TM 9-6115-729-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
MALFUNCTION
Electrical Connections Faulty.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to COOL DOWN/STOP. Set Battery
Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
STEP 2.
Check DC voltage at slave relay (SRY) pin 87 (+) with respect to 86 (-) (FO-2,
sheet 2).
a. If voltage is not +24 Vdc, Measure voltage at SRY pin 30 (+) with respect to
86 (-).
b. If voltage is +24 Vdc, measure SRY pin 85 (+) with respect to 86 (-).
c.
If voltage is +24 Vdc, replace SRY (WP 0041 Guide).
d. If voltage is not +24 Vdc, replace GSC (WP 0040).
e. If voltage at SRY pin 30 is not +24 Vdc, measure voltage across CB-4.
f.
If voltage is greater than +0.2 Vdc, replace CB-4 (WP 0054).
g. Verify voltage at batteries. Recharge or replace batteries as required
STEP 3.
Check for correct installation of ECM to EMCP harness connector ENG-P1 to
ECM J1 and of engine harness connector ENG-P2 to ECM J2 (cables plugged in
to ECM) (FO-2, sheet 1 and sheet 2) and (WP 0090, figure 2, sheet 3). Plug
connectors in securely and torque the ENG-P1/J1 and ENG-P2/J2 connectors to
55 lb. in.
STEP 4.
Check engine harness timing sensor connectors ENG-P4 and ENG-P5 and unit
injector connector ENG-P300/J300. Plug connectors in securely.
STEP 5.
Verify connections between LSM pins A4-19 and A4-20 and the ECM input pins
ENG-P1-5 and ENG-P1-66 (FO-4, sheet 2 and FO-3, sheets 1 and 2). Look
specifically for intermittent connections FO-2, sheet 1. Repair or replace wiring,
STEP 6.
Verify the problem has been resolved.
MALFUNCTION
ECM May Not Be Leaving Cold Mode Operation.
CORRECTIVE ACTION
STEP 1.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to START.
0011-26
