 4
   	F-CAN A_L		No. 21		No. 1
   U0151	F-CAN A_H	Gauge control module connector A (32P)	No. 20	SRS Unit Connector for Inputs and Outputs (KA/KC)	No. 16
   	F-CAN A_L		No. 21		No. 17

   Is there continuity?

   YES 

   The F-CAN A_H wire and the F-CAN A_L wire are OK.

   According to the detected DTC on the following table, substitute or replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U0100	Substitute a known-good PCM , then recheck. If DTC U0100 goes away after substitution, replace the original PCM .
   U0101	Substitute a known-good TCM , then recheck. If DTC U0101 goes away after substitution, replace the original TCM .
   U0122 U0128	Replace the VSA modulator-control unit .
   U0131	Replace the EPS control unit (steering gearbox assembly) .
   U0151	Substitute a known-good SRS unit , then recheck. If DTC U0151 goes away after substitution, replace the original SRS unit .

   NO 

   Repair an open in the F-CAN A_H wire and/or the F-CAN A_L wire between the gauge control module and the transmitting control unit.