Rear View Mirror: Overview Ford Mustang V рестайлинг

Normal Operation

The exterior mirror control switch receives power from the Smart Junction Box (SJB) through circuit SBP12 (GN/RD) and ground through circuit GD133(BK). The exterior mirror control switch uses circuit CPM23(GY) as the common circuit for both exterior mirror up/down and right/left movement.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Exterior mirror control switch

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1. A1 CHECK FOR VOLTAGE TO EXTERIOR MIRROR CONTROL SWITCH Ignition OFF. Disconnect: Exterior Mirror Control Switch C527. Ignition ON. Measure the voltage between exterior mirror control switch C527-3, circuit SBP12 (GN/RD), harness side and ground. Is the voltage greater than 10 volts? Yes: GO to A2 . No: VERIFY that SJB fuse 12 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-395056) service information to identify the possible causes of the circuit short. TEST the system for normal operation.
2. A2 CHECK FOR GROUND TO EXTERIOR MIRROR CONTROL SWITCH Ignition OFF. Measure the resistance between exterior mirror control switch C527-1, circuit GD133 (BK), harness side and ground. Is the resistance less than 5 ohms? Yes: GO to A3 . No: REPAIR the circuit. TEST the system for normal operation.
3. A3 CHECK COMMON CIRCUIT FOR A SHORT TO VOLTAGE Ignition ON. Measure the voltage between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and ground. Is any voltage present? Yes: REPAIR the circuit. TEST the system for normal operation. No: GO to A4 .
4. A4 CHECK COMMON CIRCUIT FOR AN OPEN OR A SHORT TO GROUND Ignition OFF. Disconnect: LH Exterior Mirror C516. Measure the resistance between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and ground; and between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and LH exterior mirror C516-2, circuit CPM23 (GY), harness side. Is the resistance greater than 10,000 ohms between the exterior mirror control switch connector and ground and less than 5 ohms between the exterior mirror control switch connector and the exterior mirror connector? Yes: INSTALL a new exterior mirror control switch. REFER to «EXTERIOR MIRROR CONTROL SWITCH»(ref-439850-S33021170202011120900000) in this service information. TEST the system for normal operation. No: REPAIR the circuit. TEST the system for normal operation.

The exterior mirror control switch uses circuit CPM23 (GY) as the common circuit for both exterior mirror up/down and right/left movement.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Exterior mirror control switch
3. Exterior mirror motor
4. Exterior mirror

Scheme 5

1. B1 CHECK THE LH EXTERIOR MIRROR Set the exterior mirror control switch to the LH mirror position. Use the exterior mirror control switch to operate the LH exterior mirror. Does the LH exterior mirror operate? Yes: GO to B2 . No: GO to B4 .
2. B2 CHECK THE EXTERIOR MIRROR CONTROL SWITCH Ignition OFF. Disconnect: Exterior Mirror Control Switch C527. Carry out the Exterior Mirror Control Switch Component Test. Refer to «EXTERIOR REAR VIEW MIRROR SWITCH»(ref-418195-S04470244492011090100000) article for component testing. Did the exterior mirror control switch pass the component test? Yes: GO to B3 . No: INSTALL a new exterior mirror control switch. REFER to «EXTERIOR MIRROR CONTROL SWITCH»(ref-439850-S33021170202011120900000) in this service information. TEST the system for normal operation.
3. B3 CHECK COMMON CIRCUIT FOR AN OPEN Disconnect: RH Exterior Mirror C622. Measure the resistance between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and RH exterior mirror C622-2, circuit CPM23 (GY), harness side. Is the resistance less than 5 ohms? Yes: CHECK the RH exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new exterior mirror. REFER to «EXTERIOR MIRROR»(ref-439850-S36292656712011120900000) in this service information. If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to «EXTERIOR MIRROR MOTOR»(ref-439850-S14860844522011120900000) in this service information. TEST the system for normal operation. No: REPAIR the circuit. TEST the system for normal operation.
4. B4 CHECK THE EXTERIOR MIRROR CONTROL SWITCH Ignition OFF. Disconnect: Exterior Mirror Control Switch C527. Carry out the Exterior Mirror Control Switch Component Test. Refer to «EXTERIOR REAR VIEW MIRROR SWITCH»(ref-418195-S04470244492011090100000) article for component testing. Did the exterior mirror control switch pass the component test? Yes: GO to B5 . No: INSTALL a new exterior mirror control switch. REFER to «EXTERIOR MIRROR CONTROL SWITCH»(ref-439850-S33021170202011120900000) in this service information. TEST the system for normal operation.
5. B5 CHECK COMMON CIRCUIT FOR AN OPEN Disconnect: LH Exterior Mirror C516. Measure the resistance between exterior mirror control switch C527-6, circuit CPM23 (GY), harness side and LH exterior mirror C516-2, circuit CPM23 (GY), harness side. Is the resistance less than 5 ohms? Yes: CHECK the LH exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new exterior mirror. REFER to «EXTERIOR MIRROR»(ref-439850-S36292656712011120900000) in this service information. If the jumper harness is OK, INSTALL a new exterior mirror motor. REFER to «EXTERIOR MIRROR MOTOR»(ref-439850-S14860844522011120900000) in this service information. TEST the system for normal operation. No: REPAIR the circuit. TEST the system for normal operation.

