DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1544, B1600, or B1605 | Mirror Motor |
| DTC B1580, B1590, B1610, or B1620 | Mirror Position Sensor Circuit |
| DTC B1640 or B1645 | Front Mirror Heater Circuit |
| DTC B1722 | Mirror Power Fold Control Circuit |
DIAGNOSTIC CODE INDEX
Scan Tool Data Definitions
The Passenger Door Module (PDM) scan tool data definitions are a brief description of each of the related parameters displayed within the scan tool data displays for the PDM.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON/Engine OFF/Vehicle in PARK/All doors closed | |||
| Base Software P/N | Module Info. | Decimal | 16XXX |
| Base Software Suffix | Module Info. | ASCII | XX |
| Battery 1 (Low Current) | Data | Volts | 12.8 |
| Battery 2 (High Current) | Data | Volts | 12.8 |
| Calibration P/N | Module Info. | Decimal | 16XXX |
| Calibration Suffix | Module Info. | ASCII | 16XXX |
| Memory Switch | Inputs | Idle, Exit, Memory 1, Memory 2 | Idle |
| Mirror 5-Volt Reference | Outputs | On, Off | On |
| Mirror Heater | Outputs | Inactive, Active | Inactive |
| Mirror Horizontal Position | Data | Volts | Varies |
| Mirror Motor | Outputs | Idle, Left, Right, Up, Down | Idle |
| Mirror Select Switch | Inputs | Neutral, Left, Right | Neutral |
| Mirror Switch Horizontal | Inputs | Idle, Left, Right | Idle |
| Mirror Switch Vertical | Inputs | Idle, Up, Down | Idle |
| Mirror Vertical Position | Data | Volts | Varies |
| Program Software P/N | Module Info. | Decimal | 16XXX |
| Program Software Suffix | Module Info. | ASCII | XX |
Driver Door Module/Passenger Door Module
Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selections | Description |
|---|---|---|
| Output Control | Mirror Left/Right | The DDM or PDM will command the mirror left and right |
| Output Control | Mirror Up/Down | The DDM or PDM will command the mirror up and down |
| Output Control | Mirror Heat | The DDM or PDM will command the mirror heater on and off |
Driver Door Module and Passenger Door Module
Circuit Description
The driver door and passenger door modules supply battery positive voltage and ground on opposing mirror motor control circuits upon receipt of a mirror switch activation or a class 2 message commanding mirror control, memory recall or mirror tilt in reverse functions.
DTC Descriptors
This diagnostic procedure supports the following DTCs
- DTC B1544 Mirror Motors Common Circuit
- DTC B1600 Mirror Motor Vertical Circuit
- DTC B1605 Mirror Motor Horizontal Circuit
Conditions for Running the DTC
- System voltage must be between 9-16 volts.
- The mirror motor control circuits must be active.
Conditions for Setting the DTC
- If the mirror motor control circuits are switched to battery voltage and the mirror motor control circuit is shorted to ground
- If the mirror motor control circuits are switched to ground and the mirror motor control circuit is shorted to battery voltage
Action Taken When the DTC Sets
The outside rearview mirror will not operate properly on all axes.
Conditions for Clearing the DTC
When the fault is no longer present, the door module changes the current DTC to a history DTC. The door module will clear the history DTC after 50 fault-free ignition cycles, or in response to a scan tool command.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn ON the ignition, with the engine OFF. Activate the mirror switch in the up, down left and right positions. Does the mirror move properly with each activation? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the mirror from the appropriate door module. Turn ON the ignition, with the engine OFF. Probe each of the mirror motor down, right and up/left control circuit pins at the door module one at a time with a test lamp that is connected to a good ground. Did the test lamp illuminate at any of the test points? | Go to Step 7 | Go to Step 4 |
| 4 | Connect a test lamp between the mirror motor down control circuit pin and a good ground. Activate the mirror switch to the down position. Does the test lamp illuminate? | Go to Step 5 | Go to Step 8 |
| 5 | Connect a test lamp between the mirror motor right control circuit pin and a good ground. Activate the mirror switch to the right position. Does the test lamp illuminate? | Go to Step 6 | Go to Step 8 |
| 6 | Connect a test lamp between the mirror motor up/left control circuit pin and a good ground. Activate the mirror switch to the up and left positions. Does the test lamp illuminate? | Go to Step 7 | Go to Step 8 |
| 7 | Inspect for poor connection at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections . Did you find and correct the conditions? | Go to Step 10 | Go to Step 9 |
| 8 | Replace the appropriate door module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | |
| 9 | Replace the mirror. Refer to Mirror Replacement (Manual) or Mirror Replacement (Power Mirror) . Did you complete the replacement? | Go to Step 10 | |
| 10 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B1544, B1600, or B1605
The mirror horizontal and vertical position sensors are potentiometers. The driver door module (DDM) and passenger door module (PDM) provide these sensors with a 5-volt reference circuit and a low reference circuit. The DDM/PDM monitors the horizontal and vertical position sensor signal circuits which change values based on mirror position. These voltage values are used to determine mirror position and can be set into memory. When the DDM/PDM receives a memory recall request, the DDM/PDM will control the power mirror to the memory position based on the horizontal and vertical position sensor signal values.
