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Acura RL. Manual - part 847

DTC 85: F-CAN COMMUNICATION FAILURE

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch OFF, then turn the ignition switch ON (II) again.

4. Wait about 5 seconds.

5. Check for DTCs with the HDS.

Is DTC 85 indicated?

YES - Go to step 6.

NO - The system is OK at this time.

6. Test-drive the vehicle.

Does the speedometer work?

YES - Go to step 10.

NO - Go to step 7.

7. Turn the ignition switch OFF.

8. Disconnect the TPMS control unit connector B (20P).

9. Test-drive the vehicle.

Does the speedometer work?

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary,
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck.

NO - Turn the ignition switch OFF, and reconnect all connectors, then check and troubleshoot the fuel
and emissions systems (see GENERAL TROUBLESHOOTING INFORMATION ).

10. Turn the ignition switch OFF.

11. Short the SCS line with the HDS.

12. Disconnect PCM connector E (31P).

13. Disconnect the TPMS control unit connector B (20P).

14. Check for continuity between the TPMS control unit connector B (20P) terminals and the PCM

connector E (31P) terminals individually (see CONTINUITY CHART).

CONTINUITY CHART

NOTE:

Check the fuel and emission systems DTCs with the HDS, and troubleshoot
the PCM and F-CAN communication errors first (see GENERAL
TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

Friday, June 05, 2009 3:22:24 PM

Page 41

Fig. 32: Checking Continuity Between TPMS Control Unit Connector B (20P) Terminals And
PCM Connector E (31P) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

NO - Repair open in the wire between the TPMS control unit and the PCM.

DTC 91,93,95,97: TIRE PRESSURE SENSOR INTERNAL ERROR

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch OFF, then turn it ON (II) again.

4. Wait about 1 minute.

5. Check for DTCs with the HDS.

DTC TIRE LOCATION CHART

Is DTC 91, 93, 95 or 97 indicated?

YES - Replace the appropriate tire pressure sensor (see TIRE PRESSURE SENSOR

Terminal name TPMS control unit terminal PCM E terminal

CANL

No. 10

No. 26

CANH

No. 19

No. 15

NOTE:

The tire pressure sensor of the appropriate wheel is shown.

DTC Tire location

Right-front

Left-front

Right-rear

Left-rear

2007 Acura RL

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

Friday, June 05, 2009 3:22:24 PM

Page 42

REPLACEMENT ).

NO - The system is OK at this time.

SYMPTOM TROUBLESHOOTING

LOW TIRE PRESSURE INDICATOR DOES NOT COME ON, AND NO DTCS ARE STORED ('05-
07 MODELS)

1. Turn the ignition switch ON (II).

2. Check the low tire pressure indicator for several seconds when the ignition switch is turned ON (II).

Did the indicator come on and then go off?

YES - Go to step 2.

NO - Do the troubleshooting for the gauge control module (see COMPONENT LOCATION
INDEX ). If necessary, substitute a known-good gauge control module (see GAUGE CONTROL
MODULE REPLACEMENT ), and recheck.

3. Lower a tires pressure until the low tire pressure indicator turns on.

Does the indicator come on when the tire pressure is below 168 kPa,(1.7 kgf/cm

, 24 psi)?

YES - The system is OK at this time.

NO - Go to step 4.

4. Connect the HDS, and read the pressure of the low tire(s). If UNDEFINED is shown on the HDS, turn

the ignition switch OFF, rotate the appropriate tire 1/4 turn, then turn the ignition switch ON (II), and
try again. If there is no response, repeat the procedure in the previous sentence until a NORMAL is
shown.

Is the tire pressure shown on the HDS monitor within 40 kPa (0.4 kgf/cm

, 6 psi) of the actual tire

pressure?

YES - Go to step 5.

NO - Replace the tire pressure sensor (see TIRE PRESSURE SENSOR REPLACEMENT ).

5. Turn the ignition switch OFF.

6. Disconnect TPMS control unit connector A (14P).

NOTE:

Check for gauge DTCs with the HDS (see GENERAL TROUBLESHOOTING
INFORMATION ). If gauge DTCs are stored, troubleshoot those DTCs first

NOTE:

If 5 minutes has passed since the ignition switch has been turned on,
turn the ignition switch off and wait 2 minutes, then turn back on again.

2007 Acura RL

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

Friday, June 05, 2009 3:22:24 PM

Page 43

7. Measure the voltage between TPMS control unit connector A (14P) terminal No. 3 and No. 5.

Fig. 33: Measuring Voltage Between TPMS Control Unit Connector A (14P) Terminal No. 3
And No. 5
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Repair short to power in the wire between the TPMS control unit and the No. 21 (10A) fuse in
the under-dash fuse/relay box.

NO - Check for loose terminals and poor connections at the TPMS control unit. If necessary,
substitute a known-good TPMS control unit (see TPMS INDICATOR OR TIRE(S) INDICATOR
(S) DOES NOT GO OFF, AND NO DTCS ARE STORED ), and recheck.

LOW TIRE PRESSURE INDICATOR DOES NOT COME ON, AND NO DTCS ARE STORED ('08
MODEL)

1. Turn the ignition switch ON (II), and watch the low pressure indicator.

Does the low pressure indicator come on for 2 seconds?

YES - Go to step 2.

NO - Do the self-diagnostic function for the gauge control module (see SELF-DIAGNOSTIC
FUNCTION ). If necessary, substitute a known-good gauge control module (see GAUGE
CONTROL MODULE REPLACEMENT ), and recheck.

2. Lower the pressure in any tire until the low tire pressure indicator comes on.

Does the indicator come on when the pressure drops below: 168 kPa (1.7 kgf/cm

, 24 psi) or less?

YES - The system is OK at this time.

NO - Go to step 3.

3. Connect the HDS, and read the pressure of the low tire(s). If UNDEFINED is shown on the HDS, turn

2007 Acura RL

2005-08 SUSPENSION TPMS (Tire Pressure Monitoring System) - RL

Friday, June 05, 2009 3:22:24 PM

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Content .. 845 846 847 848 ..