Pinpoint Tests AJ: The PRNDL Indicator is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Test AJ: The PRNDL Indicator is Never/Always On
Refer to Wiring Diagram Set 60 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Instrument Cluster for schematic and connector information. Diagrams By Number
Normal Operation
The Instrument Panel Cluster (IPC) receives the transaxle range status and vehicle speed data from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. On hybrid vehicles, the vehicle speed data is sent to the IPC from the Transmission Control Module (TCM) over the HS-CAN communication bus.
For all ranges other than PARK (P), the IPC displays the selected gear matching the input from the PCM.
For PARK (P), the IPC uses a park detect switch (part of the brake shift interlock) to signal the IPC that the shift lever is fully seated in the PARK position. The IPC compares the park detect switch input with the transaxle range status sent from the PCM. The IPC provides a reference voltage to the brake shift interlock on the park detect input circuit. When the gearshift is in PARK (P), the brake shift indicator routes the reference voltage to ground, pulling the circuit low. When the gearshift is moved out of PARK (P), the brake shift interlock opens the ground sending the reference voltage high.
If the transaxle range status information is missing from the PCM for less than 5 seconds, the PRNDL displays the last selected range based upon the last good known message. If the transaxle range status information is missing from the PCM for 5 seconds or more, the IPC sets DTC U0100:00 and the PRNDL display is blank. If the park detect input is open, the PARK (P) display is blank when the transaxle is in PARK (P) but all other ranges are still displayed according to the selected range status. If the park detect input is shorted to ground and the messaged input indicates any range other than park, the PARK (P) display is blank once a fault is detected by the IPC (all other ranges are still displayed according to the selected range status).
NOTE: If DTC U0100:00 is set in the IPC, other observable symptoms may be an inoperative speedometer, tachometer, temperature gauge or odometer.
- DTC P1706:00 (High Vehicle Speed Observed in Park: No Sub-Type Information) (non-hybrid) - a continuous memory DTC that sets if the IPC detects a short to ground on the park detect input circuit with a Vehicle Speed Sensor (VSS) input over 16 km/h (10 mph), indicating that the vehicle is in motion.
- DTC P1706:62 (High Vehicle Speed Observed in Park: Signal Compare Failure) (hybrid) - a continuous memory DTC that sets if the IPC detects a short to ground on the park detect input circuit with a Vehicle Speed Sensor (VSS) input over 16 km/h (10 mph), indicating that the vehicle is in motion.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Park detect switch (part of the selector lever)
- PCM
- IPC
PINPOINT TEST AJ: THE PRNDL INDICATOR IS NEVER/ALWAYS ON
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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AJ1 CHECK THE PRNDL DISPLAY PARK OPERATION
- Ignition ON.
- Shift the selector lever through the different gear positions while observing the PRNDL display.
- Place the selector lever in the PARK (P) position.
- Observe the PRNDL display.
- Does the PRNDL display the different ranges according to the selector lever position including PARK (P)?
Yes
The system is functioning correctly at this time.
No
GO to AJ2.
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AJ2 RETRIEVE THE RECORD DTCs FROM THE IPC SELF-TEST
- Check for recorded DTCs from the IPC self-test.
- Are any DTCs recorded?
Yes
For all DTCs, CLEAR the DTCs. DRIVE the vehicle above 16 km/h (10 mph) for more than 5 seconds. REPEAT the self-test.
If DTC U0100:00 is present, GO to Pinpoint Test BF. Pinpoint Tests BF: DTC U0100:00
If DTC P1706:00 (non-hybrid) or P1706:62 (hybrid) is present, GO to AJ5.
No
GO to AJ3.
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AJ3 RETRIEVE AND RECORD THE DTCs FROM THE PCM KOEO SELF-TEST
- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any PCM DTCs recorded?
Yes
REFER to Computers and Control Systems Information.
No
GO to AJ4.
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AJ4 CHECK THE PARK DETECT INPUT TO THE IPC
- Ignition OFF.
- Disconnect: Selector Lever C3233 .
- Install a fused jumper wire between the selector lever C3233-3, circuit CET52 (GN), harness side and ground.
- Ignition ON.
- Monitor the PRNDL indicator with the jumper wire installed and with the jumper wire removed.
- Does the PRNDL display P with the jumper wire installed and blank with the jumper wire removed?
Yes
INSTALL a new selector lever. REFER to Service and Repair.
TEST the system for normal operation.
No
GO to AJ5.
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AJ5 CHECK THE PARK DETECT INPUT CIRCUIT FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Disconnect: IPC C220 .
- Measure the resistance between the IPC C220-7, circuit CET52 (GN), harness side and the selector lever C3233-3, circuit CET52 (GN), harness side; and between the IPC C220-7, circuit CET52 (GN), harness side and ground.
- Is the resistance less than 5 ohms between the IPC and the selector lever, and greater than 10,000 ohms between the IPC and ground?
Yes
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.
No
REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.
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