Pinpoint Test Y: The PRNDL Indicator is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test Y: The PRNDL Indicator is Never/Always On
Normal Operation
The Instrument Panel Cluster (IPC) receives the transmission range status, the select shift status (if equipped) and the range select status (if equipped) from the PCM (gasoline engines) or from the Transmission Control Module (TCM) (diesel engine) over the High Speed Controller Area Network (HS-CAN) communication bus. The IPC also uses a park detect switch (part of the brake shift interlock actuator) to signal the IPC that the shift lever is fully seated in the PARK (P) position. The IPC compares the park detect switch input with the transmission range status sent from the PCM or the TCM and looks for vehicle speed above 16 km/h (10 mph). The IPC provides a reference voltage to the brake shift interlock. When the gearshift is in PARK (P), the brake shift indicator routes the reference voltage to ground pulling the circuit low to the IPC. When the gearshift is moved out of PARK (P), the brake shift interlock opens the ground, sending the reference voltage high.
NOTE: On the base IPC, range select and select shift indication uses the same display. On the optional IPC, the range select and select shift are separate displays.
When in select shift mode (if equipped), the select shift indication is illuminated along with the PRNDM21 display. For example, when M is selected and select shift is selected, the PRNM21 illuminates the M and the select shift display illuminates 1-6 (base IPC or M1-M6 (optional IPC) simultaneously.
When in range select mode (if equipped), the range select indication is illuminated along with the PRNDM21 display. For example, when range select is selected, the PRNM21 illuminates the D and the range select shift display illuminates 1-6 simultaneously.
If the transmission range information is missing from the PCM or the TCM, the IPC sets DTC U0100:00 (PCM) or DTC U0101:00 (TCM).
NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms may be an inoperative speedometer, tachometer, temperature gauge or odometer. If DTC U0101:00 sets in the IPC, other observable symptoms may be the powertrain malfunction (wrench) warning indicator always on.
- DTC P1706:00 (High Vehicle Speed Observed In Park: No Sub Type Information) - a continuous memory DTC that sets if the IPC receives a short to ground on the park detect switch input circuit, pulling the circuit low with a Vehicle Speed Sensor (VSS) input over 16 km/h (10 mph) for greater than 5 seconds (indicating that the vehicle is in park and in motion).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Brake shift interlock actuator
- PCM concern
- TCM concern
- IPC
PINPOINT TEST Y: 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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Y1 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.
- Ignition OFF.
- Observe the PRNDL display immediately after turning the key off.
- Does the PRNDL display the different ranges according to the selector lever position then display P for approximately 5 seconds when the key is turned off?
Yes
The system is functioning correctly at this time.
No
GO to Y2.
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Y2 CARRY OUT THE IPC PRNDL ACTIVE COMMAND USING THE SCAN TOOL
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger.
- Select the IPC PRNDL indicator (GEAR_DISP) active command. Command the PRNDL indicator through the range selections while observing the PRNDL and select shift (if equipped) displays.
- Do the PRNDL and select shift (if equipped) display area displays match the command?
Yes
GO to Y3.
No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.
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Y3 RETRIEVE AND RECORD THE IPC DTCs FROM THE SELF-TEST
- Check for recorded IPC DTCs from the self-test.
- Are any DTCs recorded?
Yes
For DTC P1706:00, GO to Y4. For DTC U0100:00, GO to Pinpoint Test BA. For DTC U0101:00, GO to Pinpoint Test BB. For all other DTCs, REFER to DTC Charts. Pinpoint Tests BA: DTC U0100:00 Pinpoint Tests BB: DTC U0101:00
No
For gasoline engines, GO to Y5. For diesel engine, GO to Y6.
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Y4 CONFIRM DTC P1706:00 IS STILL PRESENT
- CLEAR the DTCs. DRIVE the vehicle above 16 km/h (10 mph) for more than 5 seconds. REPEAT the self-test.
- Is DTC P1706:00 present?
Yes
GO to Y7.
No
The PRNDL is operating correctly at this time. The fault may be caused by an intermittent concern with the park detect input to the IPC.
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Y5 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.
No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.
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Y6 RETRIEVE AND RECORD THE DTCs FROM THE TCM SELF-TEST
- Check for recorded TCM DTCs from the self-test.
- Are any DTCs recorded?
Yes
REFER to Automatic Transaxle/Transmission - TorqShift(R) Testing and Inspection.
No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.
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Y7 CHECK THE BRAKE SHIFT INTERLOCK OPERATION
- Apply the park brake and shift the transmission into NEUTRAL (N).
- Ignition OFF.
- Disconnect: Brake Shift Interlock C2008.
- Clear the DTCs.
- Disengage the park brake and drive the vehicle above 16 km/h (10 mph) for more than 5 seconds.
- Retrieve the IPC continuous memory DTCs.
- Is DTC P1706:00 still present?
Yes
GO to Y8.
No
INSTALL a new brake shift interlock actuator. REFER to Automatic Transaxle/Transmission External Controls Service and Repair. TEST the system for normal operation.
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Y8 CHECK THE PARK DETECT INPUT CIRCUIT FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Disconnect: IPC C220.
- Measure the resistance between the IPC C220-20, circuit CET52 (GN), harness side and the brake shift interlock C2008-2, circuit CET52 (GN), harness side; and between the IPC C220-20, circuit CET52 (GN), harness side and ground.
- Is the resistance less than 5 ohms between the IPC and the brake shift interlock, and greater than 10,000 ohms between the IPC and ground?
Yes
GO to Y9.
No
REPAIR circuit CET52 (GN) for an open or short to ground. REPEAT the self-test. CLEAR the DTCs.
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Y9 CHECK FOR CORRECT IPC OPERATION
- Disconnect the IPC connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IPC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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