B2995
DTC B2995 or DTC indicator R: A Problem in the Auxiliary Electric Water Pump Circuit1. Clear the DTC with the HDS.
2. Operate the climate control system in several modes.
3. Check for DTCs using the HDS or self-diagnostic.
Is DTC B2995 or R indicated?
YES - Go to step 4.
NO - Intermittent failure, check for loose wires or poor connections on the auxiliary electric water pump circuit.
4. Check the No. 6 (7.5 A) and the No. 30 (7.5 A) fuses in the under-dash fuse/relay box.
Are the fuses OK?
YES - Go to step 5.
NO - Replace the fuse(s), and recheck.
5. Warm up the engine (until the radiator fan comes on).
6. Turn the ignition switch OFF, and then ON (II).
7. Set the temperature control on Max Hot.
Does warm air come out ?
YES - Go to step 8.
NO - Repair the heater valve.
8. Turn the ignition switch OFF.
9. Remove the auxiliary electric water pump relay from the auxiliary under-hood relay box A, and test it.
Is the relay OK ?
YES - Go to step 10.
NO - Replace the auxiliary electric water pump relay.
10. Measure the voltage between the auxiliary electric water pump relay 5P socket terminal No. 1 and body ground.
Is there battery voltage?
YES - Go to step 11.
NO - Repair open in the wire between the No. 6 fuse in the under-dash fuse/relay box and the auxiliary electric water pump relay.
11. Turn the ignition switch ON (II).
12. Measure the voltage between the auxiliary electric water pump relay 5P socket terminal No. 5 and body ground.
Is there battery voltage?
YES - Go to step 13.
NO - Repair open in the wire between the No. 30 fuse in the under-dash fuse/relay box and the auxiliary electric water pump relay.
13. Turn the ignition switch OFF.
14. Disconnect the auxiliary electric water pump 4P connector.
15. Check for continuity between the auxiliary electric water pump relay 5P socket terminal No. 2 and the auxiliary electric water pump 4P connector terminal No. 4.
Is there continuity?
YES - Go to step 16.
NO - Repair open in the wire between the auxiliary electric water pump relay and the auxiliary electric water pump.
16. Check for continuity between the auxiliary electric water pump 4P connector terminal No. 3 and body ground.
Is there continuity?
YES - Go to step 17.
NO - Check for an open in the wires between the auxiliary electric water pump and body ground. If the wire is OK, check for poor ground at G202.
17. Reinstall the auxiliary electric water pump relay.
18. Disconnect audio-HVAC display panel connector B (16P).
19. Turn the ignition switch ON (II).
20. Measure the voltage between audio-HVAC display panel connector B (16P) terminal No. 8 and body ground.
Is there battery voltage?
YES - Go to step 21.
NO - Repair open in the wire between the auxiliary electric water pump relay and the audio-HVAC display panel.
21. Turn the ignition switch OFF.
22. Reconnect the auxiliary electric water pump 4P connector.
23. Disconnect audio-HVAC display panel connector A (22P).
24. Check for continuity between audio-HVAC display panel connector B (16P) terminals No. 15 and No. 16.
Is there continuity?
YES - Go to step 25.
NO - Repair an open in the wire(s) to auxiliary electric water pump signal line.
25. Run the auxiliary electric water pump by selecting the CLIMATE CONTROL SELF TEST Menu from the HDS.
26. Check the auxiliary electric water pump operation by touching it with a flat-tip screw driver.
Does the auxiliary electric water pump run?
YES - Substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display panel.
NO - Replace the auxiliary electric water pump.