B1D23(DDM), B1D2F(PDM) – MIRROR HORIZONTAL MOTOR CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    When the Mirror Horizontal Driver Output is turned on.

  • Set Condition:

    DTC B1D23 – If the Driver Door Module senses an excessive current draw on the (P75) Driver Mirror Horizontal Driver circuit within 10 ms of turning on the Mirror Horizontal Driver Output.

    DTC B1D2F – If the Passenger Door Module senses an excessive current draw on the (P74) Passenger Mirror Horizontal Driver circuit within 10 ms of turning on the Mirror Horizontal Driver Output.


Possible Causes
 
FOR THE DRIVER MEMORY MIRROR SYSTEM:
 
(P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO GROUND
 
(P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO (Z911) GROUND CIRCUIT
 
(P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO (P69) DRIVER MIRROR SENSOR GROUND CIRCUIT
 
(P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO (C910) DRIVER MIRROR HEATER RETURN CIRCUIT
 
DRIVER OUTSIDE REARVIEW MIRROR SHORTED
 
DRIVER DOOR MODULE
 
FOR THE PASSENGER MEMORY MIRROR SYSTEM:
 
(P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO GROUND
 
(P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO (Z908) GROUND CIRCUIT
 
(P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO (P66) PASSENGER MIRROR SENSOR GROUND CIRCUIT
 
(P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT SHORTED TO (C917) PASSENGER MIRROR HEATER RETURN CIRCUIT
 
PASSENGER OUTSIDE REARVIEW MIRROR SHORTED
 
PASSENGER DOOR MODULE
 


NOTE: This procedure addresses the Driver Memory Mirror system's circuits and components and the Passenger Memory Mirror system's circuits and components. Select only that which applies to the system you are diagnosing.



Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION








Does the scan tool display: B1D23 or B1D2F MIRROR HORIZONTAL MOTOR CONTROL CIRCUIT LOW?

Yes
  • Go To 2


No

2.TEST FOR A SHORTED OUTSIDE REARVIEW MIRROR



For the Driver Memory Mirror System, proceed as follows:
  • Turn the ignition off.
  • Disconnect the Driver Outside Rearview Mirror connector.
  • Turn the ignition on.
  • With the scan tool, erase DTCs.
  • Operate the Mirror Switch in all directions several times.
  • Cycle the ignition from on to off 3 times.
  • Turn the ignition on.
  • With the scan tool, read DTCs.

For the Passenger Memory Mirror System, proceed as follows:
  • Turn the ignition off.
  • Disconnect the Passenger Outside Rearview Mirror connector.
  • Turn the ignition on.
  • With the scan tool, erase DTCs.
  • Operate the Mirror Switch in all directions several times.
  • Cycle the ignition from on to off 3 times.
  • Turn the ignition on.
  • With the scan tool, read DTCs.


Does the scan tool display: B1D23 or B1D2F MIRROR HORIZONTAL MOTOR CONTROL CIRCUIT LOW?

Yes
  • Go To 3


No

3.CHECK THE (P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT OR THE (P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT FOR A SHORT TO GROUND



For the Driver Memory Mirror System, proceed as follows:
  • Turn the ignition off.
  • Disconnect the Driver Door Module C2 connector.
  • Measure the resistance between ground and the (P75) Driver Mirror Horizontal Driver circuit in the Driver Door Module C2 connector.

For the Passenger Memory Mirror System, proceed as follows:
  • Turn the ignition off.
  • Disconnect the Passenger Door Module C2 connector.
  • Measure the resistance between ground and the (P74) Passenger Mirror Horizontal Driver circuit in the Passenger Door Module C2 connector.


Is the resistance below 10000.0 ohms?

Yes, Driver Mirror


Yes, Passenger Mirror


No
  • Go To 4

4.CHECK THE (P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT FOR A SHORT TO THE (Z911) GROUND CIRCUIT



For the Driver Memory Mirror System, proceed as follows:
  • Measure the resistance between the (P75) Driver Mirror Horizontal Driver circuit and the (Z911) Ground circuit in the Driver Door Module C2 connector.

For the Passenger Memory Mirror System, proceed to step 5.

Is the resistance below 10000.0 ohms?

Yes


No
  • Go To 5

5.CHECK THE (P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT FOR A SHORT TO THE (P69) DRIVER MIRROR SENSOR GROUND CIRCUIT OR THE (P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT FOR A SHORT TO THE (P66) PASSENGER MIRROR SENSOR GROUND CIRCUIT



For the Driver Memory Mirror System, proceed as follows:
  • Measure the resistance between the (P75) Driver Mirror Horizontal Driver circuit and the (P69) Driver Mirror Sensor Ground circuit in the Driver Door Module C2 connector.

For the Passenger Memory Mirror System, proceed as follows:
  • Measure the resistance between the (P74) Passenger Mirror Horizontal Driver circuit and the (P66) Passenger Mirror Sensor Ground circuit in the Passenger Door Module C2 connector.


Is the resistance below 10000.0 ohms?

Yes, Driver Mirror


Yes, Passenger Mirror


No
  • Go To 6

6.CHECK THE (P75) DRIVER MIRROR HORIZONTAL DRIVER CIRCUIT FOR A SHORT TO THE (C910) DRIVER MIRROR HEATER RETURN CIRCUIT OR THE (P74) PASSENGER MIRROR HORIZONTAL DRIVER CIRCUIT FOR A SHORT TO THE (C917) PASSENGER MIRROR HEATER RETURN CIRCUIT



For the Driver Memory Mirror System, proceed as follows:
  • Measure the resistance between the (P75) Driver Mirror Horizontal Driver circuit and the (C910) Driver Mirror Heater Ground circuit in the Driver Outside Rearview Mirror connector.

For the Passenger Memory Mirror System, proceed as follows:
  • Measure the resistance between the (P74) Passenger Mirror Horizontal Driver circuit and the (C917) Passenger Mirror Heater Return circuit in the Passenger Outside Rearview Mirror Module connector.


Is the resistance below 10000.0 ohms?

Yes, Driver Mirror


Yes, Passenger Mirror


No, Driver Mirror


No, Passenger Mirror