Pinpoint Test P: The Delayed Accessory is Inoperative
Glass, Frames and Mechanisms
Pinpoint Test P: The Delayed Accessory is Inoperative
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. [1][2]Diagrams By Number
Normal Operation
The accessory delay relay is located in the Smart Junction Box (SJB). When the ignition is turned ON, the SJB (Smart Junction Box) activates the accessory delay relay, which provides power to the master window control switch. The delayed accessory feature remains active for 10 minutes after the ignition is turned OFF or until either front door is opened.
- DTC B1302 (Accessory Delay Relay Coil Circuit Failure)- sets when the SJB (Smart Junction Box) detects an open or short to ground on the accessory delay relay control circuit.
- DTC B1304 (Accessory Delay Relay Coil Circuit Short to Battery)- Sets when the SJB (Smart Junction Box) detects a short to voltage on the accessory delay relay control circuit.
This pinpoint test is intended to diagnose the following:
- Circuit breaker
- Accessory delay relay
- Wiring, terminals or connectors
- SJB (Smart Junction Box)
PINPOINT TEST P : THE DELAYED ACCESSORY IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
P1 CHECK THE DOOR AJAR SWITCH OPERATION
- Open and close the front doors. Verify the interior lights turn on when the doors are open, and off when the doors are closed.
Do the interior lights operate normally?
Yes
GO to P2.
No
REFER to Lighting and Horns to diagnose the interior lighting and door ajar switches.
P2 CHECK THE ACCESSORY DELAY RELAY
- Disconnect: Accessory Delay Relay.
- Carry out the accessory delay relay component test.
Did the delayed accessory relay pass the component test?
Yes
VERIFY SJB (Smart Junction Box) fuse 41 (15A) (MKZ only) and circuit breaker 47 (30A) are OK. If OK, GO to P3.
If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. REPAIR the circuit. TEST the system for normal operation. [1][2]Diagrams By Number
No
INSTALL a new accessory delay relay. TEST the system for normal operation.
P3 CHECK THE MASTER WINDOW CONTROL SWITCH POWER CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) C2280D.
- Disconnect: Master Window Control Switch C537A (Fusion, if RH front window is not equipped with one-touch up/down) or C535B (MKZ and/or Fusion if RH front window is equipped with one-touch up/down).
- Measure the resistance between master window control switch C537A-2 or C535B-3 , circuit CBP47 (GN/BU), harness side and SJB (Smart Junction Box) C2280D-32, circuit CBP47 (GN/BU), harness side.
Is the resistance less than 5 ohms?
Yes
GO to P4.
No
REPAIR the circuit. TEST the system for normal operation.
P4 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- Disconnect all SJB (Smart Junction Box) connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all SJB (Smart Junction Box) 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 SJB (Smart Junction Box). TEST the system for normal operation.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.