This diagnostic procedure supports the following DTCs
- DTC B1580 Left Front Mirror Horizontal Position Sensor Circuit
- DTC B1590 Left Front Mirror Vertical Position Sensor Circuit
- DTC B1610 Right Front Mirror Horizontal Position Sensor Circuit
- DTC B1620 Right Front Mirror Vertical Position Sensor Circuit
Battery voltage must between 9-16 volts.
The horizontal and/or vertical position sensor signals are greater than 4.75 volts or less than 0.50 volt.
Memory movements on the malfunctioning axis are disabled.
When the fault is no longer present, the DDM/PDM changes the current DTC to a history DTC. The DDM/PDM will clear the history DTC after 50 fault-free ignition cycles.
Diagnostic Aids
- If DTC B1580 is set by itself, the left horizontal position sensor signal circuit may be open, shorted to ground or battery
- If DTC B1590 is set by itself, the left vertical position sensor signal circuit may be open, shorted to ground or battery
- If DTC B1610 is set by itself, the right horizontal position sensor signal circuit may be open, shorted to ground or battery
- If DTC B1620 is set by itself, the right vertical position sensor signal circuit may be open, shorted to ground or battery.
- If DTCs B1580 and B1590 are both set, the left 5-volt reference or low reference circuits may be open, shorted to ground or battery.
- If DTCs B1610 and B1620 are both set, the right 5-volt reference or low reference circuits may be open, shorted to ground or battery.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle | |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. With the scan tool, observe the mirror horizontal and vertical position parameters in the driver door module (DDM) and passenger door module (PDM) data lists. Operate both the left and right mirrors through the full range of movements. Does the scan tool indicate that the left and right mirror horizontal and vertical position parameters are within the specified range? | 0.50-4.75 V | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Is there a horizontal and vertical DTC set on the same mirror? | Go to Step 6 | Go to Step 4 | |
| 4 | Turn OFF the ignition. Disconnect the appropriate mirror. Turn ON the ignition, with the engine OFF. With a scan tool, observe the appropriate mirror position parameter. Does the scan tool indicate that the mirror position parameter is less than the specified value? | 0.50 V | Go to Step 5 | Go to Step 8 |
| 5 | Turn OFF the ignition. Connect a 3-amp fused jumper wire between the 5-volt reference circuit and the mirror position signal circuit of the appropriate mirror position sensor at the mirror harness connector. Turn ON the ignition, with the engine OFF. With a scan tool, observe the mirror position parameter. Does the scan tool indicate that the mirror position parameter is within the specified range? | 4.75-5.25 V | Go to Step 12 | Go to Step 9 |
| 6 | Turn OFF the ignition. Disconnect the appropriate mirror. Turn ON the ignition, with the engine OFF. Measure the voltage between the 5-volt reference circuit at the mirror harness connector and a good ground. Does the voltage measure within the specified range? | 4.75-5.25 V | Go to Step 7 | Go to Step 10 |
| 7 | Measure the voltage between the 5-volt reference circuit and the low reference circuit at the mirror harness connector. Does the voltage measure within the specified range? | 4.75-5.25 V | Go to Step 12 | Go to Step 11 |
| 8 | Test for a short to voltage on the mirror position signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 13 | |
| 9 | Test the mirror position signal circuit for an open, high resistance, short to ground or battery. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 13 | |
| 10 | Test the 5-volt reference circuit for an open, high resistance, short to ground or battery. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 13 | |
| 11 | Test the low reference circuit for an open, high resistance or short to battery. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 13 | |
| 12 | Inspect for poor connections at the harness connector of the power mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 14 | |
| 13 | Inspect for poor connections at the harness connector of the DDM/PDM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 15 | |
| 14 | Replace the power mirror. Refer to Mirror Replacement (Manual) or Mirror Replacement (Power Mirror) . Did you complete the replacement? | Go to Step 16 | ||
| 15 | Replace the appropriate door module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 16 | ||
| 16 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK | |
DTC B1580, B1590, B1610, or B1620
The driver door module (DDM) and passenger door module (PDM) supply battery voltage to the mirror heating element supply voltage circuit upon receipt of a class 2 message from the body control module (BCM) indicating that the rear defrost system is active. The DDM and PDM also supply a constant ground for the mirror heating elements.
