Test Procedure

WARNING: This page is about a different variant/trim than selected.

QE1 CHECK FOR THE PRESENCE OF ANY DTCS OTHER THAN THE INFORMATIONAL DTCS

NOTE: The PCM DTC P1A0C with no other DTCs present indicates excessive start attempts or stalls with a hot catalyst.

NOTE: Informational DTCs are P1A10, P1A0C, P1A0D, and P1A0E.

Are any DTCs present other than the following: P0A09, P1A10, P1A0D, or P1A0E?

Yes	No
For DTC P1A0C alone, GO to PINPOINT TEST DV . For all others, DTCs other than informational DTCs should be diagnosed in the following order: PCM KOEO, PCM KOER, TCM On Demand, PCM CONT and TCM CONT. DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DTC CHART .	GO to QE2.

QE2 CHECK FOR THE PRESENCE OF PCM DTC P0A09

NOTE: The PCM DTC P0A09 indicates the DC/DC Fault (DCF) circuit is shorted to ground, there is internal DC/DC damage, or the 12 V bus voltage dropped below calibrated threshold.

Is PCM DTC P0A09 present during the self-test?

Yes	No
For KOEO or KOER DTC P0A09, GO to HH16. For continuous memory DTC P0A09, GO to HH21.	GO to QE3.

QE3 CHECK FOR TGAC AND TMAC CIRCUITS SHORTED TO SIGNALS IN THE SAME HARNESS

PCM connector disconnected.
Transaxle Assembly-B connector disconnected.
Measure the resistance between:

(+) Transaxle Assembly-B Connector, Harness Side	(-) Transaxle Assembly-B Connector, Harness Side
TGAC - Pin 9	TMAC - Pin 4
TGAC - Pin 9	MSDN - Pin 5
TGAC - Pin 9	GSDN - Pin 10
TGAC - Pin 9	CTO - Pin 1
TMAC - Pin 4	MSDN - Pin 5
TMAC - Pin 4	GSDN - Pin 10
TMAC - Pin 4	CTO - Pin 1

Are the resistances greater than 10K ohms?

Yes	No
GO to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX for further direction. If the symptom is not listed, REFER to Workshop article or GO to Pinpoint Test Z in this part, for intermittent PCM/TCM diagnostics.	REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.