Honda ACCORD HYBRID 2005 Service Manual page 383

DTC P1128: MAP Sensor Signal Lower Than
Expected
1. Turn the ignition switch ON (II).
2. Check the MAP SENSOR in the DATA LIST w i t h the
HDS.
Is there less than 54.1 kPa (16.0 in.Hg, 406 mmHg)
or 1.61 V held for more than 5 seconds?
Y E S — G o t o step 6.
N O — G o t o step 3.
3. Clear the DTC w i t h the HDS.
4. Start the engine. Hold the engine speed at
3,000 r p m w i t h o u t load (in Park or neutral) until the
radiator fan comes o n , then let it idle.
5. Test-drive under these conditions:
• Engine coolant temperature above 158 °F (70 °C)
• Engine speed between 1,400 and 6,500 r p m
• Transmission in D position
• Vehicle speed accelerated f r o m 16 m p h (25 km/h)
to 31 m p h (50 km/h) under half throttle
6. M o n i t o r the OBD STATUS for DTC P1128 in the
DTCs M E N U w i t h the HDS.
Does the screen indicate FAILED?
Y E S — G o t o step 7.
NO—If the screen indicates PASSED, intermittent
failure, system is OK at this t i m e . Check for poor
connections or loose terminals at the MAP sensor
and the PCM. If the screen indicates NOT
COMPLETED, go to step 4 and recheck.
7. Turn the ignition switch OFF.
8. Replace the MAP sensor (see page 11-218).
9. Turn the ignition switch ON (II).
10. Reset the PCM w i t h the HDS.
11. Do the PCM idle learn procedure (see page 11-340).
12. Start the engine. Hold the engine speed at
3,000 r p m w i t h o u t load (in Park or neutral) until the
radiator fan comes o n , then let it idle.
13. Test-drive under these conditions:
• Engine coolant temperature above 158 °F (70 °C)
• Engine speed between 1,400 and 6,500 r p m
• Transmission in D position
• Vehicle speed accelerated f r o m 16 m p h (25 km/h)
to 31 m p h (50 km/h) under half throttle
14. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
Y E S — I f DTC P1128 is indicated, check for poor
connections or loose terminals at the MAP sensor
and the PCM, then go to step 1. If any other
T e m p o r a r y DTCs or DTCs are indicated, go to the
indicated D T C s t r o u b l e s h o o t i n g .
NO—Go to step 15.
15. M o n i t o r the OBD STATUS for DTC P1128 in the
DTCs MENU w i t h the HDS.
Does the screen indicate PASSED?
Y E S — T r o u b l e s h o o t i n g is complete. •
NO—If the screen indicates FAILED, check for poor
connections or loose terminals at the MAP sensor
and the PCM, then go to step 1. If the screen
indicates NOT COMPLETED, go to step 13 and
recheck.
11-143