TROUBLESHOOTING WITH A DIAGNOSTIC CODE - CONTINUED
Table 2. Machine Control System - Continued.
TEST OR INSPECTION
CID FMI CODE
2. Check parking brake switch circuits for a
1. If each resistance measurement is
0070 03 -
short to +battery circuit.
greater than 5,000 Ohms, go to Test 3.
(a) Wiring harness connector(s) remain
2. If one or more measurements was less
disconnected from ECM.
than 5.0 Ohms, there is a short between
(b) Battery disconnect switch and engine
wire F765 BR and circuit with lowest
start switch remain in OFF position
resistance measurement, or short
between wire E417-OR and circuit
contact N/O (wire F765 BR) and
with the lowest resistance
contact N/C (wire E417-OR) from
measurement. Replace wiring harness
in question (WP 0169 00 thru WP 0175
(c) At ECM wiring harness connector,
measure resistance from contact N/O
(wire F765 J2-53) and wiring harness
contact N/C (wire E417-OR) to all
contacts used in ECM wiring harness
3. Check parking brake switch circuits in
1. If resistance is less than 5.0 Ohms, go
to Test 4.
(a) Wiring harness remains disconnected 2. If resistance is greater than 5,000
from ECM and switch.
Ohms, circuit is open. Replace wiring
(b) At switch harness connector, connect a
harness in question (WP 0169 00 thru
jumper wire between contact N/O
WP 0175 00).
(wire F765 BR) and contact N/C (wire
E417-OR). At ECM harness connector,
measure resistance from contact J2-53
(wire F765 BR) to contact J2-52 (wire
4. Check parking brake switch operation.
1. If resistance from contact N/C to
(a) Remove jumper installed in Test 3.
ground is less than 5.0 Ohms, and
(b) Wiring harness remains disconnected
resistance from contact N/C to contact
from parking brake switch.
N/O is greater than 5,000 Ohms, go to
contact N/C (wire E417 OR) and other 2. If resistance measurements do not
lead to contact N/O (wire F765 BR) of
differ for both contacts, or
switch harness connector. Refer to
measurements have not changed from
previous test, replace parking brake
00). Measure resistance between
switch (WP 0092 00).
contact N/C (wire E417 OR) and
contact N/O (wire F765 BR).
(d) Disconnect lead from contact N/O
(wire F765 BR) and connect lead to
ground (wire 202-BK).
(e) Measure resistance between contact N/
C (wire E417 OR) and ground (wire