This diagnostic procedure supports the following DTCs
- DTC B1640 Left Front Mirror Heater Circuit
- DTC B1645 Right Front Mirror Heater Circuit
- System voltage between 9-16 volts
- Ignition switch is in the ON position
When the DDM and PDM supply battery voltage to the mirror heating element supply voltage circuit and it is shorted to ground.
The DDM and PDM will ignore the class 2 message and stop supplying battery voltage on the shorted circuit.
When the short circuit is no longer present, the DDM/PDM will clear the current DTC and store the DTC as a history DTC. The history DTC will clear after 50 fault-free ignition cycles or in response to a scan tool command.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn ON the ignition, with the engine OFF. Activate the rear defroster switch. Does DTC B1640 or B1645 set as current in the driver door module (DDM) or passenger door module (PDM)? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
| 3 | Turn OFF the ignition. Disconnect the appropriate heated mirror. Turn ON the ignition, with the engine OFF. Activate the rear defroster switch. Does DTC B1640 or B1645 set as current in the DDM or PDM? | Go to Step 5 | Go to Step 4 |
| 4 | Inspect for poor connections at the heated mirror. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs . Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
| 6 | Replace the heated mirror. Refer to Mirror Replacement (Manual) or Mirror Replacement (Power Mirror) . Did you complete the replacement? | Go to Step 8 | |
| 7 | Replace the appropriate door module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | |
| 8 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC. Does the DTC reset? | Go to Step 2 | System OK |
DTC B1640 or B1645
The driver door module (DDM) and passenger door module (PDM) switch the mirror fold motor control circuits to battery voltage and ground in response to mirror extend or retract command.
DTC Descriptor
This diagnostic procedure supports the following DTC
DTC B1722 Mirror Power Fold Control Circuit
- Battery voltage must be between 9-16 volts.
- The ignition switch is in the ON position.
- A mirror extend or retract function must be active.
When the DDM or PDM switch the mirror fold motor control circuits to battery voltage and ground and one of the mirror fold motor control circuits are shorted to ground, shorted to battery or open.
The DDM or PDM will stop suppling battery voltage and ground to the mirror fold motor and the folding mirrors will be inoperative.
When the fault is no longer present, the door module changes the current DTC to a history DTC. The door module will clear the history DTC after 50 fault-free ignition cycles, or in response to a scan tool command.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Outside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle | |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Place the mirror select switch in the neutral/fold position. Place the mirror direction switch in both the left/extend and right/retract positions. Does DTC B1722 set as a current DTC? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections | |
| 3 | Connect a test lamp to a good ground. Backprobe both of the mirror fold motor control circuits one at a time with the test lamp. Does the test lamp illuminate at either test point? | Go to Step 6 | Go to Step 4 | |
| 4 | Connect a test lamp to battery voltage. Backprobe both of the mirror fold motor control circuits one at a time with the test lamp. Does the test lamp illuminate at either test point? | Go to Step 6 | Go to Step 5 | |
| 5 | Disconnect the power mirror. Test for continuity through the mirror fold motor and the mirror fold motor control circuits. Is there continuity? | Go to Step 7 | Go to Step 6 | |
| 6 | Inspect for poor connections at the harness connector of the power mirror. Refer to Testing for Intermittent Conditions and Poor Connections . Did you find and correct the condition? | Go to Step 10 | Go to Step 8 | |
| 7 | Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections . Did you find and correct the condition? | Go to Step 10 | Go to Step 9 | |
| 8 | Replace the appropriate power mirror. Refer to Mirror Replacement (Manual) or Mirror Replacement (Power Mirror) . Did you complete the replacement? | Go to Step 10 | ||
| 9 | Replace the appropriate door module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 10 | ||
| 10 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK | |
DTC B1722
The automatic day-night feature of the inside rearview mirror may not operate properly or become inoperative due to an intermittent short to battery voltage in the backup lighting system.