The exterior mirror control switch controls the LH exterior mirror movement by switching voltage and ground to circuits CPM17 (BU/GN), CPM16 (BN/BU) and CPM23 (GY). The exterior mirror switch controls the RH exterior mirror movement by switching voltage and ground to circuits CPM21 (YE/VT), CPM20 (BN/WH) and CPM23 (GY).

Mirror Movement

1. When the LH/RH exterior mirror motor receives power through circuit CPM17 (BU/GN) and ground through circuit CPM23 (GY), the LH/RH exterior mirror will operate upward.
2. When the LH/RH exterior mirror motor receives ground through circuit CPM17 (BU/GN) and power through circuit CPM23 (GY), the LH/RH exterior mirror will operate downward.
3. When the LH/RH exterior mirror motor receives power through circuit CPM16 (BN/BU) and CPM20 (BN/WH) and ground through circuit CPM23 (GY), the LH/RH exterior mirror will operate left.
4. When the LH/RH exterior mirror motor receives ground through circuit CPM16 (BN/BU) and CPM20 (BN/WH) and power through circuit CPM23 (GY), the LH/RH exterior mirror will operate right. This pinpoint test is intended to diagnose the following
5. Wiring, terminals or connectors
6. Exterior mirror control switch
7. Exterior mirror motor
8. Exterior mirror

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1. C1 CHECK THE EXTERIOR MIRROR CONTROL CIRCUITS FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: Exterior Mirror Control Switch C527. Ignition ON. Measure the voltage between ground and exterior mirror control switch: C527-2, circuit CPM21 (YE/VT), harness side. C527-5, circuit CPM17 (BU/GN), harness side. C527-6, circuit CPM23 (GY), harness side. C527-7, circuit CPM20 (BN/WH), harness side. C527-8, circuit CPM16 (BN/BU), harness side. Is any voltage present? Yes: REPAIR the circuit(s). TEST the system for normal operation. No GO to C2 .
2. C2 CHECK THE EXTERIOR MIRROR CONTROL CIRCUITS FOR A SHORT TO GROUND Ignition OFF. Disconnect: Exterior Mirror C516 (LH) or C622 (RH). Measure the resistance between ground and exterior mirror control switch: C527-2, circuit CPM21 (YE/VT), harness side. C527-5, circuit CPM17 (BU/GN), harness side. C527-6, circuit CPM23 (GY), harness side. C527-7, circuit CPM20 (BN/WH), harness side. C527-8, circuit CPM16 (BN/BU), harness side. Are the resistances greater than 10,000 ohms? Yes: GO to C3 . No: REPAIR the circuit(s). TEST the system for normal operation.
3. C3 CHECK THE EXTERIOR MIRROR CONTROL CIRCUITS FOR AN OPEN NOTE: LH mirror only. Measure the resistance between exterior mirror control switch: C527-6, circuit CPM23 (GY), harness side and LH exterior mirror C516-2, circuit CPM23 (GY), harness side. C527-8, circuit CPM16 (BN/BU), harness side and LH exterior mirror C516-3, circuit CPM16 (BN/BU), harness side. C527-5, circuit CPM17 (BU/GN), harness side and LH exterior mirror C516-1, circuit CPM17 (BU/GN), harness side. NOTE: RH mirror only. Measure the resistance between exterior mirror control switch: C527-6, circuit CPM23 (GY), harness side and RH exterior mirror C622-2, circuit CPM23 (GY), harness side. C527-7, circuit CPM20 (BN/WH), harness side and RH exterior mirror C622-3, circuit CPM20 (BN/WH), harness side. C527-2, circuit CPM21 (YE/VT), harness side and RH exterior mirror C622-1, circuit CPM21 (YE/VT), harness side. Are the resistances less than 5 ohms? Yes: CHECK the LH or RH exterior mirror jumper harness between the vehicle harness and the exterior mirror motor for open or shorted circuits and damaged or pushed-out pins. If the jumper harness is not OK, REPAIR the jumper harness. If the jumper harness cannot be repaired, INSTALL a new LH or RH exterior mirror. REFER to «EXTERIOR MIRROR»(ref-439850-S36292656712011120900000) in this service information. If the jumper harness is OK, INSTALL a new LH or RH exterior mirror motor. REFER to «EXTERIOR MIRROR MOTOR»(ref-439850-S14860844522011120900000) in this service information. TEST the system for normal operation. No: REPAIR the circuit(s). TEST the system for normal operation.