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Inside Rearview Mirror Schematics Connector End View Reference: Mirror Connector End Views | ||||
| 1 | Did you review the operation of the automatic day-night feature of the inside rearview mirror and perform the necessary inspections? | Go to Step 2 | Go to Automatic Day-Night Mirror Description and Operation | |
| 2 | Turn ON the ignition, with the engine OFF. Turn ON the automatic day-night feature of the inside rearview mirror. Cover the sensor on the inside rearview mirror back, facing the front window. Shine a bright light into the sensor on the inside rearview mirror face, facing the rear window. Does the inside rearview mirror darken? | Go to Diagnostic Aids | Go to Step 3 | |
| 3 | Turn OFF the ignition. Disconnect the harness connector of the inside rearview mirror. Measure the resistance between the ground circuit of the inside rearview mirror and a good ground. Is the resistance less than the specified value? | 3 ohms | Go to Step 4 | Go to Step 9 |
| 4 | Turn ON the ignition, with the engine OFF. Measure the voltage between the ignition voltage circuit and the ground circuit of the inside rearview mirror. Is the voltage within the specified range? | B+ | Go to Step 5 | Go to Step 10 |
| 5 | Place the transmission in PARK. Measure the voltage between the backup lamp supply voltage circuit and the ground circuit of the inside rearview mirror. Is the voltage less than the specified value? | 0.5 V | Go to Step 6 | Go to Backup Lamps Always On |
| 6 | Place the transmission in REVERSE. Measure the voltage between the backup lamp supply voltage circuit and the ground circuit of the inside rearview mirror. Is the voltage within the specified range? | B+ | Go to Step 8 | Go to Step 7 |
| 7 | Test the backup lamp supply voltage circuit of the inside rearview mirror for an open or short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Backup Lamps Inoperative | |
| 8 | Inspect for poor connections at the harness connector of the inside rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 11 | |
| 9 | Repair an open or high resistance in the ground circuit of the inside rearview mirror. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 12 | ||
| 10 | Repair an open or short to ground in the ignition voltage circuit of the inside rearview mirror. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 12 | ||
| 11 | Replace the inside rearview mirror. Refer to Mirror Replacement (Manual) or Mirror Replacement (Power Mirror) Did you complete the replacement? | Go to Step 12 | ||
| 12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | |
Automatic Day-Night Mirrors Inoperative
Diagnostic Instructions
- Perform the «Diagnostic System Check - Vehicle»(ref-277883-S07139257572008012100000) prior to using this diagnostic procedure.
- Review «Strategy Based Diagnosis»(ref-277883-S33769936482008012100000) for an overview of the diagnostic approach.
- «Diagnostic Procedure Instructions»(ref-277883-S17347055992008012100000) provides an overview of each diagnostic category.
The power mirrors will not extend or retract if either the DDM or FPDM scan tool Mirror Horizontal Position or Mirror Vertical Position parameters are greater than 2.8 volts.
Circuit/System Testing
- Ignition ON, view the scan tool Mirror Switch parameter while using the mirror control to retract and extend the folding mirrors. The parameter should change between Retract and Extend. If not the specified value, replace the DDM.
- Ignition OFF, disconnect the harness connector at the applicable door module.
- Test for less than 2 ohms of resistance between the folding mirror control circuits. If greater than the specified value, test the control circuits for an open/high resistance. If all circuits test normal, test or replace the applicable outside rearview mirror.
- If all circuits test normal, replace the applicable door module.
Component Testing
- Install a 10A fused jumper wire between the applicable control circuit and 12 volts. Momentarily install a jumper wire between the opposite control circuit and ground. The mirror should fold or retract. If the function does not perform as specified, replace the applicable outside rearview mirror.
- Reverse the jumper wires. The mirror should fold or retract. If the function does not perform as specified, replace the applicable outside rearview mirror.