Under normal operation, the interior auto-dimming mirror receives voltage from Smart Junction Box (SJB) fuse 41 (15A) through circuit CBP41 (BU) and ground from circuit GD139 (BK/YE). When the selector lever is placed in REVERSE, voltage is sent to circuit CAT03 (GY/BN) from the Body Control Module B (BCM-B) and the interior auto-dimming mirror will turn the dimming feature off. There are 2 photoelectric sensors: one in front of the interior rear view mirror and one mounted on the glass side of the mirror. If the sensors are blocked, the interior mirror auto-dimming feature might not work correctly. Always verify both sensors are not physically blocked before attempting to diagnose auto-dimming mirror concerns.

1. DTC P0801: 11 (Reverse Inhibit Control Circuit: Short to Ground) - When the BCM-B senses a short to ground on the reverse inhibit control circuit, this DTC will set.
2. DTC P0801: 12 (Reverse Inhibit Control Circuit: Short to Battery) - When the BCM-B senses a short to voltage on the reverse inhibit control circuit, this DTC will set.
3. DTC P0801: 13 (Reverse Inhibit Control Circuit: Open) - When the BCM-B senses an open on the reverse inhibit control circuit, this DTC will set. This pinpoint test is intended to diagnose the following
4. Fuse
5. Wiring, terminals or connectors
6. BCM-B
7. Interior auto-dimming mirror

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1. D1 RETRIEVE THE DTCs FROM THE BCM-B Use the recorded BCM-B DTCs from the continuous and on-demand self tests. Are DTCs retrieved? Yes: If DTC P0801: 11, GO to D11 . If DTC P0801: 12, GO to D12 . If DTC P0801: 13, GO to D10 . No: GO to D2 .
2. D2 VERIFY THE FORWARD AND REARWARD FACING SENSORS ARE NOT BLOCKED Visually verify the forward and rearward facing sensors are not blocked. Sources of blockage can include: stickers, window decals or tags. fold-down screens for TVs or DVD players. non-OEM window tinting. Were either of the sensors blocked? Yes: If possible, REMOVE the blockage. TEST the system for normal operation. If it is not possible to remove the blockage, REVIEW the operation of the interior auto-dimming mirror with the customer. No GO to D3 .
3. D3 CHECK OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - DAYLIGHT CONDITIONS Ignition ON. Use a bright lamp to illuminate the forward facing sensor and the rearward facing sensor. The mirror should adjust to a high reflectance mode (mirror will be clear). Does the mirror adjust to the high reflectance (clear) mode? Yes: GO to D4 . No: INSTALL a new interior auto-dimming mirror. REFER to «INTERIOR REAR VIEW MIRROR - AUTO-DIMMING»(ref-439850-S36432382082011120900000) in this service information. TEST the system for normal operation.
4. D4 CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - NIGHTTIME CONDITIONS WITHOUT GLARE Ignition ON. NOTE: Covering the sensor with a finger or hand is not adequate. Simulate nighttime conditions without glare: cover the forward sensor with black electrical tape or other dark material. cover the rearward facing sensor. The mirror should adjust to the high reflectance mode. Did the mirror adjust to the high reflectance (clear) mode? Yes: GO to D5 . No: GO to D7 .
5. D5 CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - NIGHTTIME CONDITIONS WITH GLARE Ignition ON. NOTE: Covering the sensor with a finger or hand is not adequate. Simulate nighttime conditions with glare: cover the forward-facing sensor with black electrical tape or other dark material. illuminate the rearward-facing sensor. The mirror should darken to a lower reflectance mode. Did the mirror darken to a lower reflectance (darker) mode? Yes: GO to D6 . No GO to D7 .
6. D6 CHECK THE OPERATION OF THE INTERIOR AUTO-DIMMING MIRROR - NIGHTTIME CONDITIONS WITH VEHICLE IN REVERSE Ignition ON. NOTE: Covering the sensor with a finger or hand is not adequate. Simulate nighttime conditions with glare: cover the forward sensor with black electrical tape or other dark material. illuminate the rearward facing sensor. Select REVERSE. Did the mirror adjust to a high reflectance (clear) mode? Yes: The system is operating correctly at this time. REVIEW operation of the interior auto-dimming interior mirror feature with the customer. No: GO to D7 .
7. D7 CHECK CIRCUIT CBP41 (BU) FOR VOLTAGE Ignition OFF. Disconnect: Interior Mirror C9012 (without video display) /C9039 (with video display). Ignition ON. Without video display: Measure the voltage between interior auto-dimming mirror C9012-1, circuit CBP41 (BU), harness side and ground. With video display: Measure the voltage between interior auto-dimming mirror C9039-1, circuit CBP41 (BU), harness side and ground. Is the voltage greater than 10 volts? Yes: GO to D8 . No: VERIFY SJB fuse 41 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-395056) service information to identify the possible causes of the circuit short. TEST the system for normal operation.
8. D8 CHECK CIRCUIT GD139 (BK/YE) FOR AN OPEN Ignition OFF. Without video display: Measure the resistance between interior auto-dimming mirror C9012-10, circuit GD139 (BK/YE), harness side and ground. With video display: Measure the resistance between interior auto-dimming mirror C9039-3, circuit GD139 (BK/YE), harness side and ground. Is the resistance less than 10 ohms? Yes: GO to D9 . No: REPAIR the circuit. TEST the system for normal operation.
9. D9 CHECK THE REVERSE INHIBIT CONTROL CIRCUIT FOR VOLTAGE Ignition ON. Select REVERSE. Without video display: Measure the voltage between interior auto-dimming mirror C9012-3, circuit CAT03 (GY/BN), harness side and ground. With video display: Measure the voltage between interior auto-dimming mirror C9039-2, circuit CAT03 (GY/BN), harness side and ground. Is the voltage greater than 10 volts? Yes: INSTALL a new interior auto-dimming mirror. REFER to «INTERIOR REAR VIEW MIRROR - AUTO-DIMMING»(ref-439850-S36432382082011120900000) in this service information. TEST the system for normal operation. No: GO to D10 .
10. D10 CHECK THE REVERSE INHIBIT CONTROL CIRCUIT FOR AN OPEN Ignition OFF. Disconnect: Interior Mirror C9012 (without video display)/C9039 (with video display). Disconnect: BCM-B C4368a. Without video display: Measure the resistance between BCM-B C4368a-6, circuit CAT03 (GY/BN), harness side and interior auto-dimming mirror C9012-3, circuit CAT03 (GY/BN), harness side. With video display: Measure the resistance between BCM-B C4368a-6, circuit CAT03 (GY/BN), harness side and interior auto-dimming mirror C9039-2, circuit CAT03 (GY/BN), harness side. Is the resistance less than 5 ohms? Yes: GO to D13 . No: REPAIR the circuit. TEST the system for normal operation.
11. D11 CHECK THE REVERSE INHIBIT CONTROL CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Disconnect: BCM-B C4368a. Measure the resistance between BCM-B C4368a-6, circuit CAT03 (GY/BN), harness side and ground. Is the resistance less than 5 ohms? Yes: REPAIR the circuit. TEST the system for normal operation. No: GO to D13 .
12. D12 CHECK THE REVERSE INHIBIT CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: BCM-B C4368a. Ignition ON. Measure the voltage between BCM-B C4368a-6, circuit CAT03 (GY/BN), harness side and ground. Is the voltage greater than 10 volts? Yes: REPAIR the circuit. TEST the system for normal operation. No: GO to D13 .
13. D13 CHECK FOR CORRECT BCM-B OPERATION Disconnect all BCM-B connectors. Check for: corrosion. pushed-out pins. Connect all BCM-B connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new BCM-B . REFER to «MULTIFUNCTION ELECTRONIC MODULE»(ref-439796) article. No